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Old 07-13-2008   #1
asshanson
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Re: Quick Oil Catch-Can question

From the looks of the diagram, it won't work under boost. In vacuum yea it'll suck out air from the valve cover, but under boost the air will have nowhere to go. You need to route the side port to the intake pipe to suck out air under boost.
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Old 07-14-2008   #2
Halon
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Re: Quick Oil Catch-Can question

Quote:
Originally Posted by slowboy View Post
From the looks of the diagram, it won't work under boost. In vacuum yea it'll suck out air from the valve cover, but under boost the air will have nowhere to go. You need to route the side port to the intake pipe to suck out air under boost.
Exactly. You are only venting the crank case when your engine is in a vacuum condition the way you have it set up. While under boost, the pressure that will build up in the crank case has no way out (Except maybe out your dipstick after it launches out.) I also don't see a need for an extra check valve both before and after the catch can. The one between the IM and Catch Can would be the only one you need.
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