Gotpsi?

iTrader: (5)

So I'm about to plumb my HY35 holset for oil feed and am wondering if it should have a restrictor or not? I don't know what the oil presure of the dodge diesel trucks tipicaly is, if you have any insight please let me know thanks!

18psi

iTrader: (76)

If its journal bearing I don't think it needs a restrictor. I'm pretty sure its not ball bearing.

Gotpsi?

iTrader: (5)

No I dont think Holset makes a ball bearing turbo. I do think the Cummins has less than 60psi of oil pressure and that is what is making me wonder.

18psi

iTrader: (76)

If all else fails you can lurk on the Dodge sites and find out.

m2cupcar

iTrader: (5)

No restrictor for the holset (journal bearing).

Gotpsi?

iTrader: (5)

cool thanks guys I dont want to have any more problems, I already found that the turbine housing was cracked by the internal waste gate hole, but im welding that shut so I hope it wont be a problem.

18psi

iTrader: (76)

Every other Subaru STi turbo gets a crack like that past 40k miles jfyi. It is never a problem. Don't think you'll have any problems.

Make sure to weld it PROPERLY though. There's a process to welding cast steel like that. If you do it wrong it will hold for all of a few days.

Gotpsi?

iTrader: (5)

Ive weled cast before no problems. Hows the new motor running?

18psi

iTrader: (76)

So far so good
Exhaust leak is buggin the hell out of me but I'll get that sorted out soon

Gotpsi?

iTrader: (5)

Nice, get that fixed and we'll have to meet up some time.

Turbo_4

iTrader: (6)

If you don't want to put a restrictor in a journal bearing holset then why do we do it to our Garrett turbo's?

mazpr

iTrader: (1)

Assuming the turbo goes on a Miata engine, you MUST use a restrictor.

What dictates restrictor or not is what pressure is going to be feeded to it, not where it came from.

The Greddy kits have it included, like I learned the other day, so there is no need as it would be redundant.