07-15-2011, 11:24 AM
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#22 (permalink)
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Enthusiast Member
Join Date: Mar 2011
Location: Austin, TX
Posts: 279
Drives: '11 Gunmetal 370Z MT
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Quote:
Originally Posted by christian370z
There is a law of diminishing returns as you stack up mods as the engine reaches peak volumetric efficiency. This is essentially because the engine has a set volume (displacement) and while it is impossible to achieve 100% VE due to turbulence/friction/leaks, you can get closer with breathing mods on the intake and exhaust sides. I'm not an expert on this at all, but one of the variables in getting better volumetric effeciency is not only total air flow volume, but also density.
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Actually it is possible to get > 100% VE through certian rpm ranges on an NA car with because of things like intake runners tuned to resonate at specific RPMs or a true ram air intake can slightly pressurize the intake stroke. Couple that with properly tuned/sized cams, good exhaust scavenging, and overall low flow restriction and you can do it.
Last edited by ChipsWithDips; 07-15-2011 at 11:30 AM.
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