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post #1 of 6 (permalink) Old 07-21-2003, 01:49 PM Thread Starter
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Lightbulb Dual Supercharger

Everyone knows it helps preformance to have a supercharger force air into the intake. But what about a supercharger to force exaust out of the car. This is just theory, but it sounds not only plausable, but more efficent. Any ideas? Please?

Modifications....

-air silencer removed
-3.25 pipe from filter to throttle body
-cone filter
-flowmaster muffler in for resonator
-3 inch exaust past muffler
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post #2 of 6 (permalink) Old 07-21-2003, 02:04 PM
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The roots superchargers that everyone uses (GMC) were designed for use on the exhaust side of diesel engines to scavenge the exhaust. So in theory, you are correct.

However, in a gasoline engine, the amount of power to turn the supercharger vs. the amount of power gained by scavenging the exhaust is not efficient. Remember that a diesel engine has a very high compression ratio and it helps to pull the exhaust out of the cylinder.

And if anyone cares:
6 - 53
6 - 71
6V - 71
8 - 71
10 - 71

The first number indicates that the blower was engineered to be installed on a 6/8/10-cylinder engine, and the second number indicates the size (cubic inches) of each cylinder . The “V” designator indicates it was designed for a “V” type engine and has a different mounting base. Knowing this, you can calculate the cubic inches the supercharger pumps out for each revolution.

Just thought I’d pass that little bit of information on.

If I’m wrong, someone please correct me.

97 Lincoln Mark VIII LSC (Chip'd, 3.73 T/L... so far... )
97 Ford Aspire (Slow, but getting 36 mpg (f'n Ethenol!! )
84 F250 Dually w/6.9L Diesel (7.3L IDI pending)
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post #3 of 6 (permalink) Old 07-21-2003, 07:54 PM
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dont forget the little 4-71...

1997 Mark VIII
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post #4 of 6 (permalink) Old 07-21-2003, 10:15 PM
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Yeah, I left out a bunch.

Don't they go all the way up to 14-71?

Now that will move some air!!

97 Lincoln Mark VIII LSC (Chip'd, 3.73 T/L... so far... )
97 Ford Aspire (Slow, but getting 36 mpg (f'n Ethenol!! )
84 F250 Dually w/6.9L Diesel (7.3L IDI pending)
73 Mercury Cougar Convertible w/351C 4V (Partially Restored)
69 F100 LWB w/460 Engine
76 Glastron Carlson 23' Jet Boat w/460 CJ Engine
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post #5 of 6 (permalink) Old 07-21-2003, 10:29 PM
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yup.. something like that..
i always thought that a turbo/super combo would be great.. feed the turbo boost into a Kenne Bell and go to town assuming you can get a bottom end to hold up

1997 Mark VIII
Pewter Grey / Light Graphite

Some of this, a little more of that, and someday it will leave the garage
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post #6 of 6 (permalink) Old 07-22-2003, 09:18 AM Thread Starter
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I wouldn't mind haveing 6 extra cylinders.

Modifications....

-air silencer removed
-3.25 pipe from filter to throttle body
-cone filter
-flowmaster muffler in for resonator
-3 inch exaust past muffler
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