s15 turbo on a s13 sr

[conrad_s13.5]

I have a 180sx sr20, and getting a s15 turbo. Maybe im just over-thinking this, but would i need like a "oil restrictor" or something along those lines for the turbo?

im just thinkin' that with it being ball bearing it wouldnt need as much oil as the sr would be trying to push threw.

im sure someones done one on here,.. post up

[240ss]

my buddy just did this. he hasn't had any problems. you should be good to go

[carnagexxxx]

What other mods do you have? List everything that you've done so far. It's not a great idea to say"let's just slap a turbo on". There are different "S15 turbos" also.

I'd warn you now that posts like this make you cannon fodder for people here. Prepare to get a few people telling you to search.

If I were you, try to do some research and post what plan of attack you are approaching. People will be able to help you better when more information.

[YoungGun]

You should get an oil restrictor so you don't mess up the turbo.

Stainless turbo lines usually come with them.

[jspaeth]

You should get an oil restrictor so you don't mess up the turbo.

Stainless turbo lines usually come with them.


Agreed. Just order some Earl's turbo lines and an oil restrictor.

I forget what size...do some searching.

[conrad_s13.5]

ive done some researching, and the people i saw that did run a t28 havent put any restrictor on,.. and said theyve had no problems, so it just kinda stumps me. I dont have alot of free time, so i cant sit on teh interwebs and do as much research as i need to tho... so ,. sry bout that guys...lol



im just stock now, with FMIC, but i got a winter build going, and will be installing:
-t28
-fuel rail
-nismo 550cc injectors
-aeromotive FPR
-Q45 maf
-cometic headgasket
- maybe solid lifters

,... and thats about it engine wise,.. thanks for the help guys

[Moon Ill]

Found this by searching and am not creating a new thread.


Does the S15 Ball Bearing Turbo require and oil restrictor?

From searching I've determined yes it does. It requires a restrictor with hole size ~.03"

My tuner is telling me the turbo has a built in restrictor. Is this true?

Question 1: Does the S15 turbo require an oil restrictor?

Question 2: Does the S15 turbo have a built in oil restrictor in the CHRA?

[Z33dori]

yes if your moving up from a T25... they you will need to add and oil resistor .... no it is not built into the turbo ....

[Moon Ill]

yes if your moving up from a T25... they you will need to add and oil resistor .... no it is not built into the turbo ....

I honestly do appreciate you for clearing that up for me.

[fliprayzin240sx]

Restrictor on S15 turbos are built into the lines.

[jackal264]

Restrictor on S15 turbos are built into the lines.

actually not exactly. for s14's and 15's the restrictor is on the bolt of the banjo fitting on the feed line that threads into the motor. and just to confirm what was said above. all gt ball bearing turbos use a .03 restrictor. ball bearing turbos need VERY little oil to lubricate as the cooling is done by the water lines so pumping to much oil into the turbo will only cause unwanted pressure and could blow the seals.

[Flybert]

I've always used the s13 t25 stock oil line on my t28 with no problem.

[Moon Ill]

I called JGY and they said the .044 was what Garrett sent them for all the ball bearing turbos they sell.

But even Garrtts own site says a MINIMUM of .040"

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. source: TurboByGarrett.com - FAQ's (http://www.turbobygarrett.com/turbobygarrett/tech_center/faqs.html#t16)

[jackal264]

I've always used the s13 t25 stock oil line on my t28 with no problem.


cool story bro, to bad your doing it wrong.

[afmafias14]

ya installing a s15 turbo i beleave when i did it many years ago i needed to reclock the elbow and i bought new lines. you can bend the s13 lines but its not a good way off doing it

[conrad_s13.5]

i bought a gt2871r the restrictor fitting came on the turbo when i got it, i figured it'd need to be on the block to the line but figured that'd work too.

...and everything needed to be reclocked just to save you time from taking the whole manifold and turbo off and apart 3 times,....lol

just make sure the oil dump is on the bottom, cuz when i just clocked the compressor side the dump was facing the block.

just some shit i ran into,. hope it helps