We just put a Weiand 8-71 on our 454 crate motor and made 750 hp on pump gas, with over 700 lb-ft everywhere you looked. Every time we test blowers they make killer power, but you hardly ever see them on the street any more becuase of the Pro Street stigma.

So tell me, are Roots blowers cool or stupid?

DF

I'd say the reason that you never see them is that they are not the cheapest power adder when you have NO2 for 1/4 the price, they are expensive engines to build... They just aren't for everyone.

They are cool on other peoples cars.

They look awesome, they make great power, but not really real world practical.

I wouldn't want the hassel.
I'm dreaming of the day, I get an under the hood blower for my 502.

Can you drive a Roots blower in the rain ?
California guys are spoiled, you guys have great weather, PA weather sucks, cold, wet, snow.

I'd think it would draw too much attention.
I enjoy my cars from the driver seat, that is its more important that they be fun to drive, not for showing off.

I like the Rad Rides aproach of hidden power.

Roots blowers are one of my favorite hot rod items.. They're just too rich for my blood.

Plus nothing is as intimdating as seeing a tall blower in your rearview

Nothing stupid aboout a roots blower.

nothing like a blower sticking up through the hood,as long as u have them set up right.

they are sweet, but I can't afford them.

Definitely cool!

Freiberger. You might want to check out one of the members cars here.

http://bruteforcechevelle.com/

Blowers make a huge statement, but the cars are rarely very fast, or driven very hard. I want to put a whipple style on my 427... Everything under the stock flat hood, and no tell tale noise.

Originally posted by TJC:
Blowers make a huge statement, but the cars are rarely very fast, or driven very hard. I want to put a whipple style on my 427... Everything under the stock flat hood, and no tell tale noise. Funny you say that. I went to a 'Dyno-day' at a local speed shop. Guy had an old crapper with a very impressive looking engine.Poslished blower sticking out of the hood.Braided lines AN fittings,dual quads.Looked like an engine off the Summit racing Catalog cover. Put out a whopping 419 HP. graemlins/sad.gif
There were stock looking 03 Cobras over 500 and a few mid 90's F-bodies pushing 600hp. Also an 80's s10 blazer with a 350, looked like a real beater,put up 429Hp.

I think they are COOL as I have a friend with a very radical yet very streetable street machine with a big inch roots blown intercooled engine - BUT I think they are impractical for more than the weekend warrior. Although no more mechanically-impractical as big roller cams and triple valvesprings, but because you have no hood and can't park the car anywhere unattended.

When my buddy built his car, he had trouble finding ANYBODY going for big power on the street on gasoline. There are two ways people seem to go with roots - it's either a very low boost bolt-on weiand or B&M "kit" blower that is more for show than go or it's a purpose built alky injected with a barrel valve that gets about one mile to the gallon and cannot street drive.

BDS is pretty convinced he's the only one they know of driving on the street with a 14-71 hi-helix delta exit double stripped blower with carbs and pump gas. It was already making about 900 ftlbs at around 2900 RPM when they started the pull and the power and torque just went up from there! At low boost with his previous (smaller) blower he was making 1100 - he has not dynoed with the 14-71 yet.

There are pics here and soon to be video of his car:

www.lumpracing.com (http://www.lumpracing.com)


He finally found the blown braintrust - the boat guys. That's where all the blowers are going. They are lake water cooled so they can ward off detonation easier so many go for big power on pump gas.

The reason I will never run a roots is the showboat factor. If you drive into the track or the local hangout with 4 feet of blower and induction sticking through the hood, you will have to fight off the masses as they all try to get a better look. Now, some people like that sort of attention, but I prefer to speak softly and carry a big stick.

Nothing worse than seeing a guy drawing a big crowd at the track - big loud blower complete with drone that is a SLUG - you KNOW it would run quicker if you took out the blower and ran a single plane. Nothing better than spanking him with a car that is much quieter and has the engine hidden under the hood!

Now if you are looking for something to build, why don't you put a huge centrifugal on that thing! That's something I NEVER see in the mags - a centrifugal blown big block. Blowthrough is fine by me - but don't run 5psi and call it good - turn up the wick and see how much power it makes! One of the PGD applicants I know who didn't get in was running around 20psi on pump gas with a big centrifigal blowthrough and it made over 900 rwhp - you should do that!

DF,
Way cool graemlins/thumbsup.gif

And even better if they are blown early 392 Hemi street engines :D

This one is going in a 37 Chevy

http://wsm.ezsitedesigner.com/share/scrapbook/19/190264/392_Hemi_007.jpg

http://wsm.ezsitedesigner.com/share/scrapbook/19/190264/392_Hemi_005.jpg

Still way cool to look at and to drive but I won't be putting one on anything I plan to drive with any frequency. I might go Procharger for a driver, but Pro-Street blown and tubbed cars are still cool.

I've never considered a blower because:

1) too much image
2) too hard to "roll in" the torque when dialing traction.

These things have changed - certrifugal blowers can drop under the hood - timing controls help with the traction issue.

Centrifugal blower, fuel injected small block - all under a flat hood in a small tire chassis. Ymmmmm!

MAT

Before I built my 439 BBC, I wanted to buy a blower and just strut my stuff. I shoulda stuck to that plan.

I think that Roots blowers are way cool. And by no means outdated like some people think.

I have always loved the look of them. The way they sound. I am currently planning to tub my 1980 Malibu and stuff in a roots blown BBC.

Chris.

Here is the definitely cool trend: twin power adders. Like the pump gas drags Chevy II with a mini blower AND nitrous, or the Silverado 4WD with a turbo 6 liter AND nitrous (both of these runs 10's in complete street trim).

I don't know the guy with the Chevy II, but I've seen him run at Irwindale and Fontana and it is absolutely unfreaking believable.

The big roots blowers can make sick pump gas power, but few are set up that way. Mostly the big blowers seem to be favored by the street rod crowd who will NEVER race their car.

The big blowers were really cool in the '60's - when almost no one knew how to set one up for street reliability. It was so exotic when you finally ran into one on a street car. Then the whole Street Rod and Pro Street crowd glommed onto non-functioning blowers. Then everybody seemed to think it was just a joke when they saw one, because they knew that little bite lay behind the bark. Often times when I meet a car with a big blower at a car show the owner is too often into bragging about the power that they don't make. One guy I met who did have his blown big block dialed in on "kill" bravely admitted that he had created a monster that was hard to drive on the street.

Freiburger buddy, have you ever done much of any street driving with a big blower on a big block? Having 700 lbs of torque available down low in the rpms poses its own set of problems - mainly that the car is pretty undriveable except on the dragstrip :D

Thomas

Thomas,

I beg to differ about driveability - when we are in the fairlane in the link above - he does not pull any punches on the street. He will leave off the transbrake WOT from a light and it'll smoke em for an instant and then buggers off, believe it or not. I can't figure out why, but it hooks just about as hard on the street as the track. 1.35 60 foot on an 11" tire. And this thing makes 4 figure hp and tq before 5000.

My angle on the big blowers on the street is practicality - like said above - what do you do with it rains? Can you drive on a gravel road if you have to? Can you see a kid running onto the street, or a dog under 3 feet tall for that matter?

Hard to drive on the street - I keep hearing people say that - maybe hard to drive for your grandmaw if you handed her the keys and said "Drive to church" but if you have a hotrodding bone in your body you will find a way to drive it. My 632 is a pussycat to drive on the street and it makes much more than 700 ftlbs. It only gets loose if I use the nitrous so I only do that when I have a lot of empty lanes to use.

Personally, I don't use my car for commuting so I want as much power as possible, PERIOD. The only way I would run a roots is EFI alky. If I could put a 50 gallon tank in my car to get around town and back, it would be unfreaking-beatable! If you had some cubes you would dial it up to 1800hp w/o setting it on kill and it would be impossible to overheat!

perhaps mr freiburg should fly to waasa,finland.i and my friends drive roots powered cars all the time.someone asked if roots blower can be driven in rain.yes it can. no sweat.my friend drove his mopar 413+6-71 powered el camino during the winter but ice on carb linkage slowed him down somewhat.another friend of mine drives to track with his sbc+ mike kuhl 8-71 and runs low nines at 145 mph.roots blower is the way to go here.you can see wanted:roots blower ads in every forum and papers around.the el camino guy even lives in a place called "blower hill".it reads so in offical maps.he also owns a -34 ford with 6-71 blown 440 .my little brother owns a -71 `cuda with blown 400 cid bb.roots is alive and well in arctic regions!!

David,
I like all of them. I've done two 6-71 setups, one carbureted and one blown alcohol. Several centrifugals, and a couple of turbos plus my present twin turbo.

I'd like to see a direct comparison on the same engine of all three. Problem would be that the camshaft for a turbo is completely different than the one for a roots or centrifugal. I've seen a couple of late model cars who've swapped with no changes (stock cams) and the power difference between a roots or centrifugal and the turbo was huge, bigger than I would have expected.

Jody

I agree with most here Root's blowers are great but they have a bad wrap for the street cause most don't set them up to make any boost ...all looks and no go .......I will say this though a few have made them work on the street and Ryan was good enough to take me over to see his buddies Fairlane !!!!!!! you should here this thing run and even more impresive is how easy it starts !! it's all he says it is .....but not too many cities would allow you to have that thing sticking up blocking the view so alot of us don't go there because of police hassle ..... for the street Turbo or centrifigal makes more sense to me, especially since EFI makes it so much easier to tune

Ryan .. you mentioned BBC centifigal blown, check out CarCraft in a few months for a local car to be featured soon, 69 EFI BB Camaro ....photo'd at CarCraft nationals this july ...... this thing is real and tuned by a very bright young guy makes serious HP ( 900-1000), he happens to have a Mustang dyno in his bodyshop ....I should hook you two up ....... talk to you next time I get to calg. Not sure how to attatch photo of Camaro so will send to you
Bill

Okay, as I have one of the few blown cars (http://www.chevelles.com/showroom/10sec69/engine6.jpg) here, I'll chime in. It's a sad truth that the majority of people running a roots these days are doing it for the image. Go to any big car show and count 'em up... you'll see dozens. Now check out any dragstrip… there's very few, if any. (I'm talking about street cars.) Take a look around this site. I can think of a quite a few blown Chevelles here but how many actually get raced? Mine does. It seems the argument that people aren’t putting them on simply because on the pro-street stigma isn’t true.

