Oil Supply To B/b Turbos

[tacker]

Guys,

do i need to restrict oil supply to ball bearing turbos or just connect up the old supply system.

regards

PS i did hit the search button.

[dangerman4]

Guys,

do i need to restrict oil supply to ball bearing turbos or just connect up the old supply system.

regards

PS i did hit the search button.

yes it must be restricted.

ring gcg and they will post you out a restrictor to suit your oil feed -4 etc..

[tacker]

cheers dangerman.

i have been doing the search thing again and found a link where they say the garrets have a restricter built in quite a few guys on here commented in that link that garret do have this restricter in place.

So you were perfectly correct

[Ryanrb25]

is this for all turbo upgrades or from non bb to bb? say for an r33 to gt3040? ball bearing to ball bearing..i assume this is ok.

[dangerman4]

is this for all turbo upgrades or from non bb to bb? say for an r33 to gt3040? ball bearing to ball bearing..i assume this is ok.

if you change your oil feed line then you need a new restrictor.

all garret BB turbos need less then 50psi (i think thats right) so when your engines cold or the oil pressure is high you need to slow down the flow with a small restrictor that slides inside your oil supply line where it bolts onto the block.

Its a 2 minute install.

[markimak]

if u dont u get oil in ur intake and out ur exhaust.. oil in intake.. detonation

[tridentt150v]

But you only need this if you have - at some stage - taken it out. R33 Gtst's all come restricted from the factory, they are already running with a BB turbo.

Well thats my spin on it anyway.

[Ryanrb25]

ok so let me get this right, im buying a GCG either 3040 or 3540, doesnt matter anyway, i wont use the standard oil lines so ill get braided with fittings etc...does this mean ill need a new restrictor that goes inline or is it in the block already because its already got a BB?

what happens if you dont have a restrictor and it runs more than 50 psi?

[dangerman4]

ok so let me get this right, im buying a GCG either 3040 or 3540, doesnt matter anyway, i wont use the standard oil lines so ill get braided with fittings etc...does this mean ill need a new restrictor that goes inline or is it in the block already because its already got a BB?

what happens if you dont have a restrictor and it runs more than 50 psi?

yes you will need a restrictor

the standard turbo runs standard lines which have a restrictor built into them.

once you remove the turbo and the standard oil supply line you have no restrictor and will therefore get full oil pressure thru the turbo. bad

so get a restrictor from gcg etc and it will keep your turbo happy.

ps new garret turbos are NOT covered by waranty unless you have a restrictor.

[R31Nismoid]

It depends what turbo far as i know.

Most BB Garretts that ive seen have an internal restrictor on the cartridge itself, meaning you dont need an inline one

I never ran one with my GT30 and it was fine.

There was no requirement/advice from Garrett to say that i required one.

The turbo did die once due to lack of oil, but that was another problem unrelated with high/too much pressure, and while it was apart you could see the restrictor clearly.