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Old 08-05-2016, 12:50 AM   #301
ITS_SOY
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Quote:
Originally Posted by joek92 View Post
Saw the perfect configuration at IA and now running it.

Dual can
1. T in from valve cover breathers, out to turbo inlet
2. In from crankcase, out to pcv

This requires relocating the pcv itself. Unfortunately there are a bunch of random hose diameters. But it's the only way to filter everything.
Would you have pictures of this setup?
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Old 08-09-2016, 04:21 PM   #302
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Yes, behold this ms paint masterpiece.

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Old 08-09-2016, 10:23 PM   #303
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That's impressive
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Old 08-16-2016, 11:32 AM   #304
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Originally Posted by Prosport Gauges View Post

That's impressive
Thank you. Can't take credit for the idea, saw it on a white hawkeye at Import Alliance Atlanta. Smart guy.
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Old 08-18-2016, 03:15 PM   #305
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Looks like the main benefit of that system is that the pvc valve is after the catch can which would keep the pvc valve cleaner?
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Old 08-19-2016, 11:44 AM   #306
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Quote:
Originally Posted by Jonahhaddad1 View Post
Looks like the main benefit of that system is that the pvc valve is after the catch can which would keep the pvc valve cleaner?
Because the pcv has 2 outlets, this is the only way to filter both using one can.

That allows the second can to be used for valve cover breathers or whatever.

Last edited by joek92; 08-19-2016 at 03:06 PM.
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Old 10-15-2016, 08:33 AM   #307
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Could someone help me create a catch can setup for an 06 ez30d Tribeca? I know it is naturally aspirated. I am getting a pretty bad plume of blue smoke at startup and would like to at least eliminate that.

I know that if I am getting blowby I have much more to worry about bla bla bla.

Anyways, could you all please help me with a setup?

Thank you!
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Old 10-19-2016, 04:40 PM   #308
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A catch can won't help start up smoke from worn rings or valve guide seals.

All an NA car needs is a single two port can between the PCV line and intake manifold.
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Old 10-23-2016, 01:56 PM   #309
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Correct, or between the block and pcv if it has 2 outlets. Sorry that might be hard to understand without pics.
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Old 10-26-2016, 06:49 PM   #310
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Thanks guys. There are 2 ports on it. My research shows that all I need to do is install 2 catch cans. One coming off the PCV to wherever it goes, and one coming off the breather right next to the PCV to wherever it goes.

Under what circumstances would a catch can stop smoking at startup? I have read that it can, but just wasn't sure *when*. I mean the cans will at least serve as a nice diagnostic tool.
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Old 11-22-2016, 04:40 PM   #311
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Quote:
Originally Posted by jj94auto View Post
Thanks guys. There are 2 ports on it. My research shows that all I need to do is install 2 catch cans. One coming off the PCV to wherever it goes, and one coming off the breather right next to the PCV to wherever it goes.

Under what circumstances would a catch can stop smoking at startup? I have read that it can, but just wasn't sure *when*. I mean the cans will at least serve as a nice diagnostic tool.
If there is a bunch of oil in the throttle body or intake tubes. Which means it would either come from crankcase or valve covers.
Now, I don't know what problems cause the oil/coolant vapor concentration to be higher in either. I assume that something is getting into the combustion chamber, so a catch can would rule out anything coming through intake valves. The other points of entry are piston ring and head gasket. My old sti smoked on start up, cyl 3 had 90 psi compression.

Recommend doing a leak down test. Not too hard and will properly identify the issue.

*whatever is leaking, it seals after the engine warms up... thermal expansion. Hope that helps.
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Old 11-22-2016, 06:52 PM   #312
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anyone have any photos of a dual catch can set up on car that have no PCV valve ? do you just hook 1 to the crank case to intake then the other 1 to the breather ports on the heads and intake ? thank you
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Old 12-12-2016, 11:04 PM   #313
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Quote:
Originally Posted by joek92 View Post
If there is a bunch of oil in the throttle body or intake tubes. Which means it would either come from crankcase or valve covers.
Now, I don't know what problems cause the oil/coolant vapor concentration to be higher in either. I assume that something is getting into the combustion chamber, so a catch can would rule out anything coming through intake valves. The other points of entry are piston ring and head gasket. My old sti smoked on start up, cyl 3 had 90 psi compression.

Recommend doing a leak down test. Not too hard and will properly identify the issue.

*whatever is leaking, it seals after the engine warms up... thermal expansion. Hope that helps.
It does help.

Well I finally got around to installing 2 Ebay VMS style baffled catch cans. The one from the PCV is filling up very quickly, but it *seems* to have stopped the blue smoke at startup so ignorance is bliss for me.

