turbo oil return line how big does it have to be for the turbo to discharge of oil

 

I use -10

 

i use -10 aswell, do some searching and u will find that some say -8 is sufficient

 

Use at least 10an. I would really look at what turbo your running. Garrett ball bearing turbos require a very small amount of oil so the return line is less likely to become a "restriction." The journal bearing turbos use a bit of oil so the line sizing then is crucial.

 

Depending on turbo size and type .5" to .625" -8 or -10

 

What about oil pressure to the Garrett turbo. Is stock oil pressure to the journal bearing turbos ok or do you need a restrictor. I hear you do need a restrictor for the ball bearing turbos.

 

thanks guys for the info