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Hey guys ive been getting mixed answers from alot of people can someone help

i have a rb30det and a brand new garrett gt3540 now for the oil feed fitting should i run a restrictor style fitting or just a normal type ive spoken to mtq he said you can run either depending on oil pressure and my good mate STAO from hypergear said i should use a normal fitting and the restricted one will cause my turbo to die

can someone please let me know im goin crazy i have a -4an braided oil feed line

both are inverted flare type ONE WITH THE restriction is a banjo type and the non restriction is a normal turbo to -4an please help guys cheers

as for oil pressure i have no idea as the motor is not it yet and only have a rb25det oil pump

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yeah they do as most garretts do but ive been advised from ATP in usa to use a ristrictor and mtq but then i have stao tellin me it will blow the turbo saying that i had a gt3071 on my rb25 with a normal fitting and front and rear seals went on that so i dont really want to risk a $1500 brand new turbo

has anyone here had experience with out with the restriction fitting

im really looking for results on the gt35 on either a rb25 or rb30det i know the fords are prone from factory to blow the seals for this reason i just want to make sure it will be fine with a restrictor as for warranty purposes

I've been running my GT35 on a RB25 with no oil restrictor, for ~3years now with out any problems.

I asked around about this as well and was told not to use a restrictor in the oil line as it is built into the turbo.

ok cool so i just got a email back from garrett and they said it all depends on the ammount of oil pressure your engine has and to make sure you dont get more then 55-60psi goin into the turbo and that a inline restrictor cant hurt

Of course they wont be replacing the turbo under warranty anyway. Too small a restrictor will definitely cause issues and I have seen too many GT35 turbine wheels shear the shaft at the rear bearing to not run a good supply of oil to it. Just my opinion though.

ATPUSA said if i follow his recommendations of using a restrictor it will be covered under warranty as even gt35 they fit the restrict the oil im just goin crazy here cause the last few garrett BBs turbos have died do to a normal fitting as do most fords with the same fitting so im not to sure what to do here its on a rb30det yet to be fitted back into the car so i cant excatly test how much oil pressure it has

this is what they said

Jayson, have a look on the turbobygarrett.comweb site (select Turbo Tech, then Basic, then Oil and Water Plumbing) it shows the max oil pressure for a Garrett Ball Bearing is 60psi, more than 60 psi may result in oil leak issues

I would go -12 tbh, but if you already have all the -10 stuff give it a go

i had big issues with my GT35 and a 5/8" (-10) oil return and they were resolved by making the drain 3/4" (-12)

also my oil feed to the turbo has a 1mm restrictor in it just before the turbo, has had it for over a year now without any issues.

ok cool as titan so i should get a 1mm fitting thats wat ive been told

what issues did u have with the 5/8 oil drain?? the braided line i have it about 60cm long but iknow its the thickness that i need to get right

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