supercharger

[Gordy911]

My wife has a buick regal gs with a supercharger we actually at one point had 2 just alike and was wondering if that roots style blower would work on the Hawk. It usually only runs up to about 8lb boost but would sure give it a kick in the pants when you needed it.

62 GT Hawk
84 vette
31 Ford Pickup

[John Kirchhoff]

The nice thing about rootes type blowers is that they are positive displacement. In other words, double the speed of the blower and it pumps twice the air, quadruple the speed and four times the air. Centrifugal blowers, whether an exhaust driven turbocharger, Paxton (Stude type) or the Paxton belt driven, turbo type are not linear in output. Double the speed and it pumps four times as much air. Rootes do a much better job of providing low end grunt whereas centrifugal blowers may provide lots of high rpm power, they usually produce very little extra low rpm hp and often times less hp at low rpms than a comparable naturally aspirated engine. With multi port fuel injection, the rootes probably work great but using a carb ahead of the blower means there's a long distance for the fuel air mix to travel before it gets to where it's needed. That's why blow through carb setups are usually better natured when driving and easier to start than the suck through style. Long intake runners, bends, curves or anything that allows even a momentary reduction in velocity provides opportunities for the fuel to fall out of the intake charge. If you could figure a way to incorporate multi port fuel injection on a Stude, it'd be a great way to get extra hp throughout the rpm range. Eight pounds of boost should increase the hp approximately 50% IF you can get that air into the engine. Just remember that big boost numbers don't mean everything. Air behaves just like hydraulics; pressure is a result of flow working against restriction. My in town job includes designing underground water pipelines. Try to push water through 3,000' of 3/4 inch pipeline and you'll have something like 50 psi at the pump but I could pee a bigger trickle than exits the end of the pipe. Make it a 1-1/4" pipe and there'll be around 20 psi at the pump and 10 gpm exiting the end. Like I said, pressure means nothing except when used in conjunction with volume.

[Swifster]

The Eaton MP90 would probably work well, but you'd need to make a manifold to mount it. That supercharger is also used on the '89-'92 Thunderbird SuperCoupe. Magnacharger can probably also get the parts needed to have the inlet charge mounted from the front or rear.

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Tom - Valrico, FL

1964 Studebaker Daytona - 289 4V, 4-Speed (Cost To Date: $1903.98)

[PlainBrownR2]

Yeah thats one of the things about the Eaton positive displacement blowers over ours. I've heard a lot of postive things about use the positive displacement blowers. That and the blowers are found allll over the place. Couple of things about using the Eaton. In the case of blowers like the Eatons they are more application specific. You made need to modify or fabricate a manifold or adapter to mount the blower. The other thing is the "nose", where the gear assembly and pulley are housed. The nose comes in a few varieties to adapt to the application being used, so it may come down to:
Modify the nose
Take measurements and mockup the blower to fabricate an adapter or manifold.
Find a nose that will fit

The web is also great for these blowers as the CAPA site provides technical dimensions on the blowers they sell. I knew this one as I remember a guy from the chatrooms modified an Eaton blower to fit an L37 on a GTP, and he used the site a little bit.


1964 Studebaker Commander R2 clone
1950 Studebaker 2R5 with 170 turbocharged
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