Oil feed lines for FP old school red

[rebelboost]

I rebuilt a new block(my 1st DSM rebuild) with all new internals and added a BSE kit. While tearing down the car I found out my big 16g was damn close to blowing up. So, I am thinking about upgrading turbos from the big 16g to the FP old school red. So, here is my question. With this Old school red turbo, should I run a oil feed line with a restrictor from the OFH or the head? I know the OFH has high oil pressure even with out the BSE kit. also, I read on the forums that the FP old school red has a built in restrictor, is two restrictors on the same line bad? Even if they are the same size? Also, this old school red is a JB turbo, so high pressure isnt as bad as the BB turbos.. right? I just want to get the correct oil feed setup so i dont burn this turbo out. I promise I have done so much research and everything is so back and forth. Thanks for any info!

 

[donniekak]

FP journal bearing turbos have to be fed unrestricted from the oil filter housing.

 

[JusMX141]

With this Old school red turbo, should I run a oil feed line with a restrictor from the OFH or the head?

You want as much oil volume as your turbo can possibly handle which is at about 50psi of oil pressure. If a restrictor is required to achieve this, don't use any more restriction than necessary to get the pressure to that level as over-restricting is going to cut the volume down as well.

Don't feed a FP Red from the head, and you MUST use a high-ZDDP racing oil as recommended by FP or the thrust hardware will fail.

talso, I read on the forums that the FP old school red has a built in restrictor, is two restrictors on the same line bad?

False- there is no restrictor anywhere in the turbo's oil supply. A MHI center housing has smaller oiling holes leading to the journals than a Garrett or Holset, but that has nothing to do with restricting oil flow to the turbo.

Maybe you're confusing the restrictor which is built into the factory 1G oil feed line from the head.

Also, this old school red is a JB turbo, so high pressure isnt as bad as the BB turbos.. right?

Depends on the brand. Mitsubishi turbos like no more than 50psi at the inlet, but as a rule of thumb you should never let the boost pressure level exceed the oil pressure entering the cartridge. If there's confusion, always test the pressure.