Ball Bearing Turbo Oil Feed Pressure

[CTX-SLPR]

Howdy,

Should a Ball Bearing center section be fed full engine oil pressure or does it need a restrictor or regulator to keep from pushing oil past the seals?

Thanks,

 

[suicide six]

Id say no restrictor,some have used prefilters for these turbos with no life extendency.

 

[petesgn]

On my Dbb turbo garrett told me to run a restrictor


http://www.atpturbo.com/Merchant2/m...OD&Product_Code=ATP-OIL-021&Category_Code=OIL


Oil Restrictors for DBB(35R, 40R, 42R), What Garrett says...

Here is what Brian Reigner of Garrett, and two other reps said,

1- are the GT turbos internally restricted? answer; YES
2- Do DBB GTR turbos require an oil restrictor? answer; if the oil pressure at the inlet is over 40psi, then YES.
3- how do you recomend restricting the pressure? answer; You can use the .035 restrictor from ATP or make your own, so long as pressure at idle does not fall below 15psi at the inlet.
4- what is the recomended range in psi for the GT turbos while boosting? answer; 30-40 psi, NO MORE, or you will get oil blowing by the piston ring (for lack of a better term) seal, and YOU WILL LIKELY HAVE PREMATURE FAILURE OF THE CHRA.
5- So, if users have oil blow by, could that be considered normal, or is that ALWAY indicative of a problem? answer; IT is a problem, and must be addressed for max life of the CHRA.
6- If a CHRA fails, do you have to replace the entire cartridge? answer; Yes, but Garrett is working on an exchange/rebuild program for the BB turbos, that should be available in the near future.

 

[salvageV6]

I think my dual BB Innovative has a built in restrictor unless it's the seal itself.

Oil pressure gauge is plumbed into the top of the turbo feed line, pressures increased by about 15-20 psi. after installation of it.

Hottest idle pressure will get down to 20psi. however.

I use a filter on the feed line -6AN adapted to the stock line.

I did ask Rick at Innovative what I should do to prolong the life of this turbo and he said run the synthetic oil and no BOV.

I guess I should ask him about restrictors with their turbos.

Maybe folks with the X-trims know?

 

[CTX-SLPR]

Why would a BOV reduce turbo life? From my understanding it would appear that it would increase it by reducing compressor surge due to pressure feeding back across the compressor wheel.

 

[salvageV6]

He simply stated I wouldn't need one to prolong the life of their turbo.

He never stated or implied it would shorten the life of the turbo.

I didn't use one on his recommendation, I did switch to synthetic oil however and put on the filter.

Sorry if there was any confusion on that.

 

[salvageV6]

As of sometime in 2003 the Innovative double BB turbo housing is internally restricted.

 

[Scott Atk]

Hey Salvage, Are you saying by restricting the turbo oil feed line you increased your overall engine oil pressure??

 

[salvageV6]

I wish I could say that Scott.

I plumb my cars oil pressure gauges up at the top of the turbo in the feed line, where it is easy for me to work, and I use copper line for a few feet then couple it to the stock supplied nylon stuff for the gauge in the car.

Anyways up top in that location on a normal type turbo the oil pressure is a couple of psi. low, usually, compared to the reading most people who plumb their gauges in at down at the brass block get for numbers.

However when you put on the BB restricted oil fed turbo or any other restriction in the turbo feed line the gauge reading in that line goes way up.

I haven't relocated the oil pressure gauge to anywhere else in the motor to check pressures elsewhere.

Nor would I have a decent baseline to check with anyways.

I highly doubt it helps anywhere else in the motor.

Didn't mean to confuse anyone... again.