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Old 08-12-2010, 06:38 PM   #51
Ryan314
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^Thank you for that information. So on the STI, the plastic/metal pipe that connects the valve breathers, is that a 5/8 hose fitting?

We installed a crankcase evacuation system on mine yesterday. Welded a bung and check valve to the downpipe at a 45 degree angle. A hose then goes from the check valve to the crank case port (near the turbo) and PCV.

It certainly works, providing constant vacuum to the crank case.

Will it cure my oil consumption problem? Time will tell.
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Last edited by Ryan314; 08-12-2010 at 06:44 PM.
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Old 08-13-2010, 12:12 AM   #52
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Im not using a check valve in my evac system. I just deleted all of my pcv stuff and welded this in
http://vibrantperformance.com/catalo...oducts_id=1243
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Old 08-15-2010, 10:43 AM   #53
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Quote:
Originally Posted by sidewayz View Post
Im not using a check valve in my evac system. I just deleted all of my pcv stuff and welded this in
http://vibrantperformance.com/catalo...oducts_id=1243
Do some testing. Hook a boost gauge up to your crank case vents. We did not have very good results with a similar part. Crawford had similar experiences when they tested the same set up.
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Old 08-16-2010, 02:47 PM   #54
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600 miles later. motor is still fine, no smoke, no oil loss. She's working as planned
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Old 08-16-2010, 02:53 PM   #55
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Cool stuff. It may have just been the motor that it was on. It had excessive blow by any ways from a mechanical issue.
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Old 07-12-2011, 03:41 PM   #56
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Wanted to bring this up from the dead has anyone got any more to add to this thread?
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Old 07-16-2011, 02:40 PM   #57
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I have mine un-capped, and T'eed into the drivers side head breather. I recently tore down my intake and noticed a lot of oil through out the intake track... I have been consuming around 1/2 quart every 1000 miles. I purchased a catch can last week and will install it in line with the breathers to capture the blowby.

On a side note, I posted many many times years ago concerning leaking cam seals, and sure enough I went through 2 or 3 of them right after my initial build due to having the port blocked!
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Old 07-16-2011, 02:46 PM   #58
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Quote:
Originally Posted by Paulys05wrx
I have mine un-capped, and T'eed into the drivers side head breather. I recently tore down my intake and noticed a lot of oil through out the intake track... I have been consuming around 1/2 quart every 1000 miles. I purchased a catch can last week and will install it in line with the breathers to capture the blowby.

On a side note, I posted many many times years ago concerning leaking cam seals, and sure enough I went through 2 or 3 of them right after my initial build due to having the port blocked!
You are consuming oil because you have an OIL breather t'd into a vapor line.
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Old 08-01-2011, 10:34 PM   #59
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Sorry if this is going to sound dumb but I'm going to throw it out there anyway:

Has anyone tried running a catch can and an AOS?

1) The catch can for the head breathers and pcv

2) the AOS would be for the 2nd crankcase vent.

Anyone?
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Old 08-06-2011, 01:17 AM   #60
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i am running a grimmspeed aos and have the center breather t'd in with the other breathers and have no issues with blowby.all of the hoses are oil free!
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Old 08-08-2011, 07:38 PM   #61
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I've posted this elsewhere. But here it is again.

I think this is a great picture for this (borrowed from slorice):


For 2.5 heads - it makes sense to hook up the new 2.5 block breather.
For 2.0 heads...[/quote]

Good Reference, here is how my Hard Breather line ended up. 200 Miles on New Hybrid, with 272 Cams, No problems yet. still tuning.
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Old 10-08-2011, 12:17 PM   #62
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Double post

Last edited by 5lipstream; 10-08-2011 at 12:23 PM.
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Old 10-08-2011, 12:23 PM   #63
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On the 257 valvecovers, the plastic piece has dual barb fittings where the 205 has only one. My question is: on the 257 piece, are the 2 ports simply side by side and go to the exact same place in the valvecover or are they separated? I'm just wondering if I machine a new piece that has dual fittings to replace the plastic single port piece if that will work for the center crank vent routing.
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Old 10-11-2011, 07:37 PM   #64
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Quote:
Originally Posted by sidewayz View Post
Im not using a check valve in my evac system. I just deleted all of my pcv stuff and welded this in
http://vibrantperformance.com/catalo...oducts_id=1243

how well is this working for you and teh motor?

