Originally Posted by PoorMans180SX

The point is not to build vacuum, as what you're stating is correct. The point is to generate flow. You can then use the intake like a venturi in a carb, and draw air through the system using the intake flow. The closer to the turbo the better essentially, as long as your catch can is able to keep the oil and vapors separated.

This is why exhaust evac works as well, no vacuum, but lots of flow. Again, as long as you can keep oil from disappearing out the exhaust.

You should always use a nozzle with a slit in it for either. Like this:



This guy has tested it. No vacuum, but less crank case pressure with his compound setup.

http://www.dsmtuners.com/forums/cust...on-system.html