Ask any kid that’s ever owned a Hot Wheels car… it’s been burned into our brains that even a homely VW minibus was just a big, honkin’ huffer away from being a cool ride. I was no different. I remember hoping the miniseries “Roots” was a car movie. :D As an impressionable 16 year old, my final straw was taking a death ride in a 9 second ’41 Willys – complete with a blown 426, dual plug Hemi. :eek: (Coincidentally, it was a Hot Rod Magazine “Fat Attack” feature car back in the late 80’s.) Yep, I was bit. It took a couple of years, I was 25 when I built my first blown engine, but nine years later I’m still enjoying it.

So is it really impractical? It depends on your definition. Sure, it’s an obstruction. But just like any blind spot you’re always aware of it and get used to it pretty fast. I bet I can see more than those of you with 4 and 6” cowl hoods or those that have gauges lining the A-pillar and dash. Driving in the rain? You bet! I get caught a couple times a year. Aside from the minor mess it makes, the engine doesn’t seem to care. If it gets real bad, I can just turn the scoop around. Oh yeah, then there’s the polishing… Mother’s sends me a Christmas card every year thanking me for the revenue. It’s a labor of love though.

The cost? It also depends how you rationalize it. I’m approaching 650 HP with my 355 and have less than 7 grand in it. We always preach here that there’s more than one way to skin a cat so let’s see… I don’t have a bottle to refill and I don’t have to pay $4.25 a gallon for race gas. I’m not bashing or passing judgment here, just illustrating that my investment is done.

To directly answer your question, roots blowers are still cool. Yeah, there are more modern ways make boost (and HP in general) but I still get slaphappy every time I mash the throttle and get embedded in my seat. As far as being dated, yeah maybe, but the bottom line is that I still get throngs of gawkers everywhere I go. Maybe it’s some primordial instinct we’re all born with, Pavlovian primates salivating to the sound of that high-pitched whine. Maybe it’s the fact that my car can actually back up the “image”. People have little patience for the posers that brought down pro-street years ago. I still can’t believe how many cars got featured that had dummy blowers over a single carb intake. Yikes!

I say keep ‘em coming. Just make sure they’re for real! graemlins/thumbsup.gif

Blowers are cool. Mine will be real. Car is painted and motor is waiting on a cam. I am in the Netherlands and unable to work on it :( . Going Home Saturday. By Monday my cam will be on order.

Man Jeff, you're a long ways from home!

Jody

Originally posted by camcojb:
Man Jeff, you're a long ways from home!

Jody Yes I am. Been a fun trip but hard since the week before I left my Pro Street came home from the bodyshop. (Post) (http://www.chevelles.com/forum/ultimatebb.php/topic/2/25800.html#000000)
At least I got wireless at the hotel and still have TC to keep me entertained :cool:

I have also seen a few old Chevies:
57 Pickup, 64 malibu, 71 Chevelle wagon, 67 Caprice wagon, and a very nice 65-6 Fastback mustang. Still nothing like home.....

With the introduction of centrifical blowers and after coolers (air to air heat exchangers) they have lost some popularity. You can run a cent. blower with an after cooler and get more power and still keep it under the hood as compared to a roots blower.
They still have there place, I haven't seen a top fueler running anything but.

They are way cool. Id rather run a turbo + EFI but they are still cool.

A Roots blower is like a Harley,
Not better, just cooler.

I've never really liked them. I believe they can only handle about 8 psi before incomming charge is so overheated they stop making power. I'm also a believer of building a race motor for the street rather than a street motor for race, which I got from you. You could have built a cheaper 13:1 540 that would have beat the blown 454 and would have been easier to tune. Sorry, not a fan of superchargers at all.

Originally posted by kstanbach:
I've never really liked them. I believe they can only handle about 8 psi before incomming charge is so overheated they stop making power. I'm also a believer of building a race motor for the street rather than a street motor for race, which I got from you. You could have built a cheaper 13:1 540 that would have beat the blown 454 and would have been easier to tune. Sorry, not a fan of superchargers at all. I would like to see a 13:1 540 that would beat a properly built blown big block. Of course the blown big block could run on pump gas also whereas the 13:1 540 would not which makes it pretty hard to go anywhere.

I'm a big fan of anything with a lot of power, but the blown motor has a big advantage in my opinion.

Jody

Originally posted by kstanbach:
I've never really liked them. I believe they can only handle about 8 psi before incomming charge is so overheated they stop making power. This may be true of a "baby" roots trying to make boost on a big block but if the blower size is appropriate for the CID and breathing ability of the engine, the point of diminishing returns is much higher.

Wanna go for a ride? I can show you what 13 PSI feels like anyway. :D

I could easily build a 13:1 540 that could beat the 700 hp rat motor built by hot rod. I mention 13:1 to show I had no intention of using pump gas. I would be somewhat conservative on the cam timming so as not to hurt roller lifters, but I'm a firm believer in high compression especially considering TEL (lead) is not hard to purchase and is not that expensive. And yes I do want to go on a ride! My 510 is fun but doesn't hook for s$#t. I believe roots blowers do make incredible power on alcohol, but I wouldn't like to run alky because of its corrosive effects. I would also like to mention I don't think blowers are stupid.

Could you build a 13:1 540 that beat our 820hp 454 on PUMP GAS and was still very drivable with a 240-at-0.050 cam? That's the beauty of boost. And if you are talking race gas with your 13:1 540, don't you think a 15-psi boosted 540 would outrun it?

DF

yes,i think that 15 psi 540 beats the 13:1 540 hands down.at least i`ve done it.when i won the local series, there was a real bad -55 chevy with reher-morrison built bbc that made 1176 hp and 840 lbs.ft.i never got to race against it because it owerheated or broke early.my blown bbc went 9.6-9.7 all summer without even once opening valve covers.my 540 idles at 800 rpm and is totally driveable and the low-end grunt is awesome.with right combo,old roots can produce amazing performance.

You know what I recently found to be cool . . . the sound the roots blowers make inside the car. Had only heard them go by or idling in a praking lot until I went for ride in one.

Point of clarification -- dinky chrome roots blowers are stupid, big honkin' boost makin' blowers are cool. In other words, I don't like little blowers that are all show and no go. Actually, big blowers painted black are cool LOL

I could build a 13:1 540 that would make more than 840, but it would not be with a 240 at .050 cam and would run on 120 octane race gas. My 510 uses a .660 lift and 256 at .050 and 264 at .050, 108 lobe sep and installed at 104. This cam has ungodly amounts of torque and 9-10 inches of vac at 900 rpm. I mention this because 240 at .050 in a 454, to me, is a wussy cam. I believe my cam is tame because of my 13:1 compression. Of course I use a 4 speed and 4:10 gears, so my impression of drivable may not be yours. Would I drive it on the power tour, hell no, but because I don't feel like wearing out my brand new rings, valve springs, and so on. Could I build a 13:1 540 as streetable as your blown motor, no. Could I take it out on a warm friday night to the local puke and choke, yes. I guess I'll call it streetenough. I still wonder what you super bee would do with higher compression. Of course a blown 540 with 15 pounds of boost would outrun my N/A 540, but wouldn't that 540 need to run on race gas too?

" Of course a blown 540 with 15 pounds of boost would outrun my N/A 540, but wouldn't that 540 need to run on race gas too? "

Nope, that's the beauty of a blown motor. My last blown big block made over 800 rwhp and ran fine on 91 octane. I've done the race gas deal in the past and while fun you can't really go anywhere. I want to make huge power, and be able to drive it anywhere.

Jody

http://www.chevelles.com/showroom/ratuned/NewEnglandDragway10-03006.jpg

http://www.chevelles.com/showroom/ratuned/NewEnglandDragway10-03005.jpg

http://www.chevelles.com/showroom/ratuned/NewEnglandDragway10-03003.jpg

hows this for an original 427-435 car? blowers are way cool. cars owner is 80+ years old. rebuilds his own blowers and runs tripower on them. this car has a super T-10 and 3.08 gears. with mickey thompson L-60 tires runs low 11's. should have seen the look on all the vette guys faces on dyno day!!

:rolleyes: Guess!!

Of course they're cool.What is cooler than a flat torque curve that starts at 2000rpm?Or making 1000hp on pump gas?Or just the sound?Everyone looks...It isn't because they are stupid!...Besides my mom TOLD me mine was cool.:cool:

Plus they sound cool.

I think they are cool..no doubt about it. But like most, I hate it that you never see any that actually run very often. I would love to see BDS or Weiand put together a nice competitive car and go head to head with the centrifugal guys. Might be tough,,,,but there has to be a way to make a showing.

If nothing else, find some funky class to compete in or at least do a full feature on taking one to the track and making it run. At least old Project X used to go play at the track and they were using weanie mild stock type shortblocks. There has to be some decent set up non tubbed car that could handle a blown big block out there you can get. You can build a 540 with a decent cam and heads and see what it does. There's enough timing control stuff out there to help control it if necessary.

Aesthetically...you have to have the right car. Some look dorky..some are cool.

I don't see any issues with driving them in rain etc...water won't hurt them unless you're in a flood.


JIM

well i just about have this finished. it's going into a street legal backhalved 75 vette. i havent done much at the track since i got rid of my bracket bike but i'm hoping to have some fun when this is done. eventually. not the cheapest project i have ever tried. oh guess how i voted.
http://img.photobucket.com/albums/v478/panchop/MVC-858F.jpg

I won't go as far as to say they are stupid. BUT......

Most people I've talked to, in regards to making power, feel it's much more interesting and difficult to make power naturally aspirated. There's no magic belt or bigger pill to cover up the rest of the engine's shortcomings. No disrespect or flame to any blower/NO2 owners intended.

Naturally aspirated offers bigger bragging rights as well.

