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Old 05-01-2008, 03:15 AM   #11 (permalink)
roflwaffle
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Pumping losses are only a significant issue when the engine is making power AFAIK. I've asked, and been told there is no significant difference when coasting in gear/engine off between throttle open and closed FWIW.

Quote:
Originally Posted by tjts1 View Post
The simple solution is to apply manifold vacuum to the crankcase.
Wouldn't that do funky things to the oil pressure?

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