Quote:
Originally Posted by gunchamp
Why is a catch can needed on these cars in stock form? I mean I used to run these in my boosted applications, but seem to read here often that guys are doing this on bolt on cars. Just curious.
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They suck in oil from the valley cover pcv and cycle it right back in the intake. Oil lowers fuel octane and dirties up the intake, etc., and lower fuel octane.
I ran E85 n/a and my can caught a decent amount.
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2010 2SS RS A6 781rwhp on E85
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