BY FAR one of the biggest statements/image of a hot rod ever. My `71 gets rubbernecked by every single car I pass by going down the road. Guys have pulled up next to me in BMW`s and started clapping. A guy today almost ran into another car checking mine out and I could read his lips(he was on his cell phone) He said what a bad A** Chevelle. Chicks dig it what else can you say. And the earlier poster was RIGHT ON. Most blower engines are mostly show and not as much go, but so is a Harley,,,arent they pretty popular these days and as far as a bike slow as He** compared to sport bikes with 1/2 the Cubic inches.
The Blower whine is worth the price.

we all dream of one....
those who dont dream of one already have one

I think roots blowers are cool....but IMO unless your car is tubbed with slicks they're almost impractible. But on the downside I'm not too fond of a blower sticking out of the hood, especially on a classic.


I was going to make my next project a small blocked S-10 and throw one of those mini blowers on, but after evaluating everything it would be a case of traction blues. I'd have so much power in the lower rpms and the rear would be so light I'd never hook up. And since this was going to be a street truck I had no intensions of a tub job.


So now I'm considering going centrifugal s/c. That way the extra boost isn't until after I'm moving, and by that time I figure there's less of a chance of breaking them loose.

I wouldn't mind having a Roots style blower as long as I could hide it under a 4" cowl hood that I can keep locked down.

Personally, I don't like advertising how my stuff may run.

I'm the guy who hangs out on the back row at the local cruise spot and whispers "Psssst, hey kid! Wanna run my old heap for a few bucks?" to all the posers who rumble by.

Randy

i have run blowers since the 60's(prob had over 30 blower cars) most recently been using the prochargers-i still think nothing looks as cool as a huffer sticking thru the hood-i have driven all over the country with one sticking thru the hood, rain, snow(not intentionaly-coming home from indoor car show) everyone has an opinion , good or bad of them, build what you want, what your capable of, (some people should be made to take a test b4 even owning a car) i have seen to many people buy cars and dont have a clue what their getting into-now, if you want killer power, turbos, turbos
the sweetest sound i have ever heard is a blower car, in the water getting the tires hot, sittin on the shift light-dam, winters coming, project time again, makes me want to cut another hood out for a blown b/b(lol)

I'm trying to figure out how to respond to this thread and I guess the best way is to describe a real life event, so here goes it; a local drives into the track with a 70 Chevelle, carbureted roots blown 454, (gorgeous silver with black stripes), Jacks up car, swaps over to 10" slicks and proceeds to rip off high 6's, (1/8 mile), very, very, cool. Several months later a guy shows up in an enclosed trailer and rolls out a beautiful prostreet 57 chevy, full back half, detailed roots blown BBC, lowered, hung on the ground, killer looking car. Puts it on the track and rips off an 8.20, very, very, uncool!

I guess what I'm trying to say is they can be cool (in the right hands) or they can be stupid. For me, if your going around struttin your stuff, please have the capability to back it up. And for the love of everything holy (to us hotrodders), please don't embarrass us by getting smoked by a ricer.

They are very cool, but also stupid. All too often its a "looks like I have 800 hp" thing with a big roots sticking out of the hood. But reality has it, they often arent anywhere near that much. They do make tons of torque, but they are very inefficient, they are heavy, high center of gravity, they make a ton of heat, and the visibility out the windshield is very poor, all for a hefty price. Like 66 283 mentioned, your either running low boost on pump gas, or your running alky, which isnt great for cruising as theres nowhere to fill up. I personally would build an EFI roots motor that could run on both gasoline, and methanol, and perhaps a mix of both. For practibility and/or power, turbos, centrificals, and screw type SC's are better choises.

Roots blowers, while ineffeicient to say the least, are still cool. We run 6-71s on our Front Engine Top Fuel dragster, as required by class rules, and we actually do pretty good with them. (6.18 @ 235) But, these are not off-the-shelf pretty blowers. Yes, the ones we have are polished, so they still bling, but only if the restraint bag is off. We run billet cases and rotors, the rotors are of course stripped, and anodized. We generally get about 45-50 psi out of them, so our manifold temps get pretty high, and we routinely run well over 95% Nitro. Normally it's right out of the barrel. No, Roots blowers aren't dead, but I honestly wouldn't run one on the street.

Quote: I would love to see BDS or Weiand put together a nice competitive car and go head to head with the centrifugal guys. Might be tough,,,,but there has to be a way to make a showing.

From my TAD days when we went from a roots to a centrifugal(Whipple at first and then PSI) there wasn't any contest. So I don't think the "Roots" guys would stand a chance.

Eddie, I beleive you are talking about 'screw-type' blowers, not centrifugal.

Oops you're right. Happens when you get old.

From my TAD days when we went from a roots to a centrifugal(Whipple at first and then PSI) there wasn't any contest. So I don't think the "Roots" guys would stand a chance.
I would put a PSI up against a centrifugal any day...

Well, I have more power than I know what to do with when getting on it, it drives like the familiy wagon when cruising, I run pump gas from any station and I get 17-18mpg with 1500cfm of carb. The family 2003 Durango with a tiny V8 only gets 12.5mpg.

Don't think I could do that without the blower. The engine was carefully thought out...small 355 displacement and high 12-14psi boost.

You can pull up to the guy sitting in his $250,000 F40 Ferrari with his shades and driving gloves posing at the lights..all the time thinking he is the cat's meow until you pull up with the big blower whining away and then he might as well be in a volkswagon beetle. People love blowers and it makes the girls wet.

I admit that most blower cars are for looks, but not all. I was one of 5 big roots blown cars at the cruise last weekend. The other 4 had stock iron smog heads, were running 5-7 pounds of boost, had stock cast cranks and couldn't tell you what size cam they were running. The cars ran well, and weren't making big horsepower, but they were happy. If there were no such thing as blowers, these are not the kind of guys who would be running built stroker big blocks with 800hp anyway. Then there are the guys that do run built blower motors or stroker big blocks with denominators and nitrous. Different group.

Just checked your link, great pictures! Does PSI make a street blower? I know Whipple used to or maybe still does. PSI's iare so much lighter, but it is difficult to understand Norm when he rattles on.

You can pull up to the guy sitting in his $250,000 F40 Ferrari with his shades and driving gloves posing at the lights..all the time thinking he is the cat's meow until you pull up with the big blower whining away and then he might as well be in a volkswagon beetle. People love blowers and it makes the girls wet.



Quite certain most the chickies will get in the Ferrari instead. And I wouldnt underestimate an F40 with a decent driver, they are no slouches in a straight line. I'm not sure what kind of ET's you run, but I'd guess in the 11's too, and as soon as it came to brake for the corner, the F40 goes in way deeper, takes the lead, and carries about twice as much speed through the corner and is long gone. For me, a blown car and an exotic have different kind of draw dropping apeal. The blown car just roars power (though as known its not always the case), but the ones that surge at the stop lights and shake the road, set off alarms, thats just awesome. When I see a Ferrari, I know that car is top quality performance, and there is a passion I cant duplicate.

There were stock looking 03 Cobras over 500 and a few mid 90's F-bodies pushing 600hp. Also an 80's s10 blazer with a 350, looked like a real beater,put up 429Hp.

Thats the funny part. Sometimes I just can't understand the whole power to CI ratio. I've seen V6 Nissan 300zx's putting out 450 Horsepower and its all streetable. SBC's put out well over 500hp. I figured I'd start with a Big CI 454 and was hoping to push out 600+ with all the mods done. I read an article a number of years back about a corvette with a huge blower that was putting out over 1500hp which is just totally incredible. At the same time I know people who have worked engines where everything appers to be done right and their putting out 375 at best.

ANYWAY BLOWERS ARE COOL NO MATTER WHAT THEY ADD. JUST HAVING THE SCOOP STICKING OUT OF THE HOOD IS BOSS.

I've never considered a blower because:

1) too much image
2) too hard to "roll in" the torque when dialing traction.

These things have changed - certrifugal blowers can drop under the hood - timing controls help with the traction issue.

Centrifugal blower, fuel injected small block - all under a flat hood in a small tire chassis. Ymmmmm!

MAT

I'm building a car exactly like that at work. Using the stock steel flat hood. I'm in the fabrication stages now, building the plumbing for the intake. The engine put out over 1000hp. Pretty wild peice.

I think it would be nice if a large case twin screw were more readily available so one could have the looks of a roots with the efficiency of a twin screw, as well as disgusting amounts of power.

I'd love to build a roots blown 540 BBC, with a 1071, no 12 or 14-71 topped with Enderle FI and Bugcatcher scoop. Ah crap, I made a mess just thinking about it.

I would have to say they are "Very Cool"

if you want one, and like the way they look, it doesnt matter what anyone else thinks

I never cared for that look..... but to each their own!

I think they are cool as long as it's an 8-71 or bigger.

Can't they be both? :D I was looking for the "yes" option on the poll.

Cool, as long as it's on someone else's car. I personally wouldn't want one though.

Can't they be both? :D I was looking for the "yes" option on the poll.

Cool, as long as it's on someone else's car. I personally wouldn't want one though.


Oh come on Derek, I can just see the 30 foot snow rooster tails, behind that T.:)

bill

Roots blowers are awesome. My step dad has a 6-71 to go on his 23 T-bucket.

It will be bad once it's done.

Nothing SCREAMS awesome like a big, bad, roots blower sticking through the hood. JMO :thumbsup:

I'm not totally against the roots blower, but for several reasons I find that it is lacking in the modern performance arena.

1. I like to corner as well as go in a straight line and a roots blower adds weight to the wrong place (high up).

2. They aren't as efficient as (and thus make less power than) a centrifigul, Whipple and especially a turbocharger (power adder of choice).

3. I don't usually want to announce my intentions. I just like to drop the hammer on the unsuspecting (or as unsuspecting as possible). Not that it really matters if I'm racing an unsuspecting person, I will probably win or lose regardless, but there is a certain novel quality about doing the unexpected.

4. I don't like to announce my intentions to the keepers of the peace. Not that I'm out there tearing up the streets, but I would rather drop below the radar if at all possible.

That said, I do like the looks of a roots blower and I do like Pro Street provided that the car is in the 7s or 6s because 8s are easily possible and are more and more regularly hit with wheel well-sized tires on street cars in this day-and-age.

