Dont do it.

Did that work? 😁

 

A feeble attempt at best🤣

 

They do look awesome. They sound awesome. I think you should do it. You can always take it off and sell it if you decide you don't like it.

 

always wanted a blower motor since 1980, never go around to building one.
Found a decent price on a new in box 8-71 and was thinking of picking it up.
The build would be a mild one, more show then go and aiming for 10s in a 3400 lb car.

besides not being able to see around the thing ( and the price) what are the draw backs for a grocery getting blown BBC ?

Here you go, I shall try to talk you out of it.

<crickets>

 

I think the biggest draw back would be cutting the hole in the hood. That's pretty permanent. Visibility will certainly be reduced. Blowers are heavy, at about 100 lbs. The street roots blowers aren't very efficient and create a lot of heat. So pump gas builds can't run much boost.

The pros are they are damn cool. Even if it only makes 650 hp, it's instant tire shredding power. I say go for it!

 

I think the biggest draw back would be cutting the hole in the hood. That's pretty permanent. Visibility will certainly be reduced. Blowers are heavy, at about 100 lbs. The street roots blowers aren't very efficient and create a lot of heat. So pump gas builds can't run much boost.

The pros are they are damn cool. Even if it only makes 650 hp, it's instant tire shredding power. I say go for it!

Roadkill the hood.

Step 1: Remove current good hood. Put in safe place
Step 2: Find "decent" old hood.
Step 3: Cut hole in it
Step 4: Spray-bomb it flat black
Step 5: Install spray-bomb hood.
Step 6: Enjoy the smiles per mile.

 

Yeah, you don't want to do that. If you're going to do it do it big with a 14/71!!!! I always wanted a car with a roots blower on it. I ended up going with an F2 Procharger to keep it under the hood. I say do it!!!!

 

always wanted a blower motor since 1980, never go around to building one.
Found a decent price on a new in box 8-71 and was thinking of picking it up.
The build would be a mild one, more show then go and aiming for 10s in a 3400 lb car.

besides not being able to see around the thing ( and the price) what are the draw backs for a grocery getting blown BBC ?

Not a drawback, but we only live so long. You got the dough!? Jumpmaster says HOOK UP, SHUFFLE.... and JUMP! Be careful what you wish for, but wish on!

 

Since I learned to fly, I took skydiving off my bucket list. No sense jumping out of a perfectly good aircraft.....

I would not put a roots through the hood unit on anything less than a stout big block, and a car with the drivetrain to use it. Thats a build automatic and a built nine inch, etc.

Maybe its my Mustang ancestry, but I much prefer Vortecs, or the current under hood screw types (Roush or similar). They are ok on small blocks.

And these are much more developed and good for street use.

Just my .02. I installed nitrous, and it was way to much for street use.... Ruins drag radials in a second, and makes too much noise....

 

always wanted a blower motor since 1980, never go around to building one.
Found a decent price on a new in box 8-71 and was thinking of picking it up.
The build would be a mild one, more show then go and aiming for 10s in a 3400 lb car.

besides not being able to see around the thing ( and the price) what are the draw backs for a grocery getting blown BBC ?

I've never had one of those big huge blowers, but I have had two of the Magnuson/Magnacharger under hood roots blowers with integrated intercoolers in two of my former street/strip cars, and although they're mostly for fuel injected applications, are a lot smaller and don't require the cutting of most hoods, their advantage is that they have an internal bypass valve which doesn't allow boost pressure to be made until there is at least half throttle input applied. Anything less than half throttle allows the internal rotors to be turned freely without pressure, which saves on gasoline and increases MPG during normal every day cruising.

Those big blowers don't have that feature and are always a parasitic draw on the engine at ALL throttle inputs to my knowledge. So to answer your question, the draw back of your idea is real bad gas mileage. With both my daily drivers, ( that were fuel injected) those small intercooled roots blowers added 140 HP on pump gas alone and I was able to bring them to the drag strip during track rentals, and run back to back to back quarter mile runs without any "heat soak" issues at all and without any change in ET's from run to run. You won't be able to do that with one of those big blowers unless you also have an efficient intercooler with it's own electric water pump.

