Ryanbgb22

I bought a turbo oil kit that I have installed on my 76mm turbo (stock ls1). The flange that bolts onto the turbo for the oil supply (4an) is only sized with a tiny hole. The part description says something along the lines of 'reduced size to avoid over oiling'. How do I know if this is going to be enough oil, the hole is pretty tiny.

Ryanbgb22

Bump. Looking to get the car out on the street for a shake down today or tomorrow. Want to know if I'm getting the oil I need to the turbo.

Stroked96Bowtie

iTrader: (22)

I believe 3an and 4an are the common oil feed sizes. Ive got a 3an on mine. If there is oil leaking out of the turbo...its getting too much.

Ryanbgb22

Unrestricted 4an? I'm way under that for size with this restricter. I guess I will drill it out a bit. Thanks.

denmah

iTrader: (2)

buy a .080 or .060

you can get t4 oil feed flanges with a 4an fitting with it predrilled and restricted for like 5-11 dollars on ebay and amazon.

http://www.amazon.com/Turbo-Feed-Ada...2771995&sr=8-2

Toxic-Evo

iTrader: (2)

U can over oil a journal???? U sure it isn't a ball bearing??

Ryanbgb22

This is what I have now, just that the one I have the hole is concerningly small - I'm not sure what the size is - it might be in the .06 range already, is that enough?.

Atomic

iTrader: (37)

If your drain line is adequately large you shouldnt need a restrictor at all.

JoshuaGrooms83

iTrader: (2)

was wondering this for my t76 ON3. i have a 4an feed line to a 4an feed flange with a .080 restriction. and then a 10an drain. would this be ok?

PewterZCar

iTrader: (2)

I have the same turbo, with the same feed and drain. I run no restriction and have 0 problems.

LASTLS1

iTrader: (7)

I didn't run a restrictor with them.

JAX04

iTrader: (17)

Im confused what any of this oil restrictor talk is about with a journal bearing turbo?

As was said, if the drain is big enough, with the correct angle, etc. you should be fine.

ghost-1

iTrader: (4)

Like he said a journal bearing turbo does not require an oil restrictor. Make sure your oil drain is as straight as possible I run a -10 to the oil pain no restictor and have no issues on my 76.

427

iTrader: (3)

Some turbo's need restrictions or they can smoke at idle. You need to contact the people that produce the center of your turbo if it's a hybrid and they can give you the spec. My Garrett that has over 100,000 miles on it uses a .060 hole to maintain the oil pressure at the turbo of between 9-40 psi. Mine actually goes a touch over 40 psi at 5000rpm and up, but it does not smoke or have any problems. My engine without restriction would smoke at idle with a -4 feed, it was 60 psi at the turbo.

Kurt

ZL1Killa

iTrader: (17)

u don't need a restrictor unless you are above 80psi oil pressure wot. you can call garrett or turbonetics, many turbo vendors and I think the next size down on restrictor, I know it doesn't change a lot

Slowhawk

iTrader: (12)

All our turbo builds get restrictors. Had a few in the past smoke pretty good at idle or decel badly. We use .060 restrictors with no turbo problems. Our cars ussually have 40-50psi of oil pressure at hot idle.

Ferocity02

iTrader: (60)

The need for a restrictor seems to vary. Some are fine without one, some need one to prevent oil from getting past the seals. Go with what the manufacturer says. On3 told me to use a .0625" since my oil pressure is high, 80 psi by 4000 rpm.