Ryan

We just put a Weiand 8-71 on our 454 crate motor and made 750 hp on pump gas, with over 700 lb-ft everywhere you looked. Every time we test blowers they make killer power, but you hardly ever see them on the street any more becuase of the Pro Street stigma.

So tell me, are Roots blowers cool or stupid?

DF

roots make less power than a centrifugal blower..the centrifugal would be pretty stretched to make the same low end power/torque a a roots. Usually no way a single centrifugal could make same low end power as boost builds with RPM while with a roots you have almost peak boost the minute you floor it. All that lowend torque can often work against you, though, on a big power motor as it is tough to find traction.

No self respecting hot rodder would think a roots blower (or any blower) is "stupid".

Are shiny paint jobs "stupid" the car looks fast, but isn't. How many non blown cars are posers? (big tires, loud pipes, fancy wheels).

As mentioned already not all blown cars are set on kill. There are some slow big blocks out there too, that doesn't mean all big blocks are "stupid".

I don't think the question was which power adder is the most efficient, or which one fit under the hood. If you plan accordingly you can make the most out of any of them.

Roots blowers can make big power and be very streetable. They can also be just for show, you can tell the difference on sound alone (if you know what to listen for). Even the "just for show" blowers are making more power than that engine would make without the blower. To some people 450HP is a lot, to some 800HP is a lot, and too some it takes over 1200HP to get their attention.

You either have a blower or you want one, if you are a hot rodder (IMO).

I'm not sure who said you can only run 8lbs of boost with a roots, but that is wrong. My set-up gives me 12lbs on 91 octane with no issues. There's more to it than botling on a blower and all blowers are not created equal.

Wheezers are where it's at!

D.F. I always thought the 366 truck block would be and excellent choice for a blown motor. Small bore, long stroke, can use a long Chrysler rod,big bearings. An engine that begs for 40 pounds boost. Probably has walls .300 thick.

PS. I still have a set of +.030 Arias blower pistons for 5/8" long rods in the garage, if your interested. I think there are 9 of them. You have no idea how right the price could be. With .043 rings. And T-pins. Ooooohhh!!! T-pins!!!

Tokyo Torquer: Yours is an enviable set up!!!

Nothing SCREAMS awesome like a big, bad, roots blower sticking through the hood. JMO :thumbsup:

You can say that again - also the power they make is unbelievable. Wouldn't trade mine for the world.

Dan

I got a '68 Camaro with a 420sbc and a 177 Weiand single carb blower. I built mine all go no show. The blower is satin finish. It all hides under a 3" cowl hood. My car is an everyday driver my grandma could drive. I got a tight stall, and a 3.55 gear. I run 18's in front and 20's in rear wrapped in Nitto rubber. No tubs, just Cal-trac bars. My car is very streetable. I just installed a water injection system to add more boost/timing. I had a '95 Firebird with a centrifical and I like the roots much better. The roots is in at 2000, the centrifical don't come in till 3500+rpm. I didn't have the bird long enough to really tune it out. I bought it with the charger putting out 10lbs but the engine wasn't properly set up. It ran a 1.65 60ft and a trap of 11.25@126. The roots has a much better "feel" to it. My specs are as follows:

420 Small Block
3.875 stroke
4.155 bore
9.0:1 CR
215cc Dart Iron Eagle
177 Weiand 6lbs boost May be going to 10lbs w/water injection
Custom roller .590/.608 248/258 @.050 112 LSA
Proform 850 carb
1 7/8 headers w/ 3" flowmasters
TH-350 w/ custom 2200 10" stall 3.55 gear 28" tire

The blower tames the cam pretty good kinda like fuel injection or IR systems do. I don't have a cage so I only got one full run when I was first tuning my car. That run was a 10.86@127 1.54 60ft foot braking and not fully tuned. I do a lot of street racing against the camaros, mustangs, and firebirds with N2O or superchargers and most aren't a threat. Most are dogs like my bird was off the line and playing catch up isn't easy. I wouldn't pick a centrifical over a roots but would love to change to a twin screw. I also wouldn't cut a hole in my hood. I like the stealth attack.

stigma?!! WHAT STIGMA??!!

If it fits under a stock hood I like it, I'm more into the sleeper thing.

Good luck getting a fair race on the street with a blower sticking through your hood. I love going to car shows and seeing some guy with an 8-71 sticking ten feet in the air spouting off how he's got 800 hp then a cammin LS1 asks for a couple and the hit and takes his money.

here are some pics of my 496 . click on the x to see

http://http://www.hotfreelayouts.com/pics/671/PDR_0236.JPG (http://www.hotfreelayouts.com/upload.php?id=150722)>

http://http://www.hotfreelayouts.com/pics/886/PDR_0237.JPG (http://www.hotfreelayouts.com/upload.php?id=150771)>

Nothings cooler than an 8-71 poppin through the hood of anything. The look alone is enough to intimidate most anything on the street. Then the sound if that thing screamin down the road or the track..... If theres something better, I want to know what it is so I can get one!

I vote COOL, I'll decide for sure when finally I fire it up......
http://img.photobucket.com/albums/v216/mutfish/Dsc01171.jpg

I think the biggest problem with them is that they cannot fit under a hood! The turbo and centriful setups alow as good or better gains without losing any accesories or hood clearance issues.

They are cool looking though!!

:rolleyes: Guess!!

Of course they're cool.What is cooler than a flat torque curve that starts at 2000rpm?Or making 1000hp on pump gas?Or just the sound?Everyone looks...It isn't because they are stupid!...Besides my mom TOLD me mine was cool.:cool:

check out this flat torque curve,
http://www.mbusa.com/models/features/specs/engine-drivetrain.do?modelCode=SL65&class=06_SL
they used to post the power graph and it crest 700lb-ft at 1800 rpm's.
i'm a fan of anything fast and that's the only reason i post this. if i can mirror this power then i will be more than happy. i do like the look and sound of roots blowers.

turbos turbos turbos. What could possibly sound better than the whoosh of the blow off valve when you chop out of the throttle. My twin mpgt45's will be here monday, hehe. Its kinda snowballing though, all I wanted was a 800hp pumpgas 540 and now they are telling my with a intercooler I should be able to run 15 lbs on pump gas and it should make 1400 at that boost level. Besides I wouldn't want to crash my car or run over a little old lady trying to see around an 8:71. And here in Minnesota it rains and sleets and hails and snows and. Well, you get the idea.

The turbo reminds me of an import for some reason. There is nothing like the sound and power of a roots blower. So what if you have to look-around it. Pull your car up next to mine at a car-show and let's see how many people spend as much time looking at your car as they do mine. The roots blower is the american dream of MUSCLE CARS...end of story. What FUN is keeping everything under the hood...anyhow?

I haven't read this entire thread, so please excuse me if this has already been established......on the first page of this thread, I saw a number of posts that were written concerning the so called advantage and desireability of choosing a centrifugal blower because of the stealth factor since everything stays concealed under the hood.

However I want to point out that you can also have the stealth factor with a small roots type blower, such as the one that I've installed under the hood of my daily driver/grocery getter car. It's an M112 Eaton blower (just like the ones that came from the factory on the 2003/2004 Cobra, as well as on the 2003/2004 Ford Lightning trucks).

I have it on a puney 281 C.I. engine ( 4.6L V8) which propels a big boat of a car (2003 Marauder) weighing in at a whopping 4,444 LBS (with a 200 LB driver, and a half tank of gas) and on pump gas alone the thing turns consistent 12.2 ET's (12.0 in the cold weather) and 1.6 second 60' times with drag radials (which I also run on the street).

My point is, that big blowers that stick out of the hood aren't the only roots blowers that can be had. Mine is on my daily driver which delivers 480 HP to the crank out of a puney 281 small block on pump gas alone. And let me tell you, it's loads of fun and laughs beating Modern stock Camaros as well as stock 2001-2004 Z06 Vettes with this big ark of mine. you should see the look on their faces at the next traffic light after they thought they were gonna walk right by me, and instead they saw nothing but my tailights when I hit the loud pedal. :waving:

Yeah, I wish Kenne Belle made one of their 2.4L blower to fit on a BBC. Or, can ya imagine a Whipple 3.3L on a 502?

Yeah, I wish Kenne Belle made one of their 2.4L blower to fit on a BBC. Or, can ya imagine a Whipple 3.3L on a 502? Yeah, that would be pretty wild. I've heard that the Whipple chargers (like the Eatons) are quieter. It's my understanding that the Kenne Belle S/Cers have more of a whine to them. Some guys like that sound. I'm one of those who doesn't.

i always wanted one now i got one 489 8-71 haven't fired it yet http://i31.photobucket.com/albums/c389/hotrodmanIII/100_0855489withblowerandcarbonsidef.jpg

Gorgeous. What heads?

Neither, they're simply retro.

Frankly, I'm surprised turbos havent caught on in a much bigger way as power adders. A European stigma? I mean I saw a twin turbo bbc Gremlin back in 1979. It hasn't gotten all that much coller , or popular , since?

And maybe we've all adopted a bit of Teddy.... walk SOFTLY and carry a BIG STICK!, i.e., less glitter and "in your face" power for "intelligent design".

I vote cool, btw.

As some might know, I am new to this site and a new Chevelle owner. I was building an engine for a 1975 El Camino but i had a change of heart so i went looking for a car worthy of a 750hp blown 383. I wanted a 70 SS but could not see myself putting a small block into a car that came stock with a BB. so I got a 70 Malibu. anyway my 22 year old self chose a 6-71 over centrifical because of its appearence. i know a centrifical is more efficient but come on. I love the torque this thing has even with a STOCK DRIVETRAIN (will be changing as soon as more money grows on the tree in my back yard). I love most of the attention. some people are creepy and some........"What size engine is that" "Its a 383" "What's that?" anyway i love the roots style blower

As some might know, I am new to this site and a new Chevelle owner. I was building an engine for a 1975 El Camino but i had a change of heart so i went looking for a car worthy of a 750hp blown 383. I wanted a 70 SS but could not see myself putting a small block into a car that came stock with a BB. so I got a 70 Malibu. anyway my 22 year old self chose a 6-71 over centrifical because of its appearence. i know a centrifical is more efficient but come on. I love the torque this thing has even with a STOCK DRIVETRAIN (will be changing as soon as more money grows on the tree in my back yard). I love most of the attention. some people are creepy and some........"What size engine is that" "Its a 383" "What's that?" anyway i love the roots style blowerMe too. IMO the centrifugal superchargers look like a woman's hair dryer. :D I hate the way they look, and the way they don't begin making any substantial power increases until atleast 4,000 RPM's, and in some cases, not even until 5,000 RPM's. Maybe that's okay for a high RPM race-only trailer queen car, but it isn't what I want for a street strip car. Give me the gut wrenching low end and mid-range torque that a roots S/Cer makes any day. Sure they make extra heat, but that's why I have an intercooler system on mine. No heat issues here.

