Volumetric Efficiency
I recently programmed car PC to calculate volumetric efficiency (VE) using RPM, MAF, IAT to calculate the air volume / min, and comparing the result to a theoretical 100% efficient engine (swallows 2260cc of air every four strokes).
VE = calculated value / theoretical value
Obviously being a turbo, the VE for the MZR is > 100%. I've so far seen a peak of 208%, basically meaning it's pushing 4701cc of air into the 2260cc of combustion chamber.
I am calculating all this the same way one would for an naturally aspirated engine. I am wondering if there is another way of calculating VE for turbocharged engines, a coefficient or additional calculation that accounts for the presence of a turbo, so for example that 208% might in fact be 80% when one accounts for the turbo in the VE calculations.
Last edited by Nexus; 24-06-2010 at 10:49 PM.
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