Ebay GT45 + 5.9 Magnum + E85 blow thru

subcom said

I have actually, just haven't put a ton of thought into it.
I currently have a catch can that is fed from the top of both valve covers. I have standard PCVs that I removed the check valve from so they are continuously wide open.

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Then isn't that putting 7psi into your crankcase through the open PCV?
A 1 way check valve of some sort needs to be between the Catch can and intake.