And if you want efficiency, and/or the ability to use over 13 PSI of boost pressure, then go with a twin screw S/Cer such as the Whipple or Kenne Belle. So personally, I'll pass on the centrifugal S/Cers.

Our Procharged 502 makes over 800ft/lbs @3500 rpm.

Btw, thats not any good torque... Only Tame "blowers" Counts ;=)

they just look dam right mean

You be the judge!!!


Before!!
http://www.norcal1320.com/gallery/albums/userpics/10142/chevelle4.JPG

http://www.norcal1320.com/gallery/albums/userpics/10142/chevelle5.jpg


After!!!
http://www.norcal1320.com/gallery/albums/userpics/10142/engine.jpg

http://www.norcal1320.com/gallery/albums/userpics/10142/frontengine.jpg

Our Procharged 502 makes over 800ft/lbs @3500 rpm.

Btw, thats not any good torque... Only Tame "blowers" Counts ;=) Wow!! That's impressive! Is that on gasoline or Alcohol? Any Nitrous needed to make that kind of torque??? And how many LBS of boost???

14 psi of total boost. around 5-6 @ 3500.

Pump Gas. No N20.

Will be N20 this year. Its a little to streetable... just 1015hp@6100 rpm. And 6600 max rpm.

So we ordered a gear set with 3.73 for our 33" tires to get lower RPM.s and then we will add 200-300 shot of N20 to go faster.

This is a tube car. But full street trim. will be competing in www.kingofeurope.net

I can se if i can get a picture on our dyno test page...

Most definitely cool cool cool! Bests thing I did for my car. :)

http://home.dejazzd.com/danf/cars/IMG_1412.gif

I agree with Renagade! Just a blast!

I think they look really cool on big block chevy's and Hemi's BUT not on small blocks, they look almost awkward. And in my humble ass opinion if youve got a blower, and arent running at least 10 second ET's, then you wasted your money or you have way to tame of a combo. But you can allways have a good WOW factor.
I personally would much rather have a pro charger on my car though, in fact im seriously concidering dropping back on compression and pro charging my Nova {D1SC+innerooler} as a reward when i get my electricians licence!!!YEAH!!!

..... if youve got a blower, and arent running at least 10 second ET's, then you wasted your money or you have way to tame of a combo. I agree with this^ quoted statement above as long as we're talkig about a blower that sticks out of the hood. But there are smaller roots blowers that don't require a hole in the hood, and are stealth (such as the Eaton M112 blower like I have on my 4,200 LB 12 second daily driver) which typically are used for modern small blocks to get them into the 12 second brackets on pump gas, and I don't see anything wrong with that. I know that blowers like those aren't the main focus of this thread, but I just wanted to point that out since a couple people here have mentioned centrifugal S/Cers which are also used a lot for daily drivers with small blocks to get them into the 12's.

14 psi of total boost. around 5-6 @ 3500.

Pump Gas. No N20.

Will be N20 this year. Its a little to streetable... just 1015hp@6100 rpm. And 6600 max rpm.

So we ordered a gear set with 3.73 for our 33" tires to get lower RPM.s and then we will add 200-300 shot of N20 to go faster.

This is a tube car. But full street trim. will be competing in www.kingofeurope.net Cool....thanks for the info.....

how can somthing thats been proven for decades and is still used on most (?) pro drag cars not be cool? imagine how a top fueler would fare w/o a blower...besides the fact that they can/could be snatched off old school buses

A topfuel car with a Screw, Radial Compressor or Turbos will go faster.

A topfuel car with a Screw, Radial Compressor or Turbos will go faster.

Faster MPH...Maybe. Faster ET....No way. If they could lay down a faster ET, then you could bet that everyone would be doing it.

Faster MPH...Maybe. Faster ET....No way. If they could lay down a faster ET, then you could bet that everyone would be doing it.

Its not legal to do so...

There was other superchargers that was superior. Then they wrote rules.

Same in ProMod. No screws/Turbos.

Or is it a Turbo option Open now again?

WOW interesting reading....
He is my take on the Roots blowers....They are awesome to look at and hear run, Who gives a whoot about how much power they make!
How many of you guys have "loud" mufflers or big tires or big "lumpy" cam or dual 3" exhaust pipes on a 300HP or less motor...is that stupid???...Absolutely not, because that is what the car owner wants his/her ride to look/sound like! Why put a 400hp BB in your ride when a 400hp SB is lighter....I like the look of a BB so that is what I am doing (450hp).
Build it like you want and who cares that your blown BB "only" makes 650hp!

Jody,

Question for you??

Can I get buy running a 256 Mini-Supercharger making 8 pounds of boost on my about 9.8 to 1 CR., 496 burning 91 octane using my stock points distributor??

I would change cams to say the old Crane CC-290-NC Commander on wide centers tho..

I ask b/c waaay back there, you said that the beauty of a blown engine is the ability to still run pump gas under boost.. OR are you pulling timing out under full boost by using an electronic ignition system so that you can still run GOOD pump gas??

pdq67

They are awesome :thumbsup:

Blowers are Cool! There is nothing stupid about them, they do cost more than Nitrous, but if someone runs nitrous for 20 years, and goes through a few 10 pound bottles a month, at 3.00 a pound (around here) that adds up. we have ran superchargers since i was 5, (17 now) still have the first one we bought 12 years ago, and staight up it puts out 12lbs of boost, with just changing gear lube(thats it, no new bearings, or parts). Had it in my 454 chevelle, with stock tires, like driving on ice all the time, massive horsepower. Its the only way to fly, and you can drive them most of the year, very reliable. we have a 6-71, and two 14's, there unbelieveable.

I would recommend it to any one, easier to run on methanol, than pump gas though.

blowers are sweet . they are soo freakin intimidating. nobaody want to race when you pull up and everybody sees your ride with a blower in it. like the other day i was cruising in my 69 elky, and i stop at a light. by chance another 69 ss cruises on by, with huge slicks in the back and a very nice looking blower poppin out of the hood. it was sweet.

I like anykind of blower I can fit UNDER the hood. I've had great luck building cars with Vortech blowers and I'm thinking of trying a Mini roots on my 70' Malibu. I like the blower whine but its even better to keep people guessing what you have UNDER the hood and not sticking out ABOVE the hood. At local car cruises I get ALOT of people asking/telling me it my Alternator or waterpump is bad on my Thunderbird, I just smile and nod.

I was considering buying one last week. It was a used 6-71 that was complete for around $1000. After doing some research and talking to people I found that they can be tricky to set up and tune for a street/strip application. They seem to have a alot use in the boating community because they can use the lake water to use a intercooler and they don't have any height restrictions in terms of hood clearance..

An indicator that they are in a decline is there isn't much info on them. There seem to be only 2 books published about them. The thing as they become somewhat "obsolete"" perhaps the price will drop it will be worth taking a chance on them.

I think in the looks department they are awesome. When I first saw the used blower standing there it was like seeing a beautiful naked lady with an awesome "set of headlights".'I think if I had the $1000 on me at that point in time I would have bought it on looks alone. Rational thought prevailed and I am instead investing more money to get the Monte on the road.

We just put a Weiand 8-71 on our 454 crate motor and made 750 hp on pump gas, with over 700 lb-ft everywhere you looked. Every time we test blowers they make killer power, but you hardly ever see them on the street any more becuase of the Pro Street stigma.

So tell me, are Roots blowers cool or stupid?

DF

cool only if the car can use the power..
if it can't hook and runs 13's with 700 lb-ft everywhere in the powerband
it's um stupid..
around here they don't because of tickets (obstrutive view)
and paxton etc you can hide what you're packin'
from the cops/the thieves/and other street racers...

cool worked on mine this weekend see. http://i31.photobucket.com/albums/c389/hotrodmanIII/100_147968FTBLOWER.jpg

Saaweeet!

Saaweeet!thanks http://i31.photobucket.com/albums/c389/hotrodmanIII/100_1478BLOWERPICPASSSIDE.jpg

this is the waY we all want to see one right .??http://i31.photobucket.com/albums/c389/hotrodmanIII/100_1481BLOWERFROMINCAR.jpg

Awesome looking combo b/a! Seeing as how my car has a similar(not as shiny and new though) look to yours, I'm going to have to say roots blowers are cool!

cool only if the car can use the power..
if it can't hook and runs 13's with 700 lb-ft everywhere in the powerband
it's um stupid..
around here they don't because of tickets (obstrutive view)
and paxton etc you can hide what you're packin'
from the cops/the thieves/and other street racers...

Hi bowtie, where are you from that the police don't like those blowers? I would definitely classify for the "rust-belt", hahaha. I sent some pics of my car to friends in the police dept., they didn't think it would be an issue. But that's friends, not a stranger who doesn't know me and might not like the look of me or my car, so it will depend on the situation I guess.

