Oil-cooled only turbos?

[85rx-7gsl-se]

No go on a rotary?

[djmtsu]

Funny you are posting this now, as I had the same question.

Since I am boosting the 12a, and I have to find a source/return for coolant I did some research on it.

The JDM 12aT had a very similar turbo as the S4/S5 FC's, a Hitcachi HT-18. They did not have coolant provisions, oil only.

So, after asking around to a few guys with 12a turbo set-ups, most do not run coolant on theirs.

I am taking a gamble, and am going to rum it oil only.

PS- Nate, I need that S4 manifold!!

[85rx-7gsl-se]

Haha I know you do. Are you planning on trying to run the twin scroll or not?

[djmtsu]

No twin scroll for me!

I am still collecting parts, so no biggie. If I NEED it, I will PM you some $$$ for shipping.

[mazpower]

I've been running a Turbonetics T-66 non BB turbo on my FD since '07. Its not water cooled. Just be mindful of the turbo and you'll be ok...drive easy the last few minutes of your drive, let the car idle for a minute or so, and change your oil frequently. If you beat on it, give it 3-5 minutes of idle before shutting off. You'll be fine.

[85rx-7gsl-se]

Good to know. I have been looking at a few oil cooled only to4e turbos and wasnt sure of how big the downside was.

[85rx-7gsl-se]

Here is the specs on the turbo...Thoughts?

Compressor: 76mm wheel w/ 50 A/R housing
Center section: Garrett oil cooled only
Turbine: 1.15 A/R divided to4e

[djmtsu]

Pretty big turbine A/R, but you have a healthy street port right?

[RETed]

Water-cooled centers were for paranoid jackasses who were scared of oil coking due to shutting off the engine after a hard run.
NONE of us do that, right? :)
It's the same for turbo timers - remember those? :D

If you're mindful of "cooling down" the turbo, then there is no need for the added complexities of a water-cooled center.


-Ted

[85rx-7gsl-se]

Pretty big turbine A/R, but you have a healthy street port right?

Meh its a racing beat template mild street port. Charles knows the specifics since he did it lol.

[Mazdabater]

Im looking at getting the EFR-9180 from BW. Ive noticed it says "water cooling optional but reccomended" so there is no real gain aside from when you shut it down? Because when i installed my current turbo I blanked off the water outlets on the engine for the turbo lol

[730RWHP12A]

no water needed for turbos to last, save the water for the fish :)

[85rx-7gsl-se]

What is anyones thoughts as far as the listed turbos size considering its going on a mild streetport 13BT.

[730RWHP12A]

What is anyones thoughts as far as the listed turbos size considering its going on a mild streetport 13BT.

very laggy with that massive turbing housing

[85rx-7gsl-se]

That was my fear. I should have picked up a NOS Holset H1e with the 19CM housing for $375 when I had the chance lol

[85rx-7gsl-se]

Found another turbo from the same guy that may be a better fit:

Compressor: .60 A/R T04B Cover, 51.56mm inducer/70mm exducer, 3" inlet, 2" outlet
Oil cooled Garrett center
Turbine: 1.00 A/R Divided T04 Housing with 3" V-Band outlet

[RETed]

You really should start a new thread with a proper Title...

That turbos sounds like a T04B, T5/T6 compressor wheel - my specs show 2.032" / 2.750" on the compressor wheel.
It's really too small for a 13B.
It maxes out at around 250 - 260 at the wheels on a DynoJet.
I used to run a compressor upgrade with that T5 / T6 wheel before and managed to make 254 at the wheels on a DynoJet @ 15psi.

I dunno what kinda spool you're expecting, but a 1.15 A/R turbine shouldn't be that bad.
In terms of compressor wheels, I'd try and look for a T04B V-trim or H-trim, 60-1, or T04E "57 trim" or "60 trim".
These turbos will produce anywhere from 300 to 400hp on a DynoJet up to 15 - 18psi of boost on the edge of pump gas.


-Ted

[85rx-7gsl-se]

Good info. Guess I need to study up more on compressor wheels. But you think the first one listed would work ok?

[RETed]

Here is the specs on the turbo...Thoughts?

Compressor: 76mm wheel w/ 50 A/R housing
Center section: Garrett oil cooled only
Turbine: 1.15 A/R divided to4e

You talking about this one?
Whoever is giving you the "specs" of the turbo is an idiot.

I need at least inducer and exducer diameters of the compressor wheel.
The compressor housing A/R is basically useless.

(For turbine side, the turbine A/R and turbine wheel trim is minimum info.)

All the 3" (exducer diameter) compressor wheels I've seen range anything from a T04B S-trim (which is basically the same size as the stock Hitachi HT-18) all the way up to a 60-1 / 62-1.
So you're talking power potentials anywhere from 250hp all the way up to 400hp.
See what I mean by useless?


-Ted

[85rx-7gsl-se]

Yeah I see. I have actually been thinking about this and decided I probably should just explore the limits of my BNR stage 1 instead of going to a bigger turbo.

[PercentSevenC]

no water needed for turbos to last, save the water for the fish :)
So does this also apply to turbos with water-cooled CHRAs, such as a stock FC turbo? Because I'm not running water lines to my S5 turbo. It hasn't died yet. :dunno:

[classicauto]

FWIW, I've cooked a non-watercooled turbo before.

T04-S, the shaft was blued all the way up to the compressor wheel. Did it happen right away? no. Did it last a good while? Yes - about 35,000kms. Was I easy on the car? No. Beat the ever loving piss out of it daily.

I've always fitted water cooled centers on after that. Any turbo builder worth his salt can source a water cooled center for almost any turbo. For the extra change and two lines I like the added long term insurance of the extra cooling.

But it certainly works without, just works alot longer with. EDIT: espeically a turbo that is sized for response with a relatively small backside, since there'll be more heat retained in that arrangement.