Any way to run the drain of the can via tubing outside of the frame so that it doesn't fill up so fast...strictly for offroad use...COUGH COUGH or alternatively outside the frame with a valve so that I could empty it easier than having to dismount it every 300 miles?
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Old 12-13-2016, 04:28 AM   #314
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on right, there is this thread..

has anybody tried to drain a catch can/aos into the turbo oil drain?
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Old 01-06-2017, 07:19 PM   #315
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Quote:
Originally Posted by bmxhotsauce View Post
anyone have any photos of a dual catch can set up on car that have no PCV valve ? do you just hook 1 to the crank case to intake then the other 1 to the breather ports on the heads and intake ? thank you
I'm using the Radium Engineering standard catch cans. One hose from the crank case to one catch can. A hose on each breather port of the left and right valve covers T'd together to another catch can's inlet port using the oem steel pipe but a T fitting near the windshield wiper reservior. Then I have both exit ports from both cans Y'd together ran under the car all the way to the rear next to the muffler. On the dyno at high boost, a blowby gunk spits out of the end of this hose.

Last edited by methaddict; 01-06-2017 at 07:24 PM.
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Old 02-02-2017, 09:07 PM   #316
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Originally Posted by 2002Dubx View Post
Easiest way to run it is below. It's not all that hard really.



what is the direction of flow for that setup across the crankcase vent cross over tube
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Old 04-27-2017, 11:09 AM   #317
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Quote:
Originally Posted by jj94auto View Post
It does help.

Well I finally got around to installing 2 Ebay VMS style baffled catch cans. The one from the PCV is filling up very quickly, but it *seems* to have stopped the blue smoke at startup so ignorance is bliss for me.

Any way to run the drain of the can via tubing outside of the frame so that it doesn't fill up so fast...strictly for offroad use...COUGH COUGH or alternatively outside the frame with a valve so that I could empty it easier than having to dismount it every 300 miles?
Don't drive with the drain open or it won't pull a vacuum & you'll have a post-MAF leak. (unless I took it wrong)
Vacuum sucks out fumes when there isn't enough pressure to push them out.
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Old 05-10-2017, 07:14 PM   #318
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I'm trying to figure out how to set this up on a supercharged EJ253 .

Obviously the 2 stock breathers that go into the intake can't be there because they would be pressurized. I assume these go to a catch can (vent/intake to/from atmosphere OK?). I've read that this air needs to be metered going into the breathers, so how can we do this with a blow through supercharger?

What about the PCV.. Do I need a separate catch can that sits in between the PCV and the intake manifold?
Will the PCV even work properly, since it will mostly be operating under boost instead of vacuum?
help!

Last edited by pcampbell; 05-10-2017 at 08:33 PM.
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Old 01-16-2018, 08:42 AM   #319
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I have a 2009 SH XT Forester.

Picked up two catch cans for a dual setup, but got a bit confused on how to actually plumb it up correctly.

There is a mishimoto YouTube video, but it confused the hell out of me....

Has anybody installed a catch can and can give me some pointers or advice on how to plumb them up ?
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Old 01-16-2018, 03:15 PM   #320
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Quote:
Originally Posted by Booki View Post

Has anybody installed a catch can and can give me some pointers or advice on how to plumb them up ?
As you might imagine, there is a ton of mis-information on catch can installation on the 'net. It's apparent a lot of people have no idea how the PCV and breather system work.

I installed two oil catch cans on the EJ20K in my '98 JDM Impreza STi wagon. I'm very pleased with how well it all appears to function. I don't know how different your Forester's breather system might be from what I have, but you can have a look at this thread HERE where I was involved in a discussion on this topic.


Last edited by Vancouver98STi; 10-25-2020 at 11:04 PM. Reason: Replaced missing image
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Old 01-27-2018, 03:13 AM   #321
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do you need 3/8s fittings on the catch can?
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Old 02-03-2018, 12:56 AM   #322
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Quote:
Originally Posted by fleezy View Post

do you need 3/8s fittings on the catch can?
I found this image online of what I used, Watts A-385A (1/2" ID x 3/8" MIP)... which meant I also had to re-tap the threads (3/8NPT18) in the catch cans.


Last edited by Vancouver98STi; 10-25-2020 at 11:06 PM. Reason: Replaced missing image
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Old 03-17-2018, 10:05 PM   #323
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Just quick question. if i were to vent a catch can/air oil separator i would need a tune right since im still using MAF? but when i switch to Speed density i wouldnt need one at all?
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Old 03-18-2018, 10:57 PM   #324
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Originally Posted by KCRS01 View Post

if i were to vent a catch can/air oil separator...?
What's the benefit of venting a catch can/air oil separator?
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Old 03-26-2018, 10:52 PM   #325
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Quote:
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What's the benefit of venting a catch can/air oil separator?
when you use a closed loop system the oil just recirculates in the system, meaning, if it has dirt/contaminants it just go back to the engine.

while vent to atmosphere AOS vents the oil going to the pipe and going to the street. the dirty oil in the system is then completely removed and not recirculated.
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