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Old 10-01-2006, 01:00 AM   #1
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Default PCV, how should I run it?

Right now I have the stock set up off the intake manifold. The short hose strait to a stock pcv valve. On the exhaust side I have a hose running to a barb in the U pipe AFTER the afm and BEFORE the turbo.

The problem I'm having is oil is leaking into the turbo. I dont understand PCV systems too much, and I read M2Cupcars post to the honda tech forum. From what I have read the setup I have now is almost ideal. Should I just install a catch can and be done with it? I'm just so confused. I was going to get the 323 GTX PCV valve, but none of my local stores have it. Can you guys help me set it up so it stops leaking oil into the turbo inlet? Thanks.
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Old 10-01-2006, 01:20 AM   #2
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Get the different PCV valve, that should help.

Or you could try an inline fuel filter between the crankcase and the intake plumbing. It would probably help catch some of the oil, similar the way that a catch can would.
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Old 10-01-2006, 01:58 AM   #3
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you should put a breather filter on the exhaust side and intake side and block of those power robbing ports. Brian and Braineack are gonna kill me for saying that but it is true. dont waste your precius vacuum on oil.
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Old 10-01-2006, 02:35 AM   #4
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Hey, magna, go read up on this: http://www.dragstuff.com/techarticles/vacuum-pumps.html

That'll get you started. Yeah, I guess if you want less horsepower, extra blow-by and a decreased engine life, go ahead and just run breather filters on your crankcase vents Oh, and a turbo cartridge that doesn't drain as well, leading to decreased turbo lifespan is an added bonus!
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Old 10-01-2006, 02:53 AM   #5
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my chra drains just fine :P but i do run straight down to just in front of the motor mounr, and use:P an oversized diameter line.
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Old 10-01-2006, 01:40 PM   #6
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Quote:
Originally Posted by magnamx-5 View Post
you should put a breather filter on the exhaust side and intake side and block of those power robbing ports. Brian and Braineack are gonna kill me for saying that but it is true. dont waste your precius vacuum on oil.
Yes we are, cause there is absolutely no ******* reason to keep spreading this bullshit to everyone, quit it dude.
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Old 10-01-2006, 01:48 PM   #7
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Quote:
Originally Posted by miataspeed1point6 View Post
Right now I have the stock set up off the intake manifold. The short hose strait to a stock pcv valve. On the exhaust side I have a hose running to a barb in the U pipe AFTER the afm and BEFORE the turbo.
This on a GReddy kit? are you using the GReddy style return line?

Even with vacuum on the crankcase you might still have a poor drainage system.

Are you burning oil?

Make sure boost is not entering the crankcase, so make sure your PCV valve is working properly.

Some oil in the intake can be filtered out with a catch can.

Please ignore anything Mangamx-5 will tell you about crankcase ventilation or the PCV system. Yes you can run an open crankcase breather filter, but with adverse effects on most systems. It may work on his system, but most people do not want an impropely plumbed system, he still has yet to get this through his head.
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Old 10-01-2006, 02:39 PM   #8
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Booyeah!
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Old 10-02-2006, 01:22 AM   #9
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I do agree, the PCV is there for a reason. It is on a greddy kit. I drilled the pan, used -10AN line. It isnt strait down, but it's no where near flat spotting at any point. I'm not burning any oil, and none is coming out the tail pipe. When I pull the U shaped pipe with the PCV hose there is a big splat of oil on the opposite wall. Its not pooling on the turbo.
The PCV valve is brand new. After looking threw all my high performance magazines, my set up seems to be the norm. I've checked for any vacuum lines that would cause boost into the crankcase and found none. Only thing I can think to do is add a catch can between the valve cover and U pipe.
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Old 10-02-2006, 09:31 AM   #10
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Originally Posted by miataspeed1point6 View Post
Only thing I can think to do is add a catch can between the valve cover and U pipe.
Yup, that would probably be the next plan of attack. Sounds like you've probably just got a tired engine with a lot of blow-by, or, as the shop manual for the 200SX stated: "brow-by."

I **** you not.
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Old 10-02-2006, 09:55 AM   #11
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haha. A little bit of oil ain't going to hurt anything the intake. You should have seen the amounts of oil that pooled in my 626 turbo.
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Old 10-02-2006, 10:09 AM   #12
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Well, it'll begin pitting and hurting the compressor blades, actually. I remember seeing pics of pitted compressor blades on a pre-compressor water-injection setup, and that was with a special bracket that held the nozzle right over the compressor shaft nut, so as to minimize damage and the much finer spray mist of the water...don't underestimate the amount of damage that can happen when you've got little particles being thrown at a fan blad spinning at 100,000 RPM.
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Old 10-02-2006, 10:32 AM   #13
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always gotta one-up me.
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Old 10-02-2006, 12:08 PM   #14
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Booyeah...you betta recognize, fool!
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Old 10-02-2006, 02:35 PM   #15
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Quote:
Originally Posted by miataspeed1point6 View Post
I have a hose running to a barb in the U pipe AFTER the afm and BEFORE the turbo.

The problem I'm having is oil is leaking into the turbo.

Can you guys help me set it up so it stops leaking oil into the turbo inlet? Thanks.
Keep it the way you have it. Put a filter inline. Air passes through, oil does not.

No. I didn't keep it this way. (!) A hose runs from the end of the filter to the intake, just as you describe your setup above.
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Old 10-02-2006, 09:49 PM   #16
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My engine is in great shape. It turned 56K on the drive home. I ran a compression test when I got it and just before turboing and all was well within spec. I think I'm just going to run a catch can. From all the websites I've been reading on, this sounds like a normal thing. Thanks for the input.
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