At what point will a -6an Head Vent become Insufficient?

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Aug 25, 2013 | 05:39 PM

#61

michaelrc51

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From: NJ

Quote:

Originally Posted by TheKidd113

No problem. To everyone else, just wondering why everyone thinks they need so many and so large of vents? -10AN seems excessive and more than three vents seems excessive. I thought I was going overboard with the three that I had. Before anyone gets butt hurt, I really am curious. Wondering if maybe I need to add one more to my VC. Are you running high compression and still getting blow back? Are you quickly filling catch cans? As stated before, I won't run one from my dipstick ever again.

To me it does seem excessive but I know there are plenty of people who ran 6AN valve cover vents and it wasn't enough. This is a big reason why I went to the 4, 6AN vents. I was thinking I may need to go 10AN with the 2 valve cover vents as a just in case option but figured it couldn't hurt. I have only driven my car shortly when it had 2 10AN lines coming from the back of the valve cover but when I took it out there was definitely some oil in there.
I am interested to see how the vented dipstick tube works when I start driving my car later this week. I think I SHOULD be fine with all 4, 6AN vents but we'll see.....

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Aug 26, 2013 | 07:09 AM

#62

Lexus01IS

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From: CT

I was running 6 -10an on my civic with battery size catch can. 4 -10an off VC and 2 -10 from block. 2 on the block also worked as drains. It was the best catch can setup that worked for 800WHP.