Akalima

Hey i just recently heard that u r supposed to have an inline filter or restrictor of some kind to bring down the oil pressure to ur turbo to 40 psi and no more. I wanted to ask Honda guys to make sure. And if so what is the best way to measure the pressure to that line and what is the best way to restrict the pressure.
I am running a gt28/40R turbo and my oil pressure off my engine is 50-75 psi.

Akalima

Bump

DrivinVtec

threw a air gauge or oil gauge between feed line an the turbo.

Akalima

yeah ill try that but just wondering if i have to bring down the pressure and the best way?

numbnuts22715

well, if the pressure is too high, of coruse you need to bring the pressure down.

The best way to do so is with an oil restrictor.

Akalima

k and where would i get one? Any parts store?

numbnuts22715

you may have to order it from the internet. I know some of the turbo shops sell them..
If you have at uner shop in your area, try there.

esedulerp5tenin

http://www.atpturbo.com/Mercha...e=OIL

thelate1

i believe this also depends on the turbo you are using. if it's a garrett, search their site. garrett non bb turbo's= usually don't need a restrictor
garrett bb turbo's= usually do need a restrictor. this is per garrett's website. i think i got that right.....if it's not a garrett, then sorry.....

Akalima

awesome thanks boys

Boostfed

I must be dislexic today


Modified by Boostfed.com at 9:28 PM 6/27/2007

thelate1

this taken directlly from garretts site:

Does my turbo require an oil restrictor?
Oil requirements depend on the turbo's bearing system type. Garrett has two types of bearing systems; traditional journal bearing; and ball bearing.

The journal bearing system in a turbo functions very similarly to the rod or crank bearings in an engine. These bearings require enough oil pressure to keep the components separated by a hydrodynamic film. If the oil pressure is too low, the metal components will come in contact causing premature wear and ultimately failure. If the oil pressure is too high, leakage may occur from the turbocharger seals. With that as background, an oil restrictor is generally not needed for a journal-bearing turbocharger except for those applications with oil-pressure-induced seal leakage. Remember to address all other potential causes of leakage first (e.g., inadequate/improper oil drain out of the turbocharger, excessive crankcase pressure, turbocharger past its useful service life, etc.) and use a restrictor as a last resort. Garrett distributors can tell you the recommended range of acceptable oil pressures for your particular turbo. Restrictor size will always depend on how much oil pressure your engine is generating-there is no single restrictor size suited for all engines.

Ball-bearing turbochargers can benefit from the addition of an oil restrictor, as most engines deliver more pressure than a ball bearing turbo requires. The benefit is seen in improved boost response due to less windage of oil in the bearing. In addition, lower oil flow further reduces the risk of oil leakage compared to journal-bearing turbochargers. Oil pressure entering a ball-bearing turbocharger needs to be between 40 psi and 45 psi at the maximum engine operating speed. For many common passenger vehicle engines, this generally translates into a restrictor with a minimum of 0.040" diameter orifice upstream of the oil inlet on the turbocharger center section. Again, it is imperative that the restrictor be sized according to the oil pressure characteristics of the engine to which the turbo is attached. Always verify that the appropriate oil pressure is reaching the turbo.

The use of an oil restrictor can (but not always) help ensure that you have the proper oil flow/pressure entering the turbocharger, as well as extract the maximum performance.

that's what i said, isn't it?. i talked to atp turbo and ordered a restictor for my t3 anyways, just to be safe.

Akalima

awesome info

numbnuts22715

also, I dunno if you';ve gotten a restrictor or not, but a lot of people use .035" restrictors.