PCV system and going turbo

[nate halter]

Hey guys what are you doing with the PCV system when you add a turbo? Cant find alot of info on eliminating it or re-working it. Thanks

 

[Swiggles]

Run a breather, pvc hole in the throttle body gets tapped and plugged. And then run a catch can.

Some run a hob, I think that's the word, switch to keep air moving at idle.

 

[GTPpower]

Some run a vacuum pump on a Hobbs switch to keep the crankcase under vacuum all the time.

 

[nate halter]

Why couldn't you just put a one way check valve to the throttle body so when under vac it works normally then under boost it blocks flow into crankcase?

 

[GTPpower]

You can do that as long as you are sure the check valve seals.

 

[GTPpower]

But you still need to vent the crankcase under boost, or it will find its own vent.

 

[Turbocharged400sbc]

Its not that its going to find a vent it's that you will dramatically increase oil blow by and likelihood of detonation from oil getting in the combustion