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Old 06-15-2002, 02:12 PM   #1
Scooby Specialist
Member#: 4106
Join Date: Feb 2001
Location: Expected whp/torque at 25 psi : 450
Default Important: what size feed and return line is everyone running ?

Please list the kit , turbo series (E or B) , water cooled or only oil , how low the turbo sits and is it sitting horizontaly or tilted back . Also list the geometry of your oil return (angle of line and location of return dumping) . It seems that more and more people are complaining of turbos burning oil and need to get to the bottom of this.
And oh , tell us if you complain of burning oil.

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Old 06-15-2002, 02:49 PM   #2
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Member#: 67
Join Date: Jul 1999
Chapter/Region: SCIC
Location: San Diego, CA
1999 Outlasting
the competition.


on the old kit i was using a -4 feed teed from the oil pressure sender(front of the block) and a -10 drain. never had any oiling problems. i dont think i would go any smaller than a -10.
also you need to make sure the drain is going down and not sideways or uphill.
hope this helps
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Old 06-15-2002, 07:51 PM   #3
Scooby Specialist
Member#: 8066
Join Date: Jul 2001
Chapter/Region: MWSOC
Location: Indiana,
Sedona Mars Red Pearl


OK, I have a once was ASR kit, oil cooled Turbonetics brass bushings with I think is a stage III super wheel or something like that.

My lines are once again I think # 10 return and a # 4 feed.

Oil is fed from the plug at the top back of the engine and returned at a 45` slope to a steel tube tapped into the pan at a 90` then the oil is dumped on to the upper oil baffle.

The turbo sat at a slight backwards tilt (meaning the exhaust port was facing towards the ground slightly) with the top of the turbo around the top of the engine block.

Problems YES oil was pouring out of my fresh rebuilt turbo in less the a mile.

PS thanks for the help in my post.
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Old 06-16-2002, 02:02 AM   #4
Scooby Specialist
Member#: 4106
Join Date: Feb 2001
Location: Expected whp/torque at 25 psi : 450

My setup is a T3/To4e watercooled from innovative turbo . It sit a little tilted towards the turbine housing also . Lines are -4 feed and not too sure about the return if its 1/2" O/D or I/D , I'll have to check later . Feed is from sender unit and line going straight down and goes in the pan at a 45 deg. My turbo sits very high too . I had burning oil problems with this turbo since day 1 when it was brand new from innovative . I rebuilt the turbo when I got my new engine and ran the turbo for a 1000 miles when I was breaking in my new enigne and it was still burning oil. So I decided to use a trick that some people do and put a restrictor in the feed line which seemed to fix the oil burning problem completely. BUT , now that the engine is broken into and I'm starting to put boost on it , my turbo has started to burn oil again and leak through the turbine housing. This turbo has only seen 1000 miles of non-boost driving and during the first 100 of boost the problem came back . I'm going to give this damn thing one last try , I will rebuild it , enlarge the return line and maybe even sit the turbo evenly and not tilted . we'll see

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Old 06-16-2002, 10:13 PM   #5
Scooby Newbie
Member#: 19340
Join Date: May 2002
Location: Melbourne Australia
94 Impreza WRX


The drain in the sump MUST BE HIGHER THAN THE LEVEL OF THE OIL, or it will not drain. hope this helps.
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Old 06-16-2002, 11:15 PM   #6
Scooby Specialist
Member#: 552
Join Date: Nov 1999
Chapter/Region: MWSOC
Location: Michigan
SOHC RS-Turbo EJ257
Tec-2 Aquamist 2D


I have a Vishnu turbo kit. I think it is a Turbonetics t3/t4 (Shiv was very secretive about the details, so I didn't ask anymore questions). It is both oil and water cooled. I can't say for sure if there is any tilt to it but it looks fairly level in it's mounted position and center line of the turbo is about the same height as the top of the engine block. The feed line is -4 and return is -10. I don't know if the turbo itself has a restrictor built into it on the oil supply side but the lines that came with the kit does not. I have seen my friend's HKS turbo actually has a restrictor built into it on the oil supply side.

I have about 500 miles of normal driving and boosting with no oil burning issues. One thing I did notice is that after installing the WRX oil pan, and filling the oil to the full line on the dip stick. There is quite a bit of oil flowing out of the return fitting welded on the side of the oil pan. So don't trust your dip stick! Remove your oil return line from the oil pan and let the extra oil flow out and use that as you new fill point. This is provided your car is parked on level ground and the fitting is welded as high as it can be on the oil pan. Mine is about an inch down from the top of the pan which is still well above the second baffle. Hope that helps!
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