John I am/was hesitant on this issue too. I still have my pcv in place, but also wanted to run it to a catch can, but I didn't jump right on to that. The way I see it though. Under boost, the pcv is closed, which means, without a pcv, this is open all the time, so you have twice the crankcase ventilation area when the car is boosting without a pcv compared to with, because you have the breather and the pcv just venting at their will, but then under vacuum, you don't have anything drawing it through. This means that crap will corrode and sludge things up because it is not really being drawn out. I think this will only be a problem when things are not adequately ventalated.. Like if the pcv sticks closed. I believe if everything is open, everything should be adequately ventaled. BUT, there is still a lot of blow by gasses and crap that will just be hanging around because they have no reason to get sucked out. They are only free to go out if they wish. It's not nice to have these blow by gasses lowering the knock index though. Ryan Lore or Chris Andrews thoughts would be appreciated more on this.
Wierd thing is I guess, is that when the most blow by gasses will be getting into the crankcase, is when the pcv is doing nothing - i.e closed. So many for a turboed car it would be good to have twice that area for the blow by gasses to flow out, although under vacuum I guess they would all get sucked out without causing much damage. Sure is debatable. I'm tempted to keep mine in place. What we really need is a pcv system, and another solenoid in there to open up when under boost. Get the best of both worlds, but still no idea what to do with the blowby gasses. Maybe get a airpump. And suck them out to atmosphere. 150 lbs and 10 hp loss later though your perfect pcv system is done. :laugh:
Also do aircare people look for a pcv when you go through? For some reason I though they did, but probably not I guess they just check the tailpipe.
