PCV fitting size?

black91turbo

Formerly black87turbo
Apr 27, 2006
1,064
0
0
38
Jacksonville, FL
Im going to AN fittings for the PCV system.....I am wondering what size I should use....I tapped the valve covers for 1/4" but its looks like it may be too small paired with -6 line. What about 3/8 and -8 line?

thanks
 

gofastgeorge

Banned
Jan 24, 2008
944
0
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Texas
I am runing -6 on my NA, but I think -8 would be better, especially for a turbo engine.
But if your tapped at 1/4" already, then -8 hose after that would only be marginally better,
since the ID of the 1/4" is the choke point.

What I did on mine, was to drill the ID of the fitting out.
Since it's low pressure, there is no chance of the fitting failing.
 

Enraged

A HG job took HOW long??
Mar 30, 2005
1,843
21
38
Victoria, BC, Canada
I'm using a metric o-ring adapter fitting (I think it was 14mm) to -8 braided lines to a PVC block I got CNC cut, then I'm running aluminum 1/2" hardline to the catchcan.