oil restrictor on bb turbo feed?

[dnb]

what size oil lines do you guys run to your ball bearing turbo's?

the standard banjo bolts seem to have a small hole in them to restrict oil flow

[the_tonkau]

The restrictor is normal in a standard setup! The ceramic BB turbo's on the r33 rb25det should have this. I damaged an older style to4e bush bearing type turbo as I left the standard oil line on it after the turbo swap and it starved itself of oil and shagged itself. BB type turbo's need less oil than a bush bearing type. Apparently bush type turbo's need ALOT more oil flow. I got this info from Kyp at ATS in Melbourne, he is a guru and a nice bloke to boot!

[dnb]

thanks dude.

im fitting a gt35r.i dunno whether to restrict the line or not????????????

[raist60]

Change the fitting. I lost an exhaust side bearing in a gt30 using that banjo with pinhole in it.

I now have a GT35 on mine and i have used another banjo fitting which has a larger hole. Garrett turbos have restrictors in the chra.

[discopotato03]

Earls sell the correct fitting which from memory is 7/16 x 24 TPI inverted flare , but check with them . Its designed to be adapted to -4AN braided line fittings and not very expensive .

Cheers A .

[R31Nismoid]

You wont need a restrictor on a Garrett/HKS Ball Bearing turbo.

They have an internal restrictor of about .7mm on the actual bearing cartridge so there is no need. I've seen it while my turbo was apart

Just slap a line onto it and the turbo will do the rest.

[r33_racer]

I think most garret turbos have a mini ball in the oil feed housing which restricts the flow of the oil to whatever it needs so you dont need to restrict it in the lines. I know my 2530 is like that. You can check my looking in the oil inlet of the turbo and see if it goes straight to the inside of the main shaft or if theres mini ball bearing sitting in the hole.