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Old 01-25-2009, 12:06 PM   #1
Scooby Newbie
Member#: 192866
Join Date: Oct 2008
Location: Rome, Ohio
2006 Impreza

Default Turbo Oil Drain line

I know that most guys drain the Turbo oil into the Valve cover however I would prefer not to do that for various reasons. Anyways I am going dry sump and that would leave the stock oil pump not being used. Having said that I woul like to use is as a path into the oil pan. There are two threaded plugs on the bottom and the right one was the pick up tube side. I want to remove that plug and tap for a 1/2" X 10AN male adapter for my return. I will be pluging the pressure side so there will be no cross flow. So here is my question, typically the turbo drain is primarly by gravity, however by using the plugged port the oil would have to upflow about 2 1/2" to dump into the pan. Is this going to be a probem for me or will engine vaccume created by the dry Sump oil system compensate for it and not allow the oil to back up into the drain line.
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Old 01-25-2009, 10:15 PM   #2
Scooby Specialist
Member#: 130489
Join Date: Oct 2006
Chapter/Region: MWSOC
Location: Superior, WI
02 WRX Wagon (WRB)
98 OBS-T, 91 Legacy SS



There's one way to find out for sure

My guess is that the system won't suck the oil away fast enough and you'll end up with it seeping past the seal and heading into the intake.

Is it reasonable to have a smaller holding tank for return oil with another pump or line that heads up to the dry sump holding tank?

I've not dealt with dry sump systems enough to intimately know how all of the different ways they can be configured.
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Old 01-26-2009, 03:25 PM   #3
Scooby Guru
Member#: 36333
Join Date: May 2003
Chapter/Region: NESIC
Location: East Kingston NH
98 RS
GT30R, closed deck madnes


dry sump eh ? gonna be a monster ! good luck with having a 12quart oil change...and 1/2 hour warm up time !
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