Oil feed / return for 86-87

[White94camaro]

Hey, I have a 86-87 GN turbo that I'm putting on a Camaro. As for the oil feed / drain:

What thread size is the inlet?

Does the return line have to gravity drain, or can I run upwards into a valve cover or something. I don't want to drill the oil pan nor get a scavenge pump.

How are stock GNs setup for oil feed/return?

Thanks

 

[S10xGN]

Not sure about the feed line, I *think* it's 1/4" tube to a 1/4" NPT fitting... As you've surmised it's a gravity system and the drain point MUST be lower than the turbo outlet. Some people tap a fitting into the oil pan instead of drilling and tapping the block. The drain line appears to be 1/2 diameter or larger and attachs to the turbo with a small two-bolt flange.

 

[salvageV6]

Feed line is 1/8" NPT into the turbo, line itself is 1/4" tube flared into a right angle flare adapter to the NPT threads.

Gravity for the drain line as mentioned.

 

[White94camaro]

Thanks for the help guys! I'm just gonna have to drill my oil pan and hope I don't get any shavings in it...

 

[notabuick]

put plenty of grease on the tap and the drill bit to hold metal filings when you do oil pan..just did it to my mustang. from what i gathered on the turbo mustang sites you should use biggest drainback you can because you dont want a lot of oil or oil pressure hangin inside the turbo . i used 3/8 npt to 5/8 barbed fittings on oil pan. then i bought drainback flanges off e-bay that excepted 1/2 npt with a 5/8 barbed end. i used 3/16 brake line for feed..but dont go by me i havent run mine yet i used 5/8 drainback hose from a turbo website. when i punched the oil pan i did it like when you install a vortech. drill a 1/8 hole. then use a tapered punch and bang it through and try to roll the edges in so you have lots of material to tap.