I am currently running a -12 return line, but would like to use some an fittings on it after my build is complete. however the -12 adapter fittings are to big to fit between the compressor and turbine housings. so i was thinking of switching the oil return to -10. but i am worried about the oil not being able to drain fast enough by making the switch.

the turbo is a garrett t04h with a 60-1 compressor & .84 divided hot side. i am running -4 feedline with a restrictor aswell.

 

Do not worry as long as the return is not smaller than the fitting on the front cover you will be fine. It is important to remember that fluid lines are only as big as the smallest opening. If it helps, I ended up making my return from aluminum tubing. I made the flanges myself b/c I got tired of leaks.

 

thats sweet, i have -10 on my setup and it works flawlessly

 

I've used -10 with success.

 

thx for the replies guys, keep em coming

 

-10 works just fine

FWIW, I've found the fabric braided hose works well for drain lines as it seems to be less prone to kinking than stainless braided.

 

Yup I'm running a 1/2" (roughly equivalent) hi-temp silicone drain. Works fine. Used it on several turbo's I've ran (to4-S, to4-R, GT3574...)

 

1/2" is not -10 an, its -8 an

 

lol my bad, hadn't had my coffee - its 5/8"

http://www.atpturbo.com/Merchant2/me..._Code=ATP-OIL1

 

I'm using 10an on my 42r setup. It's plenty...

 

no coffee joe?, or sniffing to many fumes again, that ppg primer is a good buzz. thx for the info

 

well that seals the deal for me then, i am off to the garage to make a return line.
Thx guys

 

Aren't silicone and oil incompatible?

 

Beats me, but its been on the car for over 30,000kms and went from Canada to the dragon to florida and back this spring.

Still feels like new.

 

If your silicone hose is like mine, the oil will weaken it, and it will be more likely to fail. I used silicone to run from my oil fill tube to my breather bottle, and it cracked after about a year. Since the drain sees very little pressure, it may take a long time to fail. Keep us posted.

 

Will do, but FWIW, the hose is sold as oil drain hose for a turbo. Is effing hearty stuff. EDIT: also, the +30,000kms were over the span of 3 years, but 90% of the mileage was in the last year.

 

That's nice to hear I helped. Most of the time people don't listen to me I have no idea why. Anyway, even though you're using a braided return line I recommend that you uses some sort of material to reflect the heat. It would be really smart to use a "pyro shield" (what I use) to keep heat and flames at rest. No reason to send more heat into the oil and even more back into the motor...

 

im using -10 on my BNR stage 2