|09-24-2010, 07:34 AM||#1|
Join Date: Feb 2010
Another crank case ventilation issue
I didn't find any thread about this issue I have, So here goes..
Thing is I'm just about finished with my build
Built ej207 with ej205 heads with 272 cams and running a rotated GT30R
The ej207 has 2 Vents, and the ej205 heads have only 1 vent each..
Also the original system uses the turbo inlet to create suction, but I don't have any inlet.
What is the best way to get simular suction as with the turbo inlet connection?
Some guys just close one Vent on the block and use the one that is also located in the ej205 blocks.. but then I also have to find a way to create suction somehow..
How have you guys cured this non turboinlet suction problem?
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|09-24-2010, 09:15 AM||#2|
Join Date: Sep 2007
Location: Plymouth MaVehicle:
07 STI Limited
TurboMike Tuned 2.35
I've been starting to use the element tuning Catch can setup for projects like that... it seems to fix all the ventalation issues i see. There are some threads showing alternative catch can setups that also work. I removed the pcv system on these cars too though.... that stock breather next to the turbo is just terrible. But thats just my opinion im sure there are many others. Good luck with your project
|09-24-2010, 10:30 AM||#3|
Join Date: Jan 2004
Location: South JerseyVehicle:
Also, if I understand the the PCV system correctly the suction created in the inlet is not what opens the PCV valve, its the pressure buildup in the crankcase. If I am correct about this I believe you could get away with simply using a valve cover breather like you see on older muscle cars. I would however use a catch can before the breather or things could get really messy.
|09-24-2010, 02:22 PM||#4|
Join Date: Dec 2005
There a few of use running hybrids such as the 2.5 turbo block. these have the second breather. We have been adding a second breather bung to each valve cover, then T it to the second block breather.
deff the best to do IMO. Even more important if you see high G's in autox track days etc. Oil slosh's to the outside head in the turn. with one breather on the valve cover it wants to suck up oil. the second breathers seems to equalize the Vacume/Pressure between the heads and the block.
I welded mine like Sidewayz posted in post 5 in the link above. I used a different T then he does, but over all its the same.
I think its the best option for us.
I tried to T the second block breather into my catchcan but I was collecting alot of raw oil. Then I plugged it and got some added oil consumption. I also was worried about blowing oil past my cam and main seals.
Another option that one or two builders recomended is to connect the second block breather to the turbo oil drain return line. this is almost impossible if you not running a rotated kit because of room.
I also like the idea of the equalization of the heads.
|10-05-2010, 03:43 PM||#5|
Join Date: May 2010
Location: Coppell, TXVehicle:
2008 LegacyGT spec.B
Bump for exact solutions.
I've got 08 LGT spec. B with:
FP Green HTA (less than 2k miles, 3.0" inlet, supporting FP free-flow oil line)
Crawford Catch Can
TiAL 44mm Wastegate (Replaced same time as FPGreen HTA)
PCV reinstalled (under guidance from Forced Performance 500mi ago)
Royal Purple 15w40
New spark plugs (installed under 1k miles ago)
Carbon clean service
Compression Leakdown test done: 0%
I'm losing 1qt every 300 miles. Smoke under heavy acceleration & then when I let off.
I've been advised that it's a crankcase pressure problem, but it hasn't changed with the reinstall of the PCV.
I don't know where else to look, I'm not getting any solutions.
Hope someone on here can give me guidance!
|12-01-2010, 11:28 AM||#7|
Join Date: Mar 2003
Location: 3MI Racing LLCVehicle:
96 bastard child
search FIRST, then PM!!!
Are you sure the guy doing your leakdown test knew what he was doing or that he actually did the test? because 0% across all four cylinders from a stock block with mileage is rather bizarre/impressive be it I don't know the mileage nor how hard you've been on her.
The smoke could also be from leaky valve seals but at 1 qt/300 miles, I'm going to lean towards a no in that column.
On a side not, why such heavy weight oil for a stock motor?
I'd be curious to have you plug the catch can's drain line and see how quickly you collect oil.
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