Thinking: Single Turbo Oil Drainage

atihun · 03-01-05, 01:33 PM

So I was thinking, "why not use both oil drains on the engine" for the single turbo, as used with the stock twins.

Just put a Y from the turbo out to a line for each of the iron plates.

Wouldn't this help with drainage and therefore less blowby (with properly installed catch can)?

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rotoboy661 · 03-01-05, 01:56 PM

HUH?? WHY

if u are worried about oil blow by just use a oil restirctor

theres no need for 2 man, u just making more work for urself

or if u really want to just use a -10 an fitting and -10 ss line like i did

atihun · 03-01-05, 02:10 PM

One because it is not recommended to use an oil restrictor on the turbo I am going to use (GT35R).

Two, it's an extra ss line that takes 10 minutes to put together.

Three, you have more flow out capacity.

I don't know for sure, that is WHY I was asking.

Quote:

Originally Posted by rotoboy661

HUH?? WHY

if u are worried about oil blow by just use a oil restirctor

theres no need for 2 man, u just making more work for urself

or if u really want to just use a -10 an fitting and -10 ss line like i did

boostgasm · 03-01-05, 02:50 PM

Quote:

Originally Posted by atihun

One because it is not recommended to use an oil restrictor on the turbo I am going to use (GT35R).

Two, it's an extra ss line that takes 10 minutes to put together.

Three, you have more flow out capacity.

I don't know for sure, that is WHY I was asking.

GT35R has built in oil restrictor, one return is sufficient

power hungry · 03-01-05, 04:32 PM

My 2 cents is I would think the Y would be more restriction than a single -10 line.

mark57 · 03-08-05, 09:30 PM

The I.D. of the factory oil return line is 5/8". You have to use -12 line and fittings to maintain the 5/8" I.D. of the -12 fittings.

jdhuegel1 · 03-08-05, 11:44 PM

Quote:

Originally Posted by mark57

The I.D. of the factory oil return line is 5/8". You have to use -12 line and fittings to maintain the 5/8" I.D. of the -12 fittings.

Yup! Good point.

NewbernD · 03-09-05, 10:08 AM

Quote:

Originally Posted by mark57

The I.D. of the factory oil return line is 5/8". You have to use -12 line and fittings to maintain the 5/8" I.D. of the -12 fittings.

Just splitting hairs, but -10 has a ID of 5/8". -12 is 3/4" (12/16)

jdhuegel1 · 03-09-05, 10:49 AM

Boy is my math off.. Oh well! I run -12 because it slipped over the stock return with the end flange cut-off.. I just figured it sounded right! Thanks for the clarification.

atihun · 03-09-05, 02:16 PM

Quote:

Originally Posted by power hungry

My 2 cents is I would think the Y would be more restriction than a single -10 line.

???

How would running a (1) -10 line from the bottom of a turbo to a -10 Y to split into (2) -10 lines be more restrictive? Using a correct type of Y connector such as:

I already have one of these for the fuel lines, and there is no way this is restrictive.

dubulup · 03-09-05, 02:19 PM

how do you plan to route a drain to the rear drain?? my manifold is definitely in the way...

jreynish · 03-09-05, 02:28 PM

One oil drain line of -10 AN but -12 is preferable, would be more than sufficient.

c00lduke · 03-09-05, 04:02 PM

I was thinking of doing this but my manifold would be in the way also and would worried about the path not being at enough of a decline. My -12 seems to be doing the job.

dubulup · 03-09-05, 04:37 PM

Quote:

Originally Posted by c00lduke

My -12 seems to be doing the job.

agreed.

highspeed101 · 03-10-05, 05:25 AM

I've seen that -10/-12 arguement on here quite a few times...i want to clear it up. The -10 lines DO NOT fit over the stock oil return line. I bought both and just sold the -10 on ebay. It didn't fit...no way no how, not if you bench 500 lbs and force that sucker. Its a -12.

mark57 · 03-10-05, 08:08 AM

Quote:

Originally Posted by NewbernD

Just splitting hairs, but -10 has a ID of 5/8". -12 is 3/4" (12/16)

The I.D. of -12 line is greater than 5/8", but the I.D. of -12 fittings is 5/8". -AN sizing refers to the O.D. in 1/16" increments.

I've posted photos of the -AN fittings and line I used to fab up lines for my car and several others. Remember, the turbo drain line is gravity return and must be w/o kinks, loops, fitting restrictions, etc. that would inhibit gravity flow. I use -3 for oil feed line. And, as someone mentioned, it's inadviseable to use a restrictor.

I know I've been vocal on this topic; I've seen several turbos ruined due to poor oil line fabrication and routing performed by "professional experts" that resulted a huge amount of out-of-pocket expense and down-time and aggravation for the customer.

GQMRacerX7 · 03-10-05, 11:12 AM

http://www.holley.com/HiOctn/ProdLin...S/ANsizes.html