 

It took me 40 years fpr me till I was able to build 8/71 blown BBC street car- I wont talk you out of it, that would be stupid. Mine is relatively mild only 755HP at 6700 - but it is still a blast to drive. Car weighs 3100 lbs with me in it!

I wished I would have built one sooner!

 

just do it! I always wanted a blown hotrod awhile back found a deal on a 6-71 set up and bought it. all in I had 2200 bucks in it and I bolted it to my 400 in the camaro that was pulled out of a impala back in the 80s. it ran good, my main issue was I couldn't see the passenger side. ended up pulling it about 10 years later and sold it for 3500 bucks.
I did a 142 mini blower on my 66 for awhile too. jim

 

In the early 90’s my friend built a 8:1 496 with a Weiand 8/71 2x750 Holley’s and Nitrous in front of an M22 in a 70 Camaro and just left the hood off, top of the 8 side stack air cleaner was even with the roof, I say Just Do It! 👍👍😆

 

I would definitely do it!

I started to put one together for my last Chevelle but ended up getting a F2 Procharger. It ran really hard, sounded great and was very efficient but didn’t have the wow factor of a Roots Blower sticking out of the hood.

 

Store the hood and do it!

 

Wrong picture, but the message is the same.

 

DOOOOOOOOO ITTTTTTTTTT!!!!!!!!!!!!!!!!!!!!!!

 

Have you heard of a movie called The Hollywood Knights ? Project X ! Do it .Some day I'm putting one on my 66 .They look so cool.

 

While it'll raise it a few more inches, they do make intercoolers for the 8-71 and other roots or screw compressors. Goes in-between the unit and engine. You'd need a pump and heat exchanger (i.e. radiator) to add onto it, but the overall setup does help. Probably not a "cheap" solution, although benefits may justify the expense.

Could also add water/methanol injection that helps cool it some, plus effectively raises the octane (meth). Side benefit with the water is clean combustion chambers.

 

If available in your area, E85 solves just about all the heat issues with a roots blower (okay, pretty much any boosted application). It has a few relatively minor issues of it's own (assuming not a road trip car) but near magic with boost.

 

Nothing looks cooler then a BBC blown twin carb engine sticking out of a hood. Go for it.

 

Put a bird catcher on the blower install for the ultimate look.

 

I had one on a big block in a 55 Nomad back in the late 70's. Was a hell of a lot of fun to drive. Would do it again on the right car.

 

Certainly don't need a blown BBC to run 10's in a 3400# car. What are you starting with for an engine? If talking about an OEM open chamber iron head BBC, then yes a blower is the quickest way to a lot more power. If building an engine from scratch (new/newer) aftermarket (or properly ported OEM) cylinder heads are in the mix a blower is not needed. With all the big inch engine options available, don't see a lot of roots blower builds anymore. A blower does have visual appeal. To go out and run 10's with a blown BBC is kinda disappointing. JMHO, I'd rather see a tunnel ram with a pair of TBI's.

 

Why not do both? Engine masters show tested this and it made power. It's in a pro street Nova now.

 

nice thing with the roots blowers, if you have a stock motor, just turn it slower and the motor will live, but it still looks great and the extra torque is amazing. jim

 

Joe, I dont think its an ET he is shooting for. It maybe more of an automotive art + NVH speed thing!

 

I realize that. Guess my point was visually tunnel ram also makes a statement and you see a lot less of them. When I see a blower on a car, kinda expect the car to look like a ProMod (lowered, tubbed, skinnies up front).

 

I hear ya Joe... I still have Oliver's tunnel-rammed El Camino stuck in my brain!

MIKE.... isn't there a BLACK FRIDAY SALE ON ROOTS BLOWERS somewhere man.....>! Littlefield LB-22 maybe!?

 

I say go for it . Its like a piece of art work , If you like it ,then its worth owning .And if one is good......

 

Do it. We put a 6-71 on a small block 350 in a 1947 Bentley,right hand drive. Tons of fun!