Quote:
Originally Posted by redyaris
That is not corect. You would have to do some testing or find some sort of chart, to see what the mass of air traped in the cyclinder is at % throatle. There is no liniar relationship between % throatle position and mass of air traped in the cylinder under variouse % throatle.
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Volumetric efficiency also plays a role in here too. There's a lot of variables, but the math works out to be roughly the same. Volumetric efficiency is something you can measure at EVERY RPM and throttle position; not just at max throttle and most efficient RPM.