My only hesitation with this setup was the attention it would get, but the car already looked wild so I figured I might as well complete the picture...

this is my chevellehttp://myspace-708.vo.llnwd.net/00383/80/70/383750708_m.jpg
this is my 496 thats going into the chevelle this weekend
http://myspace-660.vo.llnwd.net/00393/06/61/393891660_m.jpg

I have had some real problems with cops who "did not like" my car. And it DID NOT have a blower sticking out the hood. I would prpbably be doing hard time by now if I had an 8-71. I love the things, theyre bad ass(if set up right), but I do admit that they are less efficent that turbos (my next project) and therefore dont make as much peak power.
Turbochargers and centrifugals also can be real turds when not set up right, i have experienced lazy turbos and problematic centrifugals before, so they are not nessesarily the perfect solution either.

personally i think its because more people are going for the LESS is more look. nothing like having 396 badges with a 700HP ,normally aspirated 572 underhood. the rest of the country does not enjoy the same year round wheather as southern Cali does either. JMO,, DAVE

SinceStupid is not an option! I voted Cool
Five easy steps to Cool:
1. gut car
2. tub ass-end
3. find monster BB
4. install big-ass-blower
5. find buddy to ride shotgun for making right hand turns :D

i had a mild small block chevey in a 66 olds 442 with a 671 bds blower and is ran alwsome.7.00 in the 8th in a 3750 pound car

roots blowers are way cool but putting a pro-charger on my chevelle

I had 2 altercations with police last year.
one guy tailed me than pulled along side for a while and signaled to me. I tried to ignore him, but he tried earnestly to flag me. When I looked over he gave me a big thumbs up and a smile.

Second cop stepped out onto the street as I was coming up to a light. He came up to my window and blurted that the car was obviously illegal and that I should follow his cruiser back to his home, leave the car in his driveway with the keys in it. Then he said, "I love your car, man" and stopped traffic so I could go through the intersection.

I'm with stupid => http://memimage.cardomain.net/member_images/5/web/689000-689999/689541_25_full.jpg

That's just plain SICK!

i pretty much agree with everyone. i have a 454 that i have been thinking of adding a roots to it. but like everyone says they are so hard to dial in. but i kinda like the attention and I LOVE THE SOUND AND LOOK. but that's me. that hemi looks awesome nice setup.

that 355 is bad a$$ man

406 monte, I am not sure who told you they were hard to dial in. Thay are not hard to tune at all. They are trouble free and make TONS of torque.

In fact, a blown motor is easier to dial in and they cover up the flaws in parts selection such as too big a cam, too small heads, or too rich jetting. They also start easier/ faster. My blown motors usually snap to life with half a crank of the starter whereas a NA motor may take a crank or two. They make a motor more effient.. ie. increase volumetric efficiency.

Just dont let the motor run lean or detonate..and roots blown motors are almost brainless to go fast all day with.

What kind of mileage could you eek out of a mild engine with a small roots? I'm trying to find a way to increase the mileage in a 77 dual cab truck, right now it has a 383 that only gets about 10mph. I was thinking about building a 327 or 350 with a very mild cam and small under hood blower. All the torque, more power, but fewer cubes to feed and maybe some better mileage because of it. Am I out of my mind or not?

I doubt you will gain mileage by going with a smaller engine and a blower. The smaller engine will have to work harder to do the same work as the larger one. Adding a blower is not going to increase mileage. It takes fuel to make power, blown or not. A blower just allows an engine to ingest more fuel than it could naturally. The smaller engine with a blower will probably net you about the same mileage as the larger engine. I would venture to say adding the blower to the larger engine would be the best bet.

It doesn't get any better than driving a blown Chevelle. :)

http://www.chevelles.com/forums/attachment.php?attachmentid=2684&d=1148315469

Just to add to the cool factor, i was coming from DC to philly, just to get some cheesteaks...its a random college thing me and my buddie did! Anyways, on I-95, all of a sudden, traffic came from like 75 to 50-55, but no cops or accidents. As we finally make it past, and im yellin at everyone to stop slowin down, i see a 67(i think) corvette, with huge blower sticking up into the sky, so now i have to slow down as well, just to admire and dream of having one on my chevelle.....the moral of this story...If you can slow traffic by almost 30 miles n hr on I-95!, just by driving your car with a blower....then its gotta be BADD ASSS!

Wish i could do it on my tahoe that i was in!

It doesn't get any better than driving a blown Chevelle. :)

http://www.chevelles.com/forums/attachment.php?attachmentid=2684&d=1148315469

I'll happily second that! :thumbsup: IMHO, blowers are for keeps.

I totally agree nothing worse than seeing a roots sticking out of the hood and not making much power, just eye candy.When i built my 468 blower motor i wanted power but totally lost my streetability. then i found EFI didnt lose any power (actually gained more ) and my wife can drive it to the grocery without me worried about problems. technology is a great thing it just took a few years and a lot of extra cash! But hey it was my 1st car and me and my wife drive it whenever we can and rain is permitting i like keeping it clean anyway HA HA

.... then i found EFI didnt lose any power (actually gained more ) and my wife can drive it to the grocery without me worried about problems. You have a private message.

Huffers RULE!

I totally agree nothing worse than seeing a roots sticking out of the hood and not making much power, just eye candy.When i built my 468 blower motor i wanted power but totally lost my streetability.

Not making much power? Maybe there was something wrong with your initial setup. Did you have much time to tune it? EFI is THE trick for blowers but carbs work just fine for the street as well.

they rule! IMO there is no better symbol of American horse power than a roots. i agree that the stigma of the pro-street ,all show no go cars sucks,but being able to waste one of those giga-buck wuss mobiles with a properly set up blown home built street car will always be cool. when i do the 496 crank in my car ,i plan to add a Weiand 177 Street blower . it should make 475 HP and 550 TQ all day long on pump gas without ever breaking a sweat and be completely streetable. anyone who thinks that roots blowers aren't cool needs to be slapped every 5 seconds (like chinese water torture) while being forced to watch Road Warrior until they see the light !!!

Quick70,

if you lost streetability with the new blower motor, it was not the blower. There must be something very, very wrong with the set up. Usually you can even stick too big a cam in there and the blower will smooth things right out.

Way Cool! but personally I would rather have a really fast car on all motor

who in their rite mind would do something like that? http://img107.imageshack.us/img107/1429/skinscar14ps.th.jpg (http://img107.imageshack.us/my.php?image=skinscar14ps.jpg)

Way Cool! but personally I would rather have a really fast car on all motor


That is the thing.... you cannot have a really fast STREETABLE boat ancor Chevelle on just motor, that is why the fast street cars are all blown in some sort or another.

So how fast is a FAST Streetcar in US?

Mid 8? Low 8? High 7ens?

The first two is obtainable with an NA motor. the last one will have some sort of boost...

You cannot go 8's in a car that can drive cross country reliably without some type of power adder. There might be a few in the world..... MAYBE.

Realisticly a "fast" street car now adays is a 10.00 car I would say, That is something you could drive around in without much fear of a loss.

That is the thing.... you cannot have a really fast STREETABLE boat ancor Chevelle on just motor, that is why the fast street cars are all blown in some sort or another.
If you want a nice tractable, streetable combo that passes gas stations, can be driven by the wife, is super fun and reliable, then you pretty much have to assist it. I got 675 n/a hp under the hood, small cubes, and it is kind of a bear to drive. Lots of fun, but 10 mpg's, and you always cary your tools. Don't run out of avgas, 'cause you can't get any at the local station. Pita.
But fun.

That is the thing.... you cannot have a really fast STREETABLE boat ancor Chevelle on just motor, that is why the fast street cars are all blown in some sort or another.I'm not sure that I agree with that, but I sure hope that you're wrong. I'm going to try and have a street car on all motor with my current 70 Chevelle project which includes an 800 HP naturally aspirated 632 inch pump gas engine. Granted it will get terrible gas mileage, but it should be good for low 10's or even high 9's at the track, and the emphasis will be street driving. In fact, the peak power comes in at 5,900 RPM, and the peak torque at 4,000 RPM, and the stall speed I've chosen is only 3,200 RPM since the engine already makes 715 FT/LBS of torque by 3,000 RPM.

wish i could use a screw charger with carb. i love the ls1 kenne bell chargers.

I agree with a post above. Seems like the guys around here I see with big blowers at the track are the ones driving around the pits swollen up like banty roosters and then either don't run them on the track, or do run and don't know how to handle the power.

Having said that, to each his own. I prefer seeing a car with a factory cowl hood and DOT tires running 9's. To me, thats cool.

What ever happened to Latham Superchargers???

They were going to lost wax cast the turbine sections to cheapen them up vs machining them, but I never did hear anymore about how it turned out??

And onna them WOULD fit under a flat hood!!

pdq67

wish i could use a screw charger with carb. i love the ls1 kenne bell chargers.

Whipple has carb kits: http://www.whipplesuperchargers.com/products.asp?CatID=44&DisplayCat=0

LS1 Kenne Bells have turned some insane #s. 800rwhp 850 rwtq

http://forums.corvetteforum.com/showthread.php?t=1468770&highlight=402

Nothing wrong with a roots I just do not want to cut the hood.

IMO the only time they're cool is when you have a 9 second time slip in the car to back up the looks :). Most of them are posers.

hey.. I see just as many posers with nitrous, tunnel rams, full back halfs, on cars that have never seen the track.

Last month was a classic..guy had a 632 BBC with twin EFI throttle bodies on a hand fabbed aluminum tunnel ram intake from Hogan. Guy said it has never been to the track and didnt have any plans. Is he a poser?

I guess it has it's place, and they are cool in certain situations... but to me, a street driven car, it just kills the appearance usually. I can't stand to see a hacked up hood with a goofy air cleaner that looks like a mechanical E.T. sticking out of there. Not because of the metal getting hacked up, because I feel the same way with glass hoods to. It's just how it kills the lines of the car.

i thought i saw a blurb about a new super charger technology that won the S.E.M.A. show "new product of the year" award, that was going to take the world by storm...what was it and why havent i read anything more about it?...anyone?

"A topfuel car with a Screw, Radial Compressor or Turbos will go faster"...so, whats the deal?...are roots type blowers are the only thing (as far as super chargers) that are legal in NHRA top fuel and funny car racing?

I love that this thread just will not die. It's over two years old!

DF

I personally do not like the big roots blowers....I want my power hidden so when I blow the doors off of some 3000gt or supra they dont know what hit them

except some of those cars are extremely fast and could actually proabably run with my car

well i just about have this finished. it's going into a street legal backhalved 75 vette. i havent done much at the track since i got rid of my bracket bike but i'm hoping to have some fun when this is done. eventually. not the cheapest project i have ever tried. oh guess how i voted.
http://img.photobucket.com/albums/v478/panchop/MVC-858F.jpg
A year later, and progressing slowley i still vote cool. :D
http://img.photobucket.com/albums/v478/panchop/MVC-112F.jpg

I run a roots on my '66 and there's nothing like it. People stop in amazement, give me the thumbs up everywhere, and the kids stare at it like it's a UFO. I feel like Ricky Bobby when I take her to Home Depot.

