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Old 10-19-2009, 09:52 AM   #1
Odyknuck
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Location: Rome, Ohio
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2006 Impreza
Blue

Default Turbo drain line.

I "T" ed the Turbo drain into one of the Scavenge lines on the Dry Sump System. It seems to work well however on occasion (Hill climbing) I believe the scavenge line would get overloaded and not pull from the Turbo enough and the oil would back up into the Turbo, meanwhile the pressure side is still pumping oil and forces it past the seals and into the exhaust. I recently picked up a Peterson 4 stage oil pump and plan on using one of the Scavenge ports just for the Turbo drain. My question is two fold. 1) Will the pump try and pull the Turbo dry and not keep enough oil on the Bushings? and 2) should I remove the .060" resticter from the Supply line to allow more flow. It would seem that would work better. The system would push a lot more oil thru the Turbo and help it cool better. Thoughts please. Thanks In advance.
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Old 10-19-2009, 04:27 PM   #2
dangerousatom
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Location: Quakertown/AREA1320 391whp
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w/PPGS & 02 Wagon w/PPGs

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Where are you pulling the oil feel from? Taped head or oil block via the filter?

IMO its better to push oil through the turbo than pull it.
PUSH = no air bubbles
PULL= possible air bubbles
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Old 10-19-2009, 08:45 PM   #3
Odyknuck
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Removed oil sending switch and used that port. My oil pressure is 80 PSI cold and 50 Psi hot. I would think the oil pressure will push more oil than a scavenge will return.

Quote:
Originally Posted by dangerousatom View Post
Where are you pulling the oil feel from? Taped head or oil block via the filter?

IMO its better to push oil through the turbo than pull it.
PUSH = no air bubbles
PULL= possible air bubbles
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Old 10-19-2009, 10:07 PM   #4
dangerousatom
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w/PPGS & 02 Wagon w/PPGs

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Right then, Id just drill a hole in the pan and braze/weld a bung or return tube to drop the oil back into the mix. Id go at least 3x or bigger return line diameter than feed so as to keep back-pressure from forming On any turbo the oil feed is top and return is bottom, so no matter how steep the hill you climb your drain will go into the pan. Since the turbo is pressure fed via the sending unit hole you should never have a feed problem. Might I suggest a inline filter B4 the turbo......something like this:

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Old 10-20-2009, 01:10 PM   #5
Odyknuck
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Default Oil pan with no place to add Bung

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Old 10-20-2009, 03:11 PM   #6
dangerousatom
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w/PPGS & 02 Wagon w/PPGs

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Depending on how thick that pan delete or what ever its called, you cold tap that and put a 90 -6an fitting on it to drain into. The pan/bottom end should not have much if any oil pressure in it.....far less than even the open oil return from the turbo
Im assuming that oil pan delete thing is a dry sump piece. Try calling the manufacture and see what they think of taping it.

With all you have done to the car ( im assuming ) you must have an oil cooler, if its low, could you tee into that with the oil return from the turbo? The problem is that the turbos oil return is designed to just bletch the oil to where ever its "gravityed" to.....usually the pan. With out seeing the car/motor setup in person Im a bit reluctant to give any recommendations since I cant see where everything is and how you have the oil feed/return setup routed.
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Old 10-20-2009, 03:38 PM   #7
Odyknuck
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Link to motor swap in my offroad car:
http://www.woodsbuggy.com/index.php?...hp&f=33&t=6013
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Old 10-20-2009, 04:10 PM   #8
dangerousatom
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2002 04STi Swaped RS
w/PPGS & 02 Wagon w/PPGs

Default

Good God Man! that is ridiculous!!

After seeing it, there's a few option I would think?

- Tap the pan like I said
- Use the capped off old filter fitting . . . . . since there is no stock pump to be making pressure/suction there, its basically a caped hole in the block
- Hell you could drop it into the oil filler neck....if you made a neck riser block with a -#an fitting on the side
. . . . . I doubt that head would get that much hotter than the other?!?


With the turbo set so high it will not be a problem anywhere there is oil with no oil pressure.
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Old 10-20-2009, 09:30 PM   #9
Odyknuck
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The capped off oil filter fitting was temperary. It is actually the oil pressure feed line from the Peterson oil pump now. The other oil filter port is tapped and plugged behind the gutted OEM oil pump housing.
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