Quote:
Originally Posted by Sellout
PCV valves close at wide open throttle, the "benefit" you're talking about isn't quite what you're making it sound like.
There are a whole lot of turbo cars out there that have functional PCV systems and still blow dip-sticks out under wide open throttle.
Actually preventing pressure build-up in the crankcase requires a whole lot more venting than you're going to get from either one of the catch cans you guys are talking about.
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Look at a Supra and say that all again
No PCV valve, but the system runs to before the turbo and to the throttle body and effectively switches over whenever it's needed.
If you're blowing the dipstick out, you either have a clogged system or massive blowby (all the dumb kiddies putting filters on their valve covers because it happens on their 200K+ mile motors and saying PCV sucks)
Quote:
Originally Posted by King Tut
This car doesn't come with a PCV valve though. It just comes with a hose barb threaded into the crankcase, a rubber line, and a nipple on the back of the intake manifold. You either install a check valve to prevent the crankcase from being pressurized while still allowing the crankcase to vent during vacuum situations or you install a VTA catch can and don't allow the crankcase to see any boost or vacuum. I am fine with either solution, but I prefer the VTA so that no hot oily air has the chance to go back through my intake manifold and engine.
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You're ignoring the third solution (and a fourth, but using venturis in the exhaust is dirty as hell and would destroy a cat and fail any kind of inspection).
Quote:
Originally Posted by Sellout
I agree with you on that. Didn't realize these cars (or any for that matter) don't actually have PCV valves.
For turbo applications especially I'd rather have it VTA than give it a chance to coat the inside of my intercooler with oil. (No oil separator is 100% efficient)
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The small amount isn't going to cause any issues. When I pulled off my intercooler and cleaned it after 20+ years nothing drained out, I had to use solvent to get anything out and even then it was minor.