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  #16 (permalink)  
Old 11-07-2013, 10:30 PM
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That Edelbrock TVS blower is the hot new setup for roots types, but it's real expensive (and made by Edelbrock). But it's the only Eaton 4-lobe game in town for carbs AFAIK. You could use a blow-thru centrifugal type like a Procharger and get great results without even chopping the hood, and a lot cheaper. Easy to get 500hp if you build the motor right (like 8:1 or 8.5:1 at most for starters).

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  #17 (permalink)  
Old 11-08-2013, 02:00 AM
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Originally Posted by Project89 View Post
its been done a few times on tgo , 142's under stock hoods
This would require lowering the whole engine and transmission by 3 full inches.
That is not going to happen. It won;t be a 89 camaro when done.
and will have 0 ground clearance. Think about it.

A stock flat camaro hood is not the same as a cowl induction hood with a 3" rise
in it. Unless you want to end up with some $100,000 faint figment of the imagination of of what once was a camaro... Keep dreaming.

If 440 to 480hp is the amount of power you want the 142 weiand blower gets it done very well on a low cr 350.
A 3" cowl hood or a hood scoop allows it on the stock chassis with the engine+ transmission in the stock position.

Last edited by F-BIRD'88; 11-08-2013 at 02:25 AM.
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  #18 (permalink)  
Old 11-08-2013, 05:25 AM
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If your going for the best look/power then go with a polished 671 w/ low boost
If you main goal is power & efficiency then go with the 142 and more boost
And if you dont want anything sticking out of the hood go with a Procharger.
As already said any of those combo's will hit your goal

PS
THERE'S NOTHING LIKE A BIG *** POLISHED BLOWER

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Old 11-08-2013, 08:20 AM
How fast is fast enough?
 
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If you want the best power anything ending in "-71" isn't going to get you there.

The edelbrock "eaton" unit is nice for a typical street car, it'll get you 500hp pretty easily...

But if you want to go nuts, contact whipple. build a solid 400ci sbc with an aftermarket block, rotating assembly, 225+cc heads, roller cam, etc and bolt on one of their units, set for 30psi on E85 and you'll be over 1,000hp... Total cost probably somewhere around 20-25K.

That's the nice thing about not giving any details- either option is equally as valid.
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Old 11-08-2013, 02:47 PM
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Originally Posted by ap72 View Post
If you want the best power anything ending in "-71" isn't going to get you there.
Are you kidding Ap? Define "best power", we're all ears!

I agree there are more desirable alternatives, depending on what you're looking for, but a roots blower will certainly get you there.
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  #21 (permalink)  
Old 11-08-2013, 02:51 PM
How fast is fast enough?
 
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Are you kidding Ap? Define "best power", we're all ears!
their efficiency is very poor compared to any modern designs, takes more power to drive them and they produce less.
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Old 11-08-2013, 03:06 PM
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i want it to look and be fast
Then ditch the GEN1 SBC/supercharger idea and throw a GEN3 LS motor and turbo in that thing.
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Old 11-08-2013, 03:16 PM
How fast is fast enough?
 
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Then ditch the GEN1 SBC/supercharger idea and throw a GEN3 LS motor and turbo in that thing.
you may as well try to teach a pig latin. This forum is for the old an outdated sbc. Sure its a poor design by modern standards but its all most of these people know and they'll never let go of it.

Hell people ask for a carb recommendation at least every other day- a freaking CARB?!?!?
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  #24 (permalink)  
Old 11-09-2013, 09:38 AM
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Quote:
Originally Posted by ProStreetRob View Post
If your going for the best look/power then go with a polished 671 w/ low boost
If you main goal is power & efficiency then go with the 142 and more boost
And if you dont want anything sticking out of the hood go with a Procharger.
As already said any of those combo's will hit your goal

PS
THERE'S NOTHING LIKE A BIG *** POLISHED BLOWER

Pretty much sums it up.

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Old 11-11-2013, 08:40 AM
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We did several Whipple blower installations on some lower level Poker Run type boats. They were VERY easy to install, their quality was superb and they made a TON of power. Most of these were 383's with 93 octane and running a Mega Squirt system. One was a 427 SBC using an aftermarket block.
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  #26 (permalink)  
Old 11-11-2013, 09:08 AM
How fast is fast enough?
 
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Originally Posted by AutoGear View Post
We did several Whipple blower installations on some lower level Poker Run type boats. They were VERY easy to install, their quality was superb and they made a TON of power. Most of these were 383's with 93 octane and running a Mega Squirt system. One was a 427 SBC using an aftermarket block.
This is a good place to start!

a phone call to whipple would be a good second move.
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  #27 (permalink)  
Old 11-11-2013, 11:39 AM
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Quote:
Originally Posted by 68NovaSS View Post
Are you kidding Ap? Define "best power", we're all ears!

I agree there are more desirable alternatives, depending on what you're looking for, but a roots blower will certainly get you there.

I agree It'll Get you there and more!!!!

Jester
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  #28 (permalink)  
Old 11-11-2013, 12:05 PM
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QUOTE:
"Blower speed is determined by the belt-driven pulleys used on the front of the engine. The faster you spin the blower, the more air the blower moves. Unfortunately, this also creates heat. Lots of heat. Additionally, while internal clearances on Roots blowers are better than they'’ve ever been, internal leakage still occurs, which decreases the blower’s efficiency. The most popular of the Roots blowers are the 6-71 and 8-71 superchargers most often seen on Pro Street cars.

Centrifugals have become the fastest-growing supercharger segment in hot rodding, mostly for packaging reasons. The centrifugal is really little more than a belt-driven turbocharger. Centrifugals work on the principle of using an impeller spinning at extremely high speeds to accelerate the air and pass it through a diffuser to slow it down, creating pressure (and increasing temperature) as a result. The air is then piped to the engine intake.

One significant difference between a centrifugal supercharger and a Roots blower is that the centrifugal is a true compressor rather than an air mover. This means that the air exiting the centrifugal is already under pressure. This is measured in the centrifugal’s rating of 70 percent adiabatic efficiency versus the Roots’ less efficient 50 to 60 percent rating. One advantage of the Roots blower over a centrifugal is the Roots is a positive-displacement blower, which means it can come up on BOOST ALMOST INSTANTANEOUSLY ! , while centrifugals require time to “spool up” to create boost. As you can see, there are a number of variables that make the decision a little tougher.

A recent addition to rodding’s family of superchargers is the screw supercharger. The screw supercharger is a device originally designed as a large industrial air compressor. Norm Drazy was the first to employ the screw supercharger in drag racing, while another ex–drag racer, Art Whipple, has worked with the Auto Rotor Company to produce a series of street screw superchargers.

Designed as a dedicated compressor, the screw supercharger also enjoys a rating of high-70 to low-80 percent adiabatic efficiency as well as a compact size. The supercharger gets its name from its twin screws that inter-mesh inside a case to compress incoming air efficiently. The original Whipple blowers were small and intended for mild Chevy pickup applications, but Whipple has a larger screw supercharger that will be capable of 750 hp. " [END QUOTE]

Just a note you might be interested in:
I ran 2 Inch blower belts on my 471s and 671s on the street because they are much quieter then the 3 inch and I always carried a spare belt in the car, I ran 3 inch belts at the Drag strip !!!

Jester

Last edited by painted jester; 11-11-2013 at 12:31 PM.
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