PCV / Oil Catch Can setup - Need some advice on an install

[ErikTande]

http://www.dsmtuners.com/forums/articles-engine-fuel/366890-4g63t-pcv-system.html

I was reading this ^^ article to fix my dipstick popping up problem (giggity), so I decided to go with Setup #1 (PCV Setup #1 – The Improved Factory Setup.) I ordered a catch can to go between the intake manifold and the valve cover, along with a new PCV valve and a Kynar check valve.


I took the setup to a local shop for install, and they said I'd be better off with this setup (pic below), with boring out the PCV valve so it's open all the time. I said OK and they did the install.

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I re-read the article, and that can't be the best option for street use / daily driver, right? My catch can only has two connection options, I would need a third to the inake for this to work properly, right? Or is it fine the way it is? This is my catch can:

http://www.extremepsi.com/store/product.php?productid=20383&cat=731&page=1

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[T is for TURBO]

I didn't, the guy that installed it did, he explained it was the best setup for this catch can. My fault for not fully understanding the difference before I ordered it. I was going to do this setup (http://www.dsmtuners.com/forums/articles-engine-fuel/366890-4g63t-pcv-system.html) and ordered the catch can, new PCV valve and check valve. Problem is I ordered a vented can, not a sealed one.

I still have the new PCV valve and kynar check valve, I'm going to install them when my new (sealed) catch can gets here this week.

Good deal

 

[boost97gst]

You dont NEED the pcv. It can be very effective just running both VC lines to a sealed catch can then a line out to pre turbo(or IM with a check valve of course) Whatever effectively controls cc pressure and is the simplest is always the best.
When i go through my setup this year im ditching pcv alltogether and running what i said above. One less place to have a boost leak, right?

 

[T is for TURBO]

You dont NEED the pcv. It can be very effective just running both VC lines to a sealed catch can then a line out to pre turbo(or IM with a check valve of course) Whatever effectively controls cc pressure and is the simplest is always the best.
When i go through my setup this year im ditching pcv alltogether and running what i said above. One less place to have a boost leak, right?

Correct. But the stock PCV location is going to produce more draw than the turbo will while in a non boost condition. More draw=less CC pressure/gasses. So for a stockish setup, I think the factory setup is the way to go.

Again, it's totally up to the person. I personally will be running two -10s off the VC into a sealed can with a line going to the intake snorkel. So far I have no plans to utilize a PCV valve as I'm more concerned about the crankcase pressure at 25-30 psi boost pressure, than I am with the 1-2psi the crankcase will produce during cruise.

 

[BowDownRacing]

Why is a vented can not optimal for "these" vehicles, when every compoany in the market offers them as vented? I personally have installed numerous catch an setups on alot of cars, granted I never have on a dsm so my question is what makes these different from any other boosted application? Im not trying to thread jack or anything but I was gonna post a respons and then I read what some are saying so I would like to know why and if its been proven, have any cars been on the dyno and tried both style catch cans, has anyone ever mad a full pass with a sealed can then another pass with a vented can to prove their theory??

 

[eclipsh]

This is how I have my system routed. *** The catch can is NOT vented. I noticed that on the diagram after I edited the picture and posted.

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As you can see, I eliminated the PCV valve. I have replaced it with a 1/8" pipe fitting I bored out for maximum flow. This runs to the intake of a catch can.

I have two vacuum sources attached to the outlet of the can, the additional one is shown in yellow. Both lines have check valves. When the intake manifold is under vacuum it shuts check valve #2 going to the intake pipe so it acts like a normal PCV system with a catch can in line.

Normally the PCV closes when the intake manifold is under pressure so the breather port stops functioning. With this setup when the intake manifold is under pressure it shuts check valve #1 and check valve #2 opens so the intake pipe pulls fumes from the valve cover. This way the PCV port is always being used so flow is maximized.

I've also opened up the other breather line to the cover to 1/4" pipe and also have a catch can on it, though it isn't shown on the diagram.

This setup allows for maximum use of both stock breather locations on the valve cover without welding big fittings on.