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Old 04-30-2008, 08:43 AM   #13 (permalink)
JohnnyGrey
Master EcoModder
 
Join Date: Apr 2008
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Pushrod - '02 Chevrolet Cavalier
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Quote:
As noted, some of those intake and exhaust mods only work with old school, non computerized engines. Less restriction on intake or exhaust does not always equal better efficiency on modern computer controlled engines.
These mods have the effect of leaning out the mixture on open loop cars because they let more air in. Modern ECUs will match that extra air with extra fuel.
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