Both the cc vent and the pcv vent are going to the can now until I get a good pcv valve. Stupid simple build - one pvc union, two pvc plugs, three brass right angles and some plastic tube that expoxied on for the filter. The bracket is some aluminum anchored under the AC line bracket with some hose clamp tank mounts riveted to it.

Hooray for more people in the "screw pcvs" club. Open breathing for the win

it only looks that way when I'm on track (off-road) in the state of GA

Haha, I ditched mine this weekend also. I just did what Scott did and gutted the pcv and put a filter on it.
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I've been pushing Open for what feels like forever . It's nice to see people realize that even using a turbo pcv setup... open is just simpler and works

Works is right - but you lose the ability to scavenge those gases/vapors under vacuum. For a turbo car that doesn't see a lot of boost, mostly traffic driven, I think it's important to keep that part of the system for that reason.

simpler, yes, works, half the time, yes, the other half, no.

Edit : I was slow to post, what rob said exactly!

both my turbo miatas have no PCV valve. too risky. as soon as my dipstick blew out of the tube at 17psi i did away with that problem.

Yeah, I really want to do the catch can thing. I would like to be able to suck it all dry with the manifold, on the other hand, my stock-location feed right now has so much oil pouring into the turbo that I thought I'd blown a bearing. :-)

I was planning on digging up that other thread from a couple months ago to come up with a good layout.

How do you know 100% that you solved it by not letting boost in as opposed to letting twice as much blowby out? Unless you measured flow through that tube I say you can't know for sure.

One day when rob finishes his setup it will be the most kick areseseest one around. 1x pcv, 2x oversized out = ftw.

Fred.

too bad you don't have a 1.6L, then you could attach a drain to the stock location next to the oil filter.

Hmm, you think I should T in the catch can to my oil return from the turbo?

He fixed the problem with his dipstick blowing out. Odds are it is a leaking pcv valve if you've got blow-by. If it's not, then what? rings? and most here will probably just run their stock bottom ends until the MUST rebuild them.

I actually did that when the can was over on the other side. Made a Y junction pipe to share the oil drain. I've got to build another oil pan so I'm just build in another bung for that purpose.

I've yet to see it, but word is under very harsh conditions (track events) the captured oil gets heavily contaminated with water, creating an oily froth. So that might be a reason not to dump it back in.

I'm going to do this with mine.

I've seen it.... happened on my WRX. It looks kind of like oil, but kind of milky and definitely not something I would want going back into my motor.

Your too funny...

ALL engines have blow by :-) when you feed an engine 15psi you approximately double how much there is. Even if the rings are in perfect condition. Doubling how much there is and not giving it an extra way out = pressure. Doubling the way out under load is likely enough to alleviate that pressure.

Fred.

I was just doing some washing up and thinking about why I bother even trying to post sensible things into these threads and remembered something which I just know you will find very interesting.

Remember this :



Dip stick was 4 inches too high after a lap. The hose from the end of rocker went straight down and out the bottom with no bottle/restriction at all. NO turbo. ie its marginal in stock form when thrashed hard. Of course that must have been caused by magic boost dust leaking past the pcv valve right...

;-)

no, the problem was there were rockers in an mx6

I think the real problem was that the vent hole is about 1/8" - hard to blow through, so I'm sure it's equally difficult to vent blow-by thru

Anyone ever think to use a 19mm straight through bypass valve from a Supra, or similar, in lieu of a PCV valve? Other than me that is...