Quote:
Originally Posted by Andrew7dg
It flows both ways. Under boost, the PCV closes, and blowby and other CC leaks need a way out - through the VC breather. It helps to have vacuum to pull gasses out or they stay in the oil.
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Yeah, I think I covered that already. The stock PCV system do not create a vacuum in the crankcase either, it only moves air thru the crankcase. You want a vacuum on the crankcase, block off the breather port. And then watch oil shoot out of every possible area under boost.
With the amount of blowby coming out of our engines under high boost, you'll never have a vacuum inside the crankcase. Even if you could put together a system to create a vacuum in the crankcase under full boost. the gains would not offset the effort.
Possitive
Crankcase
Ventilation. Not Positive Crankcase Vacuum, get it?
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