Quote:
Originally Posted by Calum
What? I thought one side was under vacuum, while at partial throttle, and the other was at or near atmospheric pressure. One side drawing a vacuum on the crankcase, and the other supplying a metered amount of fresh air. What happens when the two sides are allowed to equalize? Wouldn't that reduce the vacuum on the crankcase, and allow unmeasured air into the intake manifold?
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We move the PCV valve to the can itself which keeps the amount of air going into the plenum the same as a stock system. This is only necessary if you continue to run the system in an OEM format, with a hose going to the intake manifold. If you decide to run without the intake manifold hose, you'll run (2) 1/2" hose barbs instead of the valve, and they'll go to the intake (or a vacuum source of your choice, exhaust potentially). This is how we recommend running it once you go forced induction.
The PCV valve is very restrictive and cannot pull a vacuum on the crankcase. Try sucking through the valve and you'll see what I mean. Removing it from the system allows more vapor/gases to exit the system and overall is beneficial. We ran it in this configuration for a year before going forced induction and removing the PCV valve all together with no issues.
Hope that clears it up some, I understand where you question comes from. Other systems do what we found out we had to do to get everything to operate in harmony in an OEM format.
Thanks,
Eric