At work we do tons of -8 stuff on our hydraulic systems. I have always used -10 for all my turbo cars.

Would it be a problem to go to this size? This is one of the last things I need to figure out on my car.

Its a 1/2" line.

 

I've been using a -8 return line to the girdle on my JB turbo's for 7 years with not one problem and I also use a -3 feed from the relocation block with no restrictor. -8 lines are also used on my relocation kit for 7 years with no problems.

 

-8, I had something bigger, I think -10 and may have been the result of my oil pressure dropping and causing a rod to spin years ago.

Been -8 since 05 and have not had oil pressure problems since.

 

Alright perfect thanks guys, I have a hydraulic crimper and will make up my own lines then save a little money.

 

you cant go too big on the return. it doesnt effect your pressure unless its too small on journal bearing cartridges.

 

Bigger the better on the return.

I use -10 stuff myself.

 

-10AN here on all of my returns. -3 on all inlets

 

^im with siadam and berlina

im running a 5/8"ID return line with -3 in.

 

5/8" Minimum is what I would do. 3/4" is even better on journal bearing turbos.