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Old 08-15-2017, 11:50 AM   #26
Scooby Newbie
Member#: 269226
Join Date: Jan 2011

Originally Posted by stevieturbo View Post
It's hard to beat the simplicity of a large vent to atmos.

Unless the can/separator is exceptionally good ( and almost none are ) routing the vent anywhere on the intake path, will allow oil or dirty oil vapours into the inlet path.

And if you are wanting to connect it to the actual intake where it will see vacuum....then it 100% must have a proper working PCV system in place so boost can never blow into the crankcase...and when on boost it must have a good clear method of venting.
Yes, yes, and yes. Just because it's harder doesn't mean it's not the proper thing to do
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Old 08-15-2017, 01:28 PM   #27
Scooby Specialist
Member#: 416107
Join Date: Mar 2015
Chapter/Region: International
Location: Ontario, Canada
2002 WRX Wagon
EJ207 Spec C 4EAT

Default BW s362 oil seeping

put the line pre-turbo. under normal cirmunstances, boost will never enter the crankcase and the suction from the turbo will give you vacuum.
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Old 11-06-2017, 07:54 PM   #28
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Member#: 279176
Join Date: Apr 2011
Location: Manitoba, Canada
2006 Sti

Default BW s362 oil seeping

Well the car is away for winter, so I took the turbo off. No oil was getting into the exhaust wheel, just leaking between turbo center housing and that loose shield that gets sandwiched by the housing. Then it would leak out from where the turbine housing meets the center cartridge. Also a TINY amount of oil getting into the compressor housing. But not much. I did some reading on the OPR by Turbosmart and it looks like it regulates the -4 AN feed pressure to 40psi? Is that enough? At high rpm/boost?

Itís just really annoying to have a car thatís running great but burns oil on the outside of the turbo. I can literally see it smoke out of my hood sometimes.

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Old 11-10-2017, 07:07 PM   #29
Scooby Specialist
Member#: 243992
Join Date: Apr 2010
Chapter/Region: MWSOC
Location: Morton Grove, Illinois
2006 WRX TR


Your issue looks identical to mine, I am also looking into that OPR as well.

I got tuned yesterday and had no issues with oil seeping. Itís so random itís weird. I think I have narrowed it down to high oil pressure on cold starts or prolonged high RPM such as highway driving at 80+mph.

Instead of a restrictor I think Iím gonna look at the OPR and no restrictor. I want to call BW sand see what the operating pressures are. I was reading itís around 50-60 recommended possibly. I could be wrong though.

Iím also not sure where Iíd route the return line with the car still together.
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