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Old 04-30-2008, 11:17 PM   #9 (permalink)
LostCause
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In any even number cylinder engine, the piston won't compress air on its underside because another piston will be travelling in the opposite direction. The PCV generally exists only for piston blowby.

I still think you can calculate (intake) pumping losses by vacuum alone, but I'm interested in any results.

- LostCause
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