How Do You Boosted Guys Run Your PCV System?????
#23
TECH Veteran
iTrader: (5)
What's wrong with the idea in the above link's thread is that the PCV valve is designed to be closed under high engine vacuum, and if there is positive pressure in the crankcase, that pressure needs to escape. The stock escape point is the passenger-side breather, which goes to the throttle body. Under normal circumstances, it breathes air filtered by the engine's air filter into the crankcase. If pressure is present, it will escape, and gets sucked into the engine through the throttle. Also, in that link, the tee and check valve feeding the intake manifold is redundant. Having it at all is giving the turbo a chance to pressurize the crankcase if the check valve fails. The stock PCV system cannot pressurize the crankcase, if it enters on the vacuum side of the blower/turbo. I wanted a vacuum pump too, but I know it is unnecessary now.
#26
Registered abuser
iTrader: (10)
the question is, how important is it to have stout vacuum in the crankcase at idle speeds and just off idle? I think it is for various reasons but I would like to hear some other thoughts on it. I WILL test it both ways when I throw the engine on a dyno, out of curiosity more than anything.
#28
Truck Sponsor
iTrader: (12)
At wot never had oil mist anywhere.
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