British American Transfer is ordering all the parts for my feed/return lines tomorrow. http://batinc.net/main.htm
You could probably drop my name and have them send you the same setup. Based on Sean and Dee's recomendations I went with a -4 feed and a -12 return.
FEED:
14mm -4an male/male reducer/converter
14in -4 an with female ends
-4 an male to 1/4in NPT male 90 deg elbow.

RETURN:
1/2in NPT to -12 male to male adaptor flange fitting.
12" -12 an high temp line

 

What about a -6 feed and -12 return? This is what I have. Are my seals at risk and should I switch to a -4 line? Is it possible to feed to much oil?

 

This just reaffirms why I'm not going with a restrictor. I was abit concerned with this potentially being a pain.

 

simply stated... yes

 

I ran a -4 from the block without restrictor with a -12 out and it was too much oil for my old turbo setup. I am confident that using the stock hard line on the oil supply would have restricted oil supply enough to have prevented failing the turbo's oil seals.

New setup has a 0.060" restrictor with the -4 supply and no problems with my Innovative dual ball bearing setup. Innovative recommended the restrictor size given the high FD oil pressure. Recall that our cars run significantly higher oil pressure than most so generic turbo manu recommendations may not apply.

If you run the stock hard line and then adapt to a short AN to get to the turbo you are probably ok without a restrictor no matter how big of an AN line you run.

YMMV

 

-4 to 1/8 NPT feed -

-10 return

 

-4 feed to a -4an -> 1/8 npt adapter, -10 return, no smoke. sleeve bearing gt40. no smoke with borg warner to4b either. a -10 return is fine especially if it never angles up or is excessively long

 

Gee......

Maybe thats why I'm smokey

-6 supply. Time to go change it So much for that fancy earls fitting!

 

Yeah that's my setup.

The 3an to 1/8 fitting/restrictor and 10 an return.

The 10 an return is the stock FC diameter.
4an is the stock inlet size.

So far I have not seen smoke due to it. I still have a rebuild with only 8 miles on the engine so I can't be sure if the turbo is still leaking or it's the rebuild.

 

I went to look for my stock oil line but somehow tossed the banjo fitting.

Therefore I think I need to come up with something else.

Funny how the -6 hose almost looks like the same diameter as the stock hose.

Why would I need a smaller line when I'm screwing into the turbo with a 1/8" earls fitting. Would that not surfice?

If not is there an adapter I can buy to put on this 1/8" to -6 earls fitting to restrict it?

Thanks,

This is probable cover somewhere but cannot seem to find it.

 

You can tap the id of the earl's fitting and screw in a threaded plug with a small hole drilled thru.

 

Cool. Never thought of that one.

 

quick question guys, other than excessive smoke, what problems or issues would there be with extra oil? maybe bearing damage? sorry for stupidity

 

Installed my oil restrictor. ARP turbo 1/8" to 1/8" .060.

Anyhow did not cure my smoking problem. Once tuned lets see if the smoking disappears

 

A restrictor can keep you from damaging your turbo - but once the seals are hurt a restrictor is not going to fix it.

 

i run a -6 feed to all my turbos,

if you read what is written in a post on the last page 95% of garrett turbos have restricters in the housings,

i would never run smaller than a -4 feed.

Dale

 

I'm running 3 but the restrictor pill is removed.

The rear seal is not a real "Seal".

It's more like a cover. not air tight so that's why the oil goes through the back first.

If there is enough pressure and time it will work it's way through the carbon seal on the compressor side.

 

I only drove the car 40km.... if that.

 

Anyway to tell for sure if a turbo has a restrictor in it?

 

Only way is to disassemble it.

It's inside and I saw it only because the turbo rebuilder had a spare cartridge laying around.