It's not about time slips for me. I drive it to the grocery store every Sunday, pick up DVD's at Hollywood Video, grab 20-packs at AM/PM, and every other excuse I can find to fire her up. Cops don't hassle me, and it puts a smile on everyone's face that's over 30. The bottom line is people just dig it, and I like reminding people that muscle cars are still around and going strong.

I like being able to run on pump gas, and have an excuse for my engine to stick through the hood. I'm fairly certain that I could go just as fast with a single carb in the right setup, but it just wouldn't be the same, and it surely wouldn't get the same attention. Make no mistake, blowers work, and the technology is pretty straightforward. Nothing new either. I must be pushing over 600hp underdriven on a bad day, so it's never embarrassing, and always respectable, even in a car that rarely sees the track. No fancy head work, no lumpy cam, and no high octane fuel required. Don't get me wrong, it's not a daily driver at 5-6mpg, but it certainly gets it's time in on the weekends. Like someone said earlier, roots blowers are the American dream of muscle cars. Drive one around and find out for yourself.

http://pics.ramanon.com/albums/userpics/10015/Chevelle%20066%20900%7E6.jpg

SoCal Bryan,
That car is freakin Beautiful. :beers: Blower cars are attention hogs :D

http://memimage.cardomain.net/member_images/5/web/689000-689999/689541_14_full.jpg

http://memimage.cardomain.net/member_images/5/web/689000-689999/689541_41_full.jpg

http://memimage.cardomain.net/member_images/5/web/689000-689999/689541_24_full.jpg

I am not into sneaking up behind pimple-face ricers and blowing their doors off street racing with a stealth machine. Street racing a stealth machine is no more practical than having a big blower sticking out of the hood. My little 355 with mild cam and 14 pounds of boost makes more power/ torque than my 10" slicks can handle, I cruise at 1800 on the highway, I get 18mpg, the blower is no more practical than having this much power with a stick, but I have all the sounds and sensations of manually shifting a whining, bellowing performance machine, that still has the street manners of a stocker (albeit the huge power difference), that makes this car a thrill drive.. it is just a weekend toy. I would never get that thrill driving a plane Jane with a hyper-540 BBC hidden under the hood.

Skeeveman: does it really kill the appearance? and there is a whole lot more to look at when you pop the hood. There is usually not much to look at and get excited about when looking at another 4 barrel NA motor.

If I built a pure drag race car, I would prefer the 540 BBC with a single 4 barrel and an automatic trans.

I like some cars with roots and others not....some like Tokyo's camaro there flow nice and I like that car....but say like a 65 chevelle....i dont think that would look as good

cool

Rob

Hey Tokyo's - When did the car change colors?? Looks good. I agree with Tokyo's statement - Pulling up to a light and having that blower whine is just awsome!!!!!!!!! I am just getting mine on the road and having a blast with it.

After almost 12 years of running a blower I can still say I have no plans of going back to N/A. I am, however, thinking about changing things up for '07.

After some careful measuring and with some slight modification and fab work I think I'm going to try to stuff everything under a 4.5-5.00" cowl hood. The old 2.5" Unlimited hood that's been on my car scince '92 is slowly destroying itself and becoming an eyesore. The BDS scoop will go (kinda tired of that look anyway) and I'll fab up a carb pan to the the cowl opening.

Stay tuned.

Chevelle 6-71: the color has not changed. It is a pearl so it changes hue with the light.

10sec69: Put it all inder a tall cowl? are you thinking about efi? or side draft carbs? I would also prefer to have less height and have looked at efi, but from talking to those who already tried it, I do not have confidence in the current blower efi being sold.

I think blower cars start to seem silly when I see a huge shot gun air scoop on top, then I see stock, small port cast iron heads, small tube headers, a severely under-driven pulley set up with very low boost, and an owner that doesnt have any idea what his cam specs are. This is a waste of a good blower. The worst are the cars that I have seen with 2 6-71 blowers on a single intake.

[QUOTE=Tokyo Torquer;1120352]Chevelle 6-71: the color has not changed. It is a pearl so it changes hue with the light.[QUOTE]

Well that's bad azz ..........

http://memimage.cardomain.net/member_images/5/web/689000-689999/689541_14_full.jpg

Nice looking 2nd gen. I'd love to have an early 30s Street Rod with a 6-71 sitting on top. The blower does look evil.

10sec69: Put it all inder a tall cowl? are you thinking about efi? or side draft carbs?

Nope. Keeping the same carbs. I think the Chevelle engine bay's a little deeper than your Camaro so it's an easier fit. I have 1" carb spacers that can come out and I use a BDS carb adapter that's very short. I also have the choke horns milled off.

I borrowed a friend's 4.5" Harwood hood to do a test fit and it did fit (closely!) It was even a "Show" hood that had the finished inside layer. I'm looking at the 5" Glasstek which doesn't have the inner skin and that should give me more than enough room. Actually, it's only close at the very front edge of the front carb... the back carb has a couple of inches over it. As I said, I'll fab up a pan that seals to the hood and incorporates some sort of filter back at the cowl opening.

I've never seen this done but it should be slick!

Jim,

Don Hampton's son had a 6-71 and a single carb under the cowl of a 63 Nova..

http://www.hamptonblowers.com/wesnova.JPG

http://www.hamptonblowers.com/1novaeng.jpg

That 1" carb spacer provides the clearance for your side saddle carb linkage and fuel lines..won't they hit the blower if you remove them?

Good luck.

Go to StreetCarForums,South East area,Cumberland section,Bounty race photos,page two,S-10 trucks,with 177 weiand superchargers,low 6 sec.1/8 mile times.
You tell me if they are cool.

I think they are cool as hell. Definitely expensive but everything dealing with hotrodding is anymore. I just love the sound of that blower at the track when someone is hammering the throttle.

I bought my 671 from a guy who had it on a mini pulling tractor pushing 30 lbs of boost for $1000.00 bought an alum. adaptor for 2 carbs, bolted it on a STOCK 350, put in a 488 114 lobe center cam, dressed it up with a little chrome, and have been driving it everywhere, any time, and any weather with no problem for several years all while making 10 lbs of boost. And at WOT you had better hang on. The reason most people think blowers are finicky or unreliable is because they HEARD about it or they just plain don't understand blowers. Actually a blower is easier on a street driven engine than high compression and you can run 87 gas with no problem but they WILL make the engine run hotter, not due to boost as many people believe, but mostly due to the engine pulling the blower, It takes 15-20 hp just to turn it at idle. As for wallet friendly on saturday night, it's not, a full tank of fuel will get about 3 hrs cruising or about 5 mpg highway. Oh yeah, blowers are cool. :cool:

but my 6-71 blown 355 with 14 pounds of boost is getting 18mpg with 2 carbs when cruising! This is the benefit of making power with boost on a little engine.

Wow thats strange,'cause we've got the same rear end and gearing. Maybe its the carbs? Mine runs VERY rich at low rpm due to duel webber 650's, but that's the way I want it 'cause as you know they lean out in a hurry at WOT. But then again you've got 750's so I'll play with the overdrive and see what happens. It could be too much for the nearly stock 350.:beers:

I'll admit I did'nt read all 5 pages of this but, I still have a question...

How much weight does a typical 6-71 or 8-71 setup add?

They are heavy as heck..over 100 pounds. With 2 carbs on there, even heavier. One man cannot bend over a car front fender and place it carefully on the intake gasket. I use a hoist to put it on. Some (many) cars will need heavier front springs.

Bad66, you need to lean out your air screws/ low speed circuits. They arent going to help you at WOT. I have drilled out jets for a fairly rich WOT setting, but tune the air screws for about 14:1 AFR at idle. I have a wide band AFR meter to confirm.

Torquer, your exactly right ,these are out of the box carbs and you don't want to stand behind it long when its idiling. A friend of mine has a meter so I'll do that soon,thanks

i have no regrets about my blower, more money is involved but to feel the power man what a rush, just hate to see a blower under driven, if you spend that kind of money pump it up!

I've always wanted to build a blown motor! Since I was a kid! But I think what happens is that we all only have so much money in the "real world". So if they really must have one. They buy one and try to adapt it to a stock compression engine. (put all their money up top and nuthin left for underneath) If you do it right and build it from the ground up taking into consideration that it will be blown, and low compression so you can actually use the blowers ability too pump a much larger combustion cavity full. You will make unbelievable power!! But you will need boatloads of money, and most of us can get farther running normally aspirated for a lot less money. I mean who's gonna make the house payment? Then again hmmmmmmmm maybe someday..... Bill

I hear ya..... Blown motors can get real expensive real quick. It is funny though - My car has been on the road a few weeks now and the other day my wife asked me when she could expect the s...eating' grin to come off my face. :D I will never look back......Blown motors rock!

I have a 6-71 blown 433 in my 65 vette. I did it for the nostalgic hot rod look. There are certainly better ways to make HP but few draw looks like a blower stiking through the hood.

http://zl1power.com/65motor.jpg

i couldnt afford the bigger blower i.e 6-71 or all the other things you have to do to your motor to make it worthy of one, but i did get me a baby blower i have a weiand 177 c.i blower with a single hp 950 alcohol carb on my little 383 c.i. small block in my 1971 chevelle that has all the attitude that i want. i drive it to cruise ins and car shows it is a all steel street car with the exception of the 6 inch fiberglass cowl induction hood, mufflers,3680 lbs of good ole fashioned, get in sit down shut up and hold on attitude. my blower is a under the hood type and i love it when i pull up next to those full blown race cars at the track ( tube chassis, fat tires,big blocks,and open headers ) and here i sit in my street car with mufflers and beat them to the other end, i have had many,many people come over after i beat them and say...oh hell and it is a small block to boot.......that is priceless. best e.t to date is a 9.63@ only 129 at 7 p.s.i of boost shutting it off at 1000 foot due to manual drum brakes on all 4 corners...here is a couple pics of my car......Mike
http://i128.photobucket.com/albums/p184/fast1971chevelle/mcar5.jpg

http://i128.photobucket.com/albums/p184/fast1971chevelle/launch1.jpg

Just make sure if you get one that you know how to race them because you wanna show thoose imports that blowers still rule of turbos with their big .... s wastegates. (of course do not get out of first or they wont be able to see you any more) hahaha

roots blower sticking thru the hood attracts cops like a brothel giving out free narcotics run by a guy advertizing hes against cops wearing bullet proof vests or being armed.
if its under a hood thats a totally differant deal,
I have several friends , with roots blowers,and those that stick thru the hood, they all get followed by cops frequently.
now the cops might just want to look over a cool car......but being given a police escort you didn,t intend to have sucks

That's why ya get a big hood.

