Gumboguy

btw - according to my FSM, oil pressures are 98kPa(14psi) @ 600rpm, 294kPa (43psi) @ 5000rpm

 

Thank you for the answer to the pressure.

 

hats really not good news for me. ;-)

 

!4psi is below OEM garrett turbo specs, No? How can that be that my oil pressure in a JDMej20 TT be som dang much higher than that? Its stock inside, stock injectors and fuel rail. The case has not been open.

 

What causes high oil pressure and what can be done to lower it?

 

Please advise.

Thanks again. :-)

I arready have an external waste gate, so the vf27 looks attractive from a less hassle standpoint. I don't think I will mind the turbo maxin out around 4k. I don't intend play hardball with this motor. I recon a t4 compressor has more range?

I'm hung up on having the exhaust set up rewelded to accommodate the stock Subaru flanges only to find that I still get an oil leak in the replacement turbo because of something I failed to diagnose and catch with this current one. With so.many variables of Subaru flanges on turbos, It seems like I would easily set myself up for having the rarest set up to find a replacement for. Lol.

Thanks again. :-)

I have added a 1/32" restricter (a brass welding rod cut to 3/8" long and drilled to 1/32 fit inside the 90 at the oil inlet). This restriction has reduced the oil feed flow volume, but it still leaks out the piston ring (presumably). I say that because the drip forms at that part of the turbine housing. It seems no matter what I do to the oil in or the oil out, it still leaks.

 

I am temped to replace the t3/t4 turbo with one of the twin turbos that came with the motor stock. Would that be so bad? Lower end power with faster spool? But what happend when there is no secondary turbo to kick in?

 

Oh, thank you for the link to the Outback thread.

 

Please advise. :-)

Im not using the banjo bolts. This turbo didnt have them. I have a -3 AN 90 degree to 1/8 npt in the inlet. If I go to a vf27 stock turbo, I will be using the stock banjo bolts for oil feed as well as coolant.

 

Thanks for the swift reply.