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Hi Everyone,
I appreciate the work you've done!
I was researching creating a catch can for my 2013 550i.
From your posts, everything sounds straightforward. The only part that confused me was adjusting the one-way valve. The way I understand it the valve should have zero resistance(of course it will always be some) when air goes one way and should block any air trying to go the opposite direction. I didn't get the point about "limiting the back pressure to -8 to -10psi." Could someone clarify this moment, please?
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