i am in the same boat as everyone else, i have ej257 hybrid setup and need to do a catch can or might be thinking this route as i would not have to worry about emptying it.
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Old 10-13-2011, 02:02 AM   #65
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anyone have any input or experience using the evac setup way instead of a catch can?
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Old 10-13-2011, 10:01 AM   #66
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Quote:
Originally Posted by quicksubie
anyone have any input or experience using the evac setup way instead of a catch can?
Why don't you do both? Have a catch can in line with the exhaust evacuation line and check valve. You could probably even drain it back into the pan if you wanted to.
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Old 10-13-2011, 06:32 PM   #67
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Quote:
Originally Posted by sorrowfulkiller View Post
Why don't you do both? Have a catch can in line with the exhaust evacuation line and check valve. You could probably even drain it back into the pan if you wanted to.

then what would be the point of a catch can with the evac setup also?

my whole point in the catch can vs evac setup is that the evac setup there is nothing to drain it just gets burned up ones it hits the dp, catch can i will have to empty it and i dont feel like going the routing it back into the pan way either.
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Old 10-13-2011, 11:28 PM   #68
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anybody else have any input on this or experience with a evac setup.

theres got to be more people that can help shed some light on if this evac setup will work and or how it would work.
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Old 10-16-2011, 10:55 AM   #69
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Quote:
Originally Posted by quicksubie View Post
then what would be the point of a catch can with the evac setup also?

my whole point in the catch can vs evac setup is that the evac setup there is nothing to drain it just gets burned up ones it hits the dp, catch can i will have to empty it and i dont feel like going the routing it back into the pan way either.
The point of it would be that the exhuast velocity creates a vacuum, pulling the oil through the hoses into the catch can where it will hit some turbulence (in a proper catch can) and then be drained out the bottom back into the pan. That way you don't have to ever drain it and it will always have a true source of vacuum, unlike the intake pre-turbo, which would pull way too much vacuum and just suck it right out of the catch can. Honestly its the best way unless you buy an air pump and use that as your vacuum source.
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Old 10-23-2011, 03:02 AM   #70
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I'm running a Ej257 Shortblock with 2.0 Heads. Tomorrow I will be taking off my valve covers and tapping both VC's then T'ing the center crank case breather into the VC's.

I will update as soon as i finish.
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Old 10-23-2011, 09:58 AM   #71
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I want to caution you guys about draining your catchcan back into your oil pan. What gets caught in the can is not just oil. You have unburnt fuel and condensed water vapor in there too. Dumping that back into the system is a recipe for disaster. Don't believe me? Empty your can into a glass jar and let it sit a while to separate. Yuck.

Edit: for clarification, running the line from the center, unbaffled port on the 2.5 block into the valve covers is correct. What I stated above is in reference to the mess the catchcan pulls out of the other ports.
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Old 10-23-2011, 01:45 PM   #72
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If its draining back to the pan its a air/oil seperator, a catch can does just what its called. Im using the crawford aos and have been thinking of using a evac bung instead for vaccum, the large turbos pull way too much. Also the stuff that drains back to the pan will get burnt back up after the motors warmed up. I havent had any problems with it other than it pulling more vapor through it than I want after some high boost runs.
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Old 10-23-2011, 06:18 PM   #73
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I think you are fine with the Crawford piece as it was designed properly. The Grimmspeed AOS is a terrible design.
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Old 10-27-2011, 02:53 PM   #74
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Can someone clarify the need for this. Is it just for high boost applications?
I am building a MILD hybrid using the stock TD04, Tuned for E85. Not sure how much boost it will be capable of? 15PSI maybe if I'm lucky.
Can I cap the extra crankcase breather? Or maybe just run the breather to ONE of the valve covers?
Seems like the pressure under the valve cover should be equal to the pressure in the crankcase, so what is the point of the plumbing?
Thanks
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Old 10-27-2011, 04:30 PM   #75
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Wouldn't an AOS solve this problem?
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