So apparently I'm generating excess blowby. I spewed a little oil through my dipstick last night when I hit ~8.5psi.

Currently, I have PCV and Crankcase vent on the valve cover both routed into the atmosphere. I am going to connect the PCV back to how the factory intended. The only issue is it will raise my idle a bit because it will suck in "unmetered" air through the valve cover vent.

However, I was thinking about routing the valve cover breather to a catch can, and route that to the turbo. I have a catch can already, and a few feet of line. I just need to drill and tap my turbo intake for a hose fitting.


How have you turbo guys routed your PCV system?

This post has been edited by Syaoran: Aug 16, 2014 - 8:56 PM

They put the PCV in there for a reason. You should probably reconnect it to the intake manifold.
As for the valve cover breather, reconnect it to the intake piping before the turbo. That's where it's suppose to be.

I know there are several different reasons for both of those systems, but one of the reasons is to help bring oil up to the top of the head.

I made a Tee off to the PCV and a Vacuum block for the BOV.

I also made a catch can with a breather. One port to the valve cover, one port to the turbo intake.

Let's see how it works. This is basically what I did. I used 5/16" hose from the breather to the catch can, and from the catch can to the turbo.

I used 11/32" hose from the tee at the intake manifold to the vacuum block, and 5/16 to the PCV. All hose connections are clamped with fuel hose clamps. May need to replace with worm gear clamps.



This post has been edited by Syaoran: Aug 16, 2014 - 11:53 PM

its a MAP car, you dont have to worry about "un-metered air" That only applies to a MAF car

Yeah, by "unmetered" I meant potential vacuum leaks.

This wasn't enough. Oil was coming out of the dipstick. The ~6.9mm hole in the stock breather is way too small. I put a 15mm (5/8") fitting on the valve cover and it alleviated the problem immensely.

I'm going to upgrade to 19mm (3/4") now and see how it goes. If it doesn't completely eliminate the problem, I'll make another hole in the VC.