Alright guys, i posted a topic before about putting in a supercharger for my 72 Elky. But I'm thinking that nitrous would be a better choice. I can't fit a blower on the existing manifold w/out modifying the hood and getting a much smaller air cleaner, so nitrous would be much easier. One problem is where would I be able to mount the 10pound bottle, besides the bed??

I don't know if you have buckets or bench seat, but a friend of mine mounted two 5 pound bottles behind the bench seat in his 71 a bunch of years ago. A 10 pound bottle probably wouldn't fit(?). You could probably get the guys at NOS to trade straight across (a ten for two 5's)if you had to.

more hp with the juice

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Dean Ciampi
Autumn Gold 1970 LS6 Chevelle
Team Chevelle Gold #52 Aces #3094

Get the blower! Looks way more impressive, and I think its more "natural" power(lack of a better word).And the horses are there all the time.••••••Now this is just my opinion but, If you have a Race engine you have the highest performance parts.lightest pistons ,rods.rockers.crank..etc...say its a 350 you build.with all the good parts you have about a 650 hp small block and all the insides were meant to handle all that horsepower Now you take a stock motor or even a engine with upgraded parts and you have the nitrous make a 350 normally with 375hp start pushing 600hp.the engine wasn't built to do those kind of things. I just wouldn't feel good about trying to wring out so much more hp with something so simpe.Just my opinion..to each his own....P.S. the bottle is fine if you and your engine builder build it with nitrous in mind.

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JoeS
"67 Malibu"

Yes you can put a blower under a stock hood. Can't think of the Co. name right now, but have a catalog on the way. It sit offset and about carb level and is oil fed from the cars system. As soon as I get the catalog I'll post the company name.

The El Camino has that unused space under the front of the bed which might be able to hold some tanks.

Is it a Paxton Supercharger? Doesn't that mount differently than a roots-type blower?

Like I said in my earlier reply to your question, I think you could fit a B&M Powercharger under your stock hood. Yes, I,m using a two inch filter element but I feel that the two inch K&N flows better than a paper three inch filter. The throttle response and "all around driving" is really great with this setup. I also have a B&M Megablower on my 65 Vette so I'm definatly prejudiced, but hey, it works for me!

The ATI Procharger will fit under the hood and is much more efficient than a roots type blower. It blows through your carb and mounts over where the stock A/C compressor goes.

http://www.procharger.com

Yeah guys, I've checked out the Procharger, but I'm looking for a roots type blower rather than a centrifugal one. I've seen them in many 70-72's, but I just need to find out which one will fit. Patrick, if you could get back to me with the name of that company I'd appreciate it, and Bryan, what year Chevelle do you have that fits that B&M Powercharger??? I'd also like to know what a good choice for a manifold would be since I don't think my Edelbrock Performer will fit the blower. Thanks

[This message has been edited by 72Elky (edited 06-21-99).]

You need a blower manifiold that fits whatever blower you decide to go with. Just for the record, if you decide on a roots type blower, you'll need to over-drive it to make serious power (like nitrous). A lot of street blowers keep it to about 10% underdriven in order to keep the compression and heat down for street use. When you get above a one-to-one ratio, you start to make serious power, but it's real hard on parts. As you're aware, compression for a blower motor needs to be low. If you're already running more than about 8:1 CR. your compression is probably too high (remember, boost=compression). I love blowers! they're just cool, but if you just wanna go real fast, stick with nitrous and spend the money you would have spent on the blower, getting the car to hook up. On the other hand... you could under drive the blower to make it streetable and then...... SQUEEZE it!

I agree with the argument the a blower is better because the power is on all the time. I like blowers myself. But that is also one of the drawbacks of the blower. You are driving all that power all the time. Its up to you, do you want to drive a car with that much power ( I do ). Or you could just you the nitrous at the races, and put around in a more docile car. Your pick. I kinda like my cars a little on th wild side. Nothing like that blower wine.

72 Elky, my car is a 68 Malibu with a SS hood. I don't think the hood makes any difference though. You don't need to worry about what kind of manifold to use, it comes with the blower. All roots type blowers are this way, the manifold is part of the package and designed to work with their product. You won't be subjecting your motor to the full effects of the blower all the time either. A lot of people don't know it but under normal driving conditions blowers produce vaccuum in the manifold just like a normally aspirated engine. Only under load does the boost come in. I built my engines specifically for blowers, they have dished TRW supercharger pistons. I run about 8 to 8.5 to one compression on pump gas. The only other thing you may have to do is upgrade your cooling system. I had to run a aftermarket radiator and cooling fans on my Malibu but my stock radiator works fine on my Vette.

Bob-

I'm running the same dished TRW pistons as you are. I'm pretty much decided on running a blower rather than nitrous. I know that I have to have a much lower compression ratio. How can I lower my 10:1 ratio to something like 8:1???

Just got this catalog:
ProCharger Centfifugal Supercharger System
Accessible Technologies, Inc.
14014 w. 107th St.
Lenexa, KS 66215
913.338.2886
I think they are on the internet (ATI).

But it will fit under your hood. There not cheep, $1700+. But they claim 40% to 80% hp gain.

The Speedpro (formerly TRW, still under that name) L2441F blower piston will only give a 8.24 to 1 compression ratio and thats with 64cc heads.You have a 355 right? I am running World Products Sportsman II's on mine. If you are running a true dished piston like this there's no way you would get 10 to 1 compression. With 76cc heads you would only have about 7.5 to 1 compression. You must get your compression down to 8.5 to 1 maximum. I have run a blower on a car with 9.5 to 1 compression and it did'nt last long! I can e-mail you some jpegs of what my set up looks like installed in my car if you would like, just let me know. Bob

I have a 350. Well I might be wrong about my ratio, because I've only owned the car a few weeks and this is what the previous owner told me. Could you send me those pics of your setup?? lamoraj@erols.com

what engine do you have big or small . if small it will fit no broblum under a ss hood if its a bbc it will be tight tring to fit an air cleaner. i have pics if you want to see

I know that Vortech makes superchargers that you can easilly control how much it spools up, it almost looks like a fiberglass box around the carb that has a airpipe that goes down by the passenger side manifold. I have no clue what the price is but i'd "take the new age blower in a heartbeat" man. :hurray: