Turbo catch can different than N/A catch can?

[Shaman]

Been looking into putting in a catch can, as the intercooler is getting oily, and was wondering if I needed to so something different than what I did on my N/A car. Just used a air/water separator for the N/A car.

 

[02Pilot]

If you are plumbing the line to terminate in the intake tract somewhere rather than just vented to the atmosphere, you'll need to make sure it comes in before the turbo, or alternatively you'll need a one-way valve to prevent turbo pressure from backfeeding into the crankcase.

 

[Gary Allan]

The theory of operation is the same. Eliminate the velocity that holds the heavy oil vapors in the flow. No velocity ..no suspension of heavy wet vapors.

 

[Shaman]

It's going from the intake manifold to the PCV valve.

 

[chevrofreak]

The PCV valve probably closes under boost to prevent backflow, so I figure that the worst that would happen is your catch can getting pressurized under boost.

 

[Drew99GT]

Originally Posted By: Shaman
It's going from the intake manifold to the PCV valve.


Many factory turbo cars are setup that way, but they also have another line from the valve cover or block to the inlet side of the turbocharger.

 

[Tornado Red]

Isn't there some repair or modification to the PCV itself? If too much oil is blowing out, there has to be a reason; it is not normal.

 

[lawdogg]

I spliced an inline fuel filter from Autozone into my crank breather line and it is essentially a $1.00 catch can that works great.

But ^ is right, if you have abnormally high crank case pressure, something may be amiss other than a bad PCV valve.

 

[Shaman]

I don't have any noticeable problems, but I am the "if it ain't broke, and you can make it better, do it" kinda guy. Gotta fiddle