Oil drain tube sizes..what r u using?
 

Just wondering what size lines you guys are using for your oil drain lines. I assume nothing is too big, just overkill, but what size is too small? My oil feed line to my SR20 turbo is -4 and I am using a 1/8" I think pop rivet for my restrictor, so what size I.D. drain hose should I be using?

5/8" should be sufficient.

Agree, I'd run -10 or -12

I'm using a -4 feed line with no restrictor and a -10 drain line. Now I less than 10 miles on my new set up so I'll let you know how it turns out, but with the -4 feel line and no restrictor the turbo see a max of 30psi of oil.

Is this at idle?


With no restrictor and a -4an line I don't see how it wouldn't see over +90psi of oil pressure when you near 7000RPM.

I personally have to run a .040" restrictor with my -4an line; even a .065" orifice is too large.

-4 feed. 5/8 drain, no restrictor.

T25G? that a Ball Bearing turbo? Those tend to have a built in .035" restrictor.

-3AN feed, -10AN drain hose

Journal bearing off an SR20.

I'm using some of that water pump tubing that runs to the heater core (5/8" I think). Here's some oil flow using a -3 feed line (no restrictor) t3 center and a shimmed oil pump at ~1000 rpm idle. I've run about 500 miles since the install and haven't had any issues w/o a restrictor. YMMV

On a T25 turbo a -8, -10, or 5/8" is sufficient.
Stephanie

I've been looking for this video forever.

Anyway, -8 = 3/8", right?

-8 ~ 1/2"

just a minute....

Nominally, the AN sizes go in increments of 1/16". So -8AN should, in theory, be 1/2" ID.

That said, these is tremendous variance in actual sizing from one hose to the next, which is one reason why, when assembling AN lines, you have to be sure that the hose ends you have selected are rated as being compatible with the particular hose you are using. (variances in OD, even for a common ID, are another)

As an example, Earl's Auto-Flex has an actual ID of .438, whereas Earl's SuperStock had an ID of .5, and Earl's Speed-Flex has an ID of .563.


That said, +1 on -10. (that's looks weird to write)

-4 supply no restrictor, -12 drain . that's on a big 16g. went for the way overkill setup. no issues and it looks bitchen'.

Hot idle is right around 7psi if I recall correctly I'll take an other look at it. I'm using a GM brake banjo bolt (found in the "help" section of most parts stores), with a banjo to -4 adapter, and -4 into the turbo and oil psi gauge.

So my feed line is a -4 and I am running a 1/8" pop rivet for restrictor. My drain line is 3/8". My question is, will this drain line in time be insufficient and cause my seals in the turbo to blow and leak oil?

So if 3/8 :ne: -8, am I looking at this chart wrong?

Attachment 210510
http://www.anplumbing.com/thread_npt.html

NPT 3/8 closest AN Ftg. Size is 8?

http://en.wikipedia.org/wiki/AN_thread

The AN size is based on OD, apparently.

^Curious about this too, since this is the tap size (3/8) that BEGI sends.

3/8 NPT then is -6. Does that seem a bit small?

However, the tap is ID and it seems AN is measured OD.

I hate this.

*Edit* I reread the link I gave to anplumbing. 3/8 ID is ~ -8 in flow.

Came to this thread to lambast the OP about his poor grammar in the title. You aren't posting this from your damn cell phone. You have a full keyboard, so use it, you lazy shit.

I use a -3AN feed line with an .035 restrictor and a 5/8" return. On my old journal T25 .48/.49, I ran the same -3AN line with no restrictor.

So by proper grammar, you mean a fine example like this...
"Word to your mother" instead of "Wurd 2 ur mother"
Anyway, what I am getting out of this is that my 3/8" ID hose is the same ID as a -8AN? I have a piece of -6AN laying around, which I measured, and it is 1/4" I.D., so this holds true. So my -4AN oil feed line should be 1/8" I.D. and with my 1/8" O.D. pop rivet restrictor stuck in there, this should mean that my 3/8" I.D. hose should be sufficient in draining my CHRA. The other day I was under my friend's Eclipse GSX looking at stuff, I noticed his drain line (which is stock) appeared to be the same size as mine. His car has "the big 16G" which should require the same oiliing as a SR-20, correct me if I'm wrong.

So by proper grammar, you mean a fine example like this...
"Word to your mother" instead of "Wurd 2 ur mother"
Anyway, what I am getting out of this is that my 3/8" ID hose is the same ID as a -8AN? I have a piece of -6AN laying around, which I measured, and it is 1/4" I.D., so this holds true. So my -4AN oil feed line should be 1/8" I.D. and with my 1/8" O.D. pop rivet restrictor stuck in there, this should mean that my 3/8" I.D. hose should be sufficient in draining my CHRA. The other day I was under my friend's Eclipse GSX looking at stuff, I noticed his drain line (which is stock) appeared to be the same size as mine. His car has "the big 16G" which should require the same oiliing as a SR-20, correct me if I'm wrong.

If 3/8 is good enough for BEGI, it's good enough for me. Only difference is that we are using journal bearing and BEGI uses ball bearing turbos. Not sure if that makes a difference in oil draining though.

i'm using 8an, no problems. has anyone seem failure from too small of a hose?

One quick question, and its probably a stupid one. Do you guys know when on Begi's website they say line is measured from fitting to fitting, do they include the fittings with the lines?

Mine is 19mm.

just because I cant find out the sizes, what are the water fitting sizes for garrett t25s?

-4 feed, -10 drain, no constrictor.... T3 journal bearing center section. no problem for a tad under 10K miles.

Perfect thread for my current problem.

New engine same turbo and lines, turbo is over oiled like crazy! -3an feed no restrictor and -10an drain on a gt2871. Old stock engine absolutely no issues with over oiling, new built bpt goes in and turbo is caked in oil wtf? 3estrictor on a -3an line?Never heard of that but I guess that's what I need.

im running a 5/8 line with a 3/8 nipple into the sump

If you look on ATP turbo parts if you are buying the feed connection for a T25 journal its straight through , if you buy the connector for a GT25 i.e ball bearing turbo it has a restriction in. Think this is the same for all Garett journal / ball bearing.