Quote:
Originally Posted by Irace86.2.0
I guess the other thing is that the PCV system is sucking unmetered air into the intake manifold, which seems bad, but maybe the stock tune compensates for this or maybe the physics works out somehow.
I agree that proper catch can sizing and baffling is important. I just don’t know that a closed system is best or necessary.
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The stock PCV system pulls air from after the MAF so it is both filtered and metered.