Well mine is 100% street legal and if they want to escort me all over town they can. :D I have been pulled over three times so far and two just wanted to look at the car. We have fairly cool cops around here. Except for a few :mad:

Most people around here with roots blowers have been told that if they are seen on the road their car will be impounded and the fines could total over $10,000. That is why I have not done the full on pro-street treatment to my S-10 Blazer.

wow knudsonm must suck to live where you live at, by the way where in the hell do you live at?.......Mike

No matter how you slice it...blowers are cool. Grassroots, Raw, In-Your-Face, it's what I got do you want some (?) power. High tech? Naaaah! Efficient? Naaaaah! Easy? Naaaaah! Pure Cool? Yeah!!!! Only foks not likin' the blowers would ask for iPods, Blackberries and Radio Shack gift certificates for Christmas!!!! Not cool!!!

Most people around here with roots blowers have been told that if they are seen on the road their car will be impounded and the fines could total over $10,000. That is why I have not done the full on pro-street treatment to my S-10 Blazer.

Hard time believing that. If that's the case you live in a place even more tight-puckered than Massachusetts which is raaaaare!!! Would guess those warnings were more for the specific PERSON and not the blower installed on the car. Next time the "escort" shuffles in behind ya' just pull it right over and ask them if they would like to taka a looksy.

No matter how you slice it...blowers are cool. Grassroots, Raw, In-Your-Face, it's what I got do you want some (?) power. High tech? Naaaah! Efficient? Naaaaah! Easy? Naaaaah! Pure Cool? Yeah!!!! Only foks not likin' the blowers would ask for iPods, Blackberries and Radio Shack gift certificates for Christmas!!!! Not cool!!!
:thumbsup:
They are also cool enough to keep this topic going since 2004

Hey, ya'll northern boys need to come on down to the big Houston area to cruise around, hassle free. The police DO NOT mess with blown cars in these parts. They will give you a second look but keep the loud pedal quiet and there's no issue...they're probably too busy chasing after our Katrina thugs!

I dig that burnout vid blown70! Nice job... :cool:

I dig that burnout vid blown70! Nice job... :cool:

Thanx...I dig'd doin it!:beers:

Most people around here with roots blowers have been told that if they are seen on the road their car will be impounded and the fines could total over $10,000. That is why I have not done the full on pro-street treatment to my S-10 Blazer.

Is that your S-10 over at Van Handels? If it is, you have a very cool ride.

Bill

I live in a small populated city thats a big agruculture area which has alot of back open roads of just fields! I love where I live for that reason cause I have alot of freedom and can floor it when ever I want. Most big cities you can't do that....:sad:

I have been running this 8-71 for 8 years now and wouldn't go back to nitrous or naturally aspirated.
I am just finishing up my 540
http://i17.tinypic.com/48bxnjb.jpg

Cooler than the other side of the pillow!
http://img.photobucket.com/albums/v216/mutfish/Picture089.jpg

i love em' and i wanted 1 for as long as i could remember when growin up watching madmax.

wow 14 pages!...ahhh come on roots blowers are for the guys who are the attention whores....ohhhhhhhh look at me i have a loud whinning blower....i have a 3000.00 plus power adder....and then you get the ******* that has nitrous on top of the blower....i mean come on...that guy has issues...

oh wait that guy is ME!

friggin roots blowers rock!.....406,871 tefloned littlefeild,702 on the dyno,200 shot of spray (just got it)..whinning, hear me from a mile away FUN!..

GPCMALIBU: I am thinking of a 406 for my next blower build with a Dart block. I always shyed away from the stock block for a blower build in the past, but would feel comfortable with the Dart block and MLS gaskets with the cylinder bores being so close together. What are the details of your build to make that 702 HP? at what rpm? torque? heads, cam, boost, etc? What did it dyno without the nitrous shot?

thanks

having big block very soon and cabt decide on what blower to use

i would like it to fit uder the hoo but everyone says a 177 wont do anything on a 496?

i have 320 cc aluminum heads
4 bolt block
solid roller cam ad lifters

wich blower to use.
this isnt a track car, wife wats to drive it....once or twice
want enough power to go into the 9`s, ill get it to hook

this isnt a track card but a weekend toy fir me and the wife and kids

will a 177 be able to make over 700hp on a 496 in a 1987 oldsmobile 442 its not a heavy car car will have 2" headers i have 3" exhaust th400 with brake now

or is the 8-71 the only way to go?

does anyone here run a 177 on a 496?

I feel the 8-71 is the way to go. I have one on my 540 and would upgrade to a 10-71 if one came available and I could swap with a little cash.
I ran the 8-71 on my 460 and it put out 9 or 10 pounds of boost off the light with little throttle opening.
I like to overdrive my blowers for down end grunt and then limit the rpm to protect against overblowing. I use to run 11% overdrive, right now I am switching pulleys to run 27%

I feel the 8-71 is the way to go. I have one on my 540 and would upgrade to a 10-71 if one came available and I could swap with a little cash.
I ran the 8-71 on my 460 and it put out 9 or 10 pounds of boost off the light with little throttle opening.
I like to overdrive my blowers for down end grunt and then limit the rpm to protect against overblowing. I use to run 11% overdrive, right now I am switching pulleys to run 27%

i like the guy with th esilver chevelle running mid 9`s with a small weiand,,,,

is anyone here running a 177 on a BBC 454 396 496 402....etc??

im just waderig if its worth the $2500 for it plus carbs and this ad that compared to a nitrous setup wich i have pretty much everythi g i need
im convincing myself to go nitrous and tune it for all motor then =hit it

Here's my 85 Monte SS engine. It is a street driver that runs 10.70 in the quarter. I run dual 1150 Dominators on my 359CI small block and do great in commute traffic!

http://groups.msn.com/_Secure/0WwBZD1oaCI3rJWnGdj9ws6v00Gs73IqBQpjcGmzDWSNgatEHz !nB4juCOSjLNEtDYmhsts1WWGyB00u2Y7nTa61YYBy7nOuSnFb 2ajQne1heiwAfN18aN9D07xmovvZjGfc!JWj5890/P?dc=4675634427554483215

Russ,

I would like to hear more about your car. I noted that you were initially going 11.8's @ 116 on that motor and got it down to 10'7s. What is the motor build (compression/boost/cam specs/heads/etc)? What does the car weigh? I see you initially had a single 4-barrel on the blower. Why such huge twin carbs on the 358ci, now?

I still struggling to get down the track in a straight line on my blown 355 and would like to bench mark your build and experience.

thanks,

mike

Russ,

I would like to hear more about your car. I noted that you were initially going 11.8's @ 116 on that motor and got it down to 10'7s. What is the motor build (compression/boost/cam specs/heads/etc)? What does the car weigh? I see you initially had a single 4-barrel on the blower. Why such huge twin carbs on the 358ci, now?

I still struggling to get down the track in a straight line on my blown 355 and would like to bench mark your build and experience.

thanks,

mike

:waving:ME TOO! Im curious myself on the above questions too.

Great looking motor BTW!:thumbsup: Those are some beautiful painted valve covers.

There is way too much for me to try and remember but it is mostly all on my Monte Web Site
here http://groups.msn.com/RamAirMonteCarloSS/shoebox.msnw?albumlist=2

click on the dropdown window where the page number is to change pages.
Basics are 7.8 compression, canfield 215 heads, solid cam, th400 with brake and 3000 stall. BFG 275/60 drag radials. Specs are all on my site - tons of info, it is my diary of my build. One carb was just too small so the duals went on. I am sure I could make the same power with a pair of 750 Doubles but like the dominators.

I ran a 6-71 on a 350 for 4 yrs on the street in my 81 tubbed vette. Way cool. Thing ran low tens. ck it out www.warlockdragracingteam.20m.com
Anyway, I'm looking for a 66-67 chevelle. I have a 462.5 cu/in bbc with a Isky Hdy/Rlr 578/603 lift. I will run a Weiand 177 under the hood. These little rascals will hold their own with an 8-71 up to 5000rpm. Perfect for the street. Blowers are just cool. Huffer's forever!!!

Well I just puchased my 8-71. so I say way cool. I will be posting on my build soon when I get a little more time and parts.

Milan

Russ

what is the weight on your car and how many pounds of boost are you running?

Just in case someone out there hasn't seen it :wacko:
http://i233.photobucket.com/albums/ee156/psiwog/blown-chevy.jpg

My 85 Monte is about 3800 lbs with me in it. I now run 10.5 psi boost and 9:1 static. I finally picked up a 66 Chevelle SS and am putting the Monte's running gear into it. I have been considering Procharging it to keep it under the hood but this discussion thread has me remembering why I have a roots blower in the first place. Even if I can go faster with the Procharger and an intercooler their is no denying the cool factor of my 6-71 and dual dominators. I will try to fit it under a 4" cowl and see how that goes.. I think a 66 Chevelle with 700HP and TH400 with gear vendors and 3:50 geared 9" should do the trick for a mean street cruiser. My biggest problem is finding something better than a detroit locker for the 9". I think it is too noisy and have heard stories of them failing. I do not want to run a spool on the street. If anyone knows of another alternative differential please let me know.

Ancient thread alert. ;)

Ancient thread alert. ;)

old cool threads are good to bring back ! and roots blowers are way cool and work.