Quote:
Originally Posted by Frank Lee
I have elaborated in the past. The short version is, pumping air through cylinder(s) in which no combustion takes place consumes power. Ever notice how powerful the motors on air compressors need to be?
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Maybe link to your elaboration? I still don't see how over-stoich-AFR, i.e. pumping extra air through the cylinder that doesn't contribute to combustion, is different. I see an energy conservation argument here.