Quote:
Originally Posted by FR-S Matt
Just making sure I understand it right.
and the direction of flow goes Crank case ---> Catch Can ----> Intake Manifold or the other way around?
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That is the way it is supposed to work as the vacuum produced in the intake manifold pulls the crankcase pressure out. The problem is that in a forced induction application not only does that vacuum go away under throttle, but you are now pressurizing the intake manifold which is then going to attempt to pressurize your crankcase reversing that flow without a check valve.