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Volumetric Efficiency


Guest jamo761

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ve has a driect effect on performance a turbo has dished pistons for this reason decresing compresion will increse ve this can be done with dished pistons thicker head gasket and cam timing retarded cam will lower compersion advanced cam timing wil raise compresion but you will lose ve

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VE is defined as the volume of air (at atmospheric pressure) than a particular cylinder ingests, divided by the displacement of that cylinder multiplied by 100.

 

So if your 600cc cylinder ingests 650cc of air (at atmospheric pressure) then your VE is 108%. A well engineered intake system can easiliy have VE's over 100% in some RPM ranges. Turbo and supercharged engines obviously can exceed 100% VE quite easily.

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