PCV question on AAM twin turbo kit
 

This is probably a simple question for most. I'm wrapping up my AAM twin turbo install and am setting up the pcv system.

It comes with two check valves, and lines. The lines come from the intake pipe to the valve cover. Which way should the air be flowing? Should the flow be from the intake pipe to the valve cover or from the valve cover to the intake pipe? Help on this is greatly appreciated!


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Intake pipe creates vacuum and valve cover vent "vents".

right now the check valves are set up so that the air flow would be from the valve cover to the intake pipe.

The issue is that there is a huge vacuum so that when I remove the oil cap right after turning the car off it sucks in a lot of air. I know pressure is bad but what about vacuum?


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So you are getting vacuum from the oil fill spout right after you turn the car off?


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Yes


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I'm going to just remove the check valves all together

Any updates on this?

Capped intake, breathers on pcv, setting up catch cans between valve covers and intake pipes.


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Ok so looks like you are running the same set up cool!! Do the catch cans catch a lot of oil?


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IDK about the same set-up' ,,, but Blue has the Big-Boy Kit!!!

I just installed them a few days back so we will see how much they collect.

What do you mean by "big boy kit"?


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Real nice setup, looks good!
I'm thinking about doing away with my check valves also!

AAM Twin Turbo PCV
 

I know this thread has been dead for some time but I am dealing with this issue right now. I am unsure on which direction the check valves between the intakes and the valve covers should be flowing. From everything I read I would think it would go from the intake to the valve cover but when I hook it up like this and delete the PCV valves and put a catch can inline I get smoke. I haven't tried putting the catch can in place of the intake check valves and I am wondering if that worked out for others?

air flows out of the valve cover to the intakes to be sucked back into the engine

Flow direction is from pcv to upper intake plenum; check valves in these hoses prevent boosting crankcase,,,if catch cans are used-pcv to catch can inlet,catch can outlet to check valve,check valves to upper plenum (arrow to upper plenum)
Other valve cover vent pipe (near throttle bodies) vent to atmosphere w/small breather filters.