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Old 04-17-2012   #14
s1ngletracker
 
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Join Date: Oct 2005
Location: The land of the next-gen HMMWV
Drives: A BMW
Posts: 1,875
Re: Crankcase ventilation

If you want suction in your crankcase, do a slash cut in your exhaust, with a check valve to keep exhaust surges from pushing back into your crankcase. Slash cuts will actually increase in vacuum as boost/load increases, as opposed to intake manifold which will close the PCV valve and give you none. The intake tube port has a similar effect (though not as much) but also will spray discharge into your intake.

You don't need crankcase vapors to lubricate your wastegate actuator and BOV - a lot of the time your crankcase discharges are steamy (water vapor) nasty fluid anyway. Plus your turbo willl almost always spray a finite amount of oil there anyway.
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Last edited by s1ngletracker; 04-17-2012 at 07:22 AM..
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