Quote:
Originally Posted by Zerohour
It depends on two things. How you drive it and how the engine/transmission itself responds to the modifications.
If you want more power to go faster, then of course you're going to loss economy. Its hard to get around basic physics and chemistry.
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Pulling more air through the system will increase full consumption as the engine management attempts to maintained program A/F ratio. If you have a 4 speed where you encounter flat spots of acceleration, opening up the intake and exhaust will help you maintain less throttle to obtain higher speeds.
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I am trying to understand this as it applies to more than just the SOUL. You seem to be saying two different things:
1) If you modify the intake and exhaust to ALLOW more air flow this doesn't actually PULL more air does it? Air flow is a function of engine RPM right? Are the "flat spots of acceleration" due to air flow restriction?
2) After the mods will you be able to use less throttle at lower speeds also or does the increased AVAILABLE air flow only help when at higher RPM than most FE driving calls for??
Don