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Old 05-09-2008, 03:42 PM   #66 (permalink)
JohnnyGrey
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Join Date: Apr 2008
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Pushrod - '02 Chevrolet Cavalier
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Quote:

Some of the other posts are implying to use a turbo to eliminate pumping losses in a gasser, this is really not possible. To eliminate pumping loss vacuum you need to fill the cylinder with something, either air or EGR. If you go the air route you have to lean it out, if you dont then you have effectively just pushed the gas pedal farther to the floor as you are adding fuel to keep 14.7:1 A/F ratio. You dont need a turbo to lean out the mixture.
Turbos only eliminate pumping losses when employed on smaller engines in the same power range. For example, a 2.0T won't suffer from the pumping losses a naturally aspirated 3.0L engine will because the 2.0T's manifold is closer to atmospheric most of the time, than the 3.0L is. Slapping a turbo on a given engine won't do anything for pumping losses though.
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