hi everyone,
Im in the middle of a build but not sure what -an i should go with 3,4,6,10 for return and drain lines. also what -an should i go for with fuel system. im looking for 500whp+ so i dont want any worries.

 

I run a -4 for the feed and a -12 for the drain, no problems and I got over 8000 miles on it now.

 

-4 feed (dont restrict until you start getting smoke. Or if you want to, use a .070-.100 restrictor for journal bearing turbos.

At least -10 return.

 

-6 here No restrictor for a non ball bearing( Ball bearings yes) I had 2 turbos burn down due to a "Big Name" shop( from the forums) telling me to run a restrictor. both turbos died from lack of lube. he was garaunteeing himself rebuilds IMO of course.

At least as said -10 return.

 

Too add to the OP's question,.. What about water lines for Garrett turbos? What size lines are people running? Do you even run the water lines or just the oil? I have seen and heard both. Curious to the general opinion.

Dave

 

regarding fuel, i have 6AN.

 

Curious as to how much miles were put on the turbos before they blew? Also, how did you confirm this?

I have had smoking problems with no restrictor. I put one in and I still have some smoke but no where near what it used to be.

 

The local turbo shop I now go to inspected it and asked what size line I used. I brought it in and showed them ..They just shook their heads. Also being a mechanic for 13 years I have seen a few bearing/bushing failures from lack of lube. The entire center cartridge bore was wasted both times from heat warpage and bushings being spun.

I would have to search thru old records for milage. Probably about 1 year daily driving on each. 1 turbo in Hawaii and 1 in NC.

 

The proper size for the feed line would be 3an for a ball bearing turbo and 4an for a journal bearing.

As for the return line, 10an will for the ball bearing turbos. The journal bearings should have a 12an. Good rule of thumb for return lines is that bigger is always better...

Restrictors can vary on the size of the turbos inner capacity to hold oil and the "port size" of the inlet and outlet. Typically you'll want a .030" for ball bearing and .060" - .125" for journal bearings. Another good idea is to pay attention to your oil pumps and oil modifications. Having a crushed or aftermarket oil pressure regulator increases oil pressure obviously so that should be taken into consideration...

 

? for you mono4lamar
i'm going to use a 62-1 turbo,fd oil regulator & t2 oil pump
should i use a restictor?
if so what size?

 

We run -4 feed -10 drain on all our setups. No issues. Garrett recommends no less than .5" for your drain. Garrett CHRA's are internally restricted but if it is still an issue we recommend .060 to .070. I wouldn't recommend restricting a non BB unit. I've seen more than one burn up.

~S~

 

BB CHRAs or all CHRAs?

 

You may loose a CHRA more easily with a restrictor because of contamination in the oil. I run a screen on the restrictor.

Barry

 

Oh and I use -4 in and -12 out. That is 1/4" and 3/4" for non-aircraft types. (put the 4 over 16 for sizing in inches).

Notice that you can modify a TII drain with its stainless bellows to work on a 3rd gen.

Barry


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What are you asking? If you mean restricted we don't run restrictors on journal bearing turbo's.


~S~

 

Im asking if all CHRAs are internally restricted? Or if its just ball bearing units?

 

Thanks guys! This was all very informative; however, I am running a GT35R an cant seem to find the right site that has everything needed. i need lines water and oil as well as all the fittings. also a complete fuel system.

thanks once again.

 

Contact ZERO R from 2 posts above yours. They should be able to help you out with everything for the 35r I would think.

I asked earlier but noone has responded to it yet,... What size water lines do you run..( Zero R)

 

Go to your local hardware/plumbing store and get a 1/16" fitting that threads into your CHRA. Make sure that the flare matches your oil feed line you're using... There will be a difference.

 

We do water and oil lines for all turbos in braid here at raceonly.

Pm me and ill sort it out.

But generally if its a BB turbo we run -4 feed with a .9mm restrictor. Has worked perfectly for every single car we have setup and cars have oil pressure varying from 60-115psi. And turbos have seen anything from 10-40psi.

Journal bearing turbos we run a unrestricted -6 line.

 

For the journal bearing turbos, what size return do you use? -6 feed is huge! No smoke? Wow.

 

For journal bearing -6 is no worries.

-10 return.