Gt3076r, Oil Restrictor? Feed Line Size? Acceptable W/g Mm ?

[Koshi]

Iam going GT30 really soon and i was wondering about a few things. Iam running a pretty heavy weight oil right now Greddy GR-1 10w-60, i get awesome oil pressure all day long (7.5 kpa revving high) and i was wondering if i should run a restrictor on the GT30 to prevent seals from getting blown.

Those of you who already run the turbo, what size oil lines did you run to the turbo? I was also planning on running a Tial 38mm external wastegate with VTA, will this suffice for my final goal of 15 psi?

Thanks

[tridentt150v]

You sure its kpa? 7.5 kpa is 7.6 kg/cm2 and thats way too much pressure. Usual pressure for a road car is 3.5 to 4.0 kg/cm2. Even revving you shouldn't see 7.5 once the oil warms up, 5 maybe.

If you have a look at the bolt that clamps the banjo fitting to the block on the feed side, you will probably find that there is a restrictor in it already anyway.

There is a wastegate sizing help thread in the DIY section, a 38-42 sounds about right to me [i'm running the same turbo and using a 40mm at 16 psi, and I used the DIY thread and thats basically what it told me to use].

[Koshi]

well i guess its on the 7.0ish kg/cm2 on the stock oil pressure gauge... 2 needles about the 2nd tick from the top on stock gauges. I idle about half way down to the next tick from 5 kg/cm2, at full temp.

[tridentt150v]

At say 3-4000 rpm cruising you should see 3.5-4.0 kg/cm2, thats normal or both my std gauge and greddy gauge and/or oil pump are stuffed and I know thats not true. If your going off the std gauge then it could be out........try installing an aftermarket gauge and see what it reads. I use 5w 50 synthetic, so it shouldn't read any different to your 10w 60 when its warm, maybe a small diff, but not enough to worry. Not saying your oil pressure is bad, but I wouldn't want it.