Gt2860r-5

[gun32gtr]

ive heard from a few people that ball bearing turbos only need half the oil supply of the plain bearing turbos.

so what i need to no asap is that do the 2860r turbos come with restrictor in the oil line already?as i already sold me stock turbos and cant check if they where the same as this pic. this is the oil line hole on the 2860r!!!

and one put these in would be good to hear from yous!

cheers kane

[The Mafia]

if its a genuine garrett cartridge then it will have an oil restrictor built in.

[gun32gtr]

thats good to no.yes it is genuine garrett pair of gt2860r-5. thanks mafia

[BOOSTD]

I had to remove a coupler from the oil inlet on my hks turbos to fit the garretts up, not sure if this is the norm...

[gun32gtr]

so they dont come with restrictors then?

[dontfeelcold]

Have you tried emailing Garrett?

[Slide]

There is already a restrictor in the main oil feeding banjo bolt in the block.

The oil is seperated into the master line from this bolt and runs to both turbo's.

[gun32gtr]

^^^^^^^^thanks slide that answer myu question perfect.

[Cubes]

According to Garrett.......

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.

[gun32gtr]

so from that id say ill be fine with what i got?

[Slide]

Yes