Vagitarian

Hey guys, I need to buy a new oil line for my turbo. This kit seems to come with everything, and is the exact style I want.

http://www.ebay.com/itm/261133770908...84.m1439.l2649



It has an oil restrictor of .08" on the inlet

Would that be ideal for a journal bearing garrett t3 turbo??

My current turbo is a genuine garrett, but my next turbo, admitedly will probably be a cheap ebay chinacharger at first just to hand some fun changing sizes for cheap.

Would the 2mm also be ideal then? They do also sell a 1mm version but that seems to small

wantboost

iTrader: (2)

The usual rule is bigger restrictor for journal, smaller for ball bearimf

riceball777

The correct size oil restrictive for Garrett turbos are .06 for non ball bearing and .035 for ball bearing turbos.

wantboost

iTrader: (2)

It also depends upon your ,maximum oil pressure

blackeg

i think ive got a .065 on my journal bearing. i still get some oil but my pressure can get pretty high over 80 on cold start and in the 90's by the time i hit the limiter

KevinEF7

I dont think .08" would be a problem on a journal bearing though, most people dont even run restrictors on USA built turbos, its the chinachargers that you usually blow passed the seals with

Id run the .08

wantboost

iTrader: (2)

Almost everyone runs restrictors on journal and bb Garretts and precisions... its a necessity

vwbased

have a nice day

wantboost

iTrader: (2)

Restrictor usage has nothing to do with crankcase pressure... it has to do with oil supply pressure... ball bearing Garretts require very little flow and pressure given their design, too ,much pressure and flow destroys the seals.

Journal bearing turbos require more pressure than BB ones but not as much as our motors produce but they still need flow, hence the use of a larger restrictor than a BB turbo uses

kbouchard1092

I think his logic is that with high crankcase pressure; you will have less oil return to the crankcase since there would be pressure on the drain side of the line. So regardless of restrictor size if you have crankcase pressure its not going to drain correctly. Seems pretty logical to me

You're right, Restrictor usage has nothing to do with crankcase pressure. I just dont think that's what he meant tho

"Also, starving the bearings of oil limits their load handling and vibration damping capacity" This again seems logical but is a little beyond my skills sets; im no Turbo engineer. I personally dont use a restrictor on my JB Garrett

wantboost

iTrader: (2)

If your crankcase pressure is that high you have serious problems

And some people don't need a restrictor, it depends on maximum operating temp oil pressure, if it falls within Garrett's spec you don't need a restrictor... and turbos like holsets or MHI turbos don't need them in the first place