Quote:
Originally Posted by drmiller100
You are suggesting air is not an ideal gas in normal atmospheric conditions?????
Now you are just being silly.
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Go read my previous post.
Aside from that, no he is not suggesting air doesn't behave like an ideal gas. Drawing air past a throttle is adiabatic since there is no heat exchange. That does not mean the work it takes to draw air past the throttle has anything to do with energy required for adiabatic compression. I just computed slightly over 1hp average power consumption on the intake stroke, and that doesn't account for the small amount of energy returned to the piston during compression. True idle pumping loss should be around 1hp with a 1000rpm idle on 2L engine, 7psi manifold pressure.
Seriously, go read a physics textbook.