Originally Posted By: rhouse181
I drive a 08 VW GTI with the 2.0 T FSI motor and I've been looking to add some kind of catch can/oil separator. BSH makes a rudimentary catch can which uses steel wool to condense particulates, but this Provent thing looks like it will work much better.
I was going to use their hardware to block off the stock PCV system and substitute in the Provent oil separator. Do you need a vacuum on the oil return line coming from the Provent can, or will the oil just drain out with gravity (or will that cause a pressure drop in the Provent, rendering it useless)? Any help is much appreciated...
Here is a cut and paste of a couple of my posts on vwvortex related to this. The info. may answer some of your questions:
Keeping things clean by all manner possible is the way to go, such as:
1. catch can and/or atmospheric pcv system/elimination
2. cleaning valves
http://forums.vwvortex.com/zerothread?id=4256886
3. running fuel injector cleaner, all good things to do.
To me, if cost was no factor, I would block off rear, block of intake hose, and run a Provent catch can
http://www.nloc.net/vbforum/ge....html .. ... ..
http://www.928gt.com/productspecs/ProVent1.pdf , together with an electric vacuum pump similar to this:
http://moparforums.com/forums/...r-234/
That way gases are still being pulled out of the crankcase under vacuum and you have a super efficient catch can with a built in pressure regulator which prevents overpressure in the crankcase if it ever was totally plugged and prevents gunk from going out the breather and getting your engine compartment dirty. And of course because it vents to the atmosphere, none of that gunk is going back into the engine.
also related info:
http://forums.vwvortex.com/zerothread?id=4181184
http://forums.vwvortex.com/zerothread?id=4261021
Potential problems with both FFE and BSH (BSH race can not out yet) as is are:
1. Potential to freeze in cold weather
2. No pressure relief valve so that if lines/can became clogged it could cause overpressure in crankcase
3. No vacuum assist, relies on atmospheric pressure alone which some say can cause oil to degrade much more quickly due to inadequate evacuation of crankcase gases/oil/fuel/other. Note that other systems on other cars usually drill additional ports for the atmospheric system to work correctly. It has to "breathe" well. The current systems rely on one small port. Is it enough? Who knows?
More info here:
http://www.honda-tech.com/showthread.php?t=1199935
http://www.gemo-online.de/pdf/...g.pdf