57 trim or 60

[BattleRPs13]

what would be the pros - cons of a 57 trim w/ .63 a/r vs. 60 trim w/ .63 a/r?? oh yes it is a T3/t04E.

[:: orion ::]

What target boost?

What HP goal?

Other setup details: Injectors, MAF, ECU, timing control?

All very important when choosing a turbo...

Fill in the details, then we can plug a couple points on a compressor map and let you know definitively.

- Brian

[WDRacing]

Target boost is a major consideration...not to mention what the car is going to be used for. For the record, I'd use a 50 trim.

[:: orion ::]

For the record, I'd use a 50 trim.

Agreed. A safe bet...

But, let us know, "BattleRPs13"

[BattleRPs13]

the car will be a street car. I Think I will be using the JGS manifold and I am looking for around 250 to 300 whp max and no more than 16psi max. ( plan to use 8.5:1 pistons on stock rods) I would like to have decent spool up but not instant.

[C-Kwik]

What Orion and WD are getting at is that turbos run at different efficiencies depending on boost and airflow. So the turbo you choose may be the best choice at x psi of boost, but not at Z psi of boost. So it would be a good idea to really have a pretty good idea of what boost you will run. The 50 trim is a very flexible compressor and has very god efficiency throughout a very broad range of boost on a KA. Both the 57 and 60 have only narrow boost levels where efficiency even comes close or stays as high as long as it does on a 50 trim.

[D-UNIT]

how bout a 63 trim and a A/R of 0.64. 250 - 300hp. 8-15 psi. W.I.

[D-UNIT]

thought so.....

[:: orion ::]

D-Unit: T04E 63-trim...huh???

And for only 250-300rwhp, use the 50-trim with a .63 A/R turbine, Stage III wheel.

Not the absolute best (SC-sixty-something may be better...? Also GT30, etc...) but for a $550 turbo, it's the best you can do IMO.

- Brian

[C-Kwik]

how bout a 63 trim and a A/R of 0.64. 250 - 300hp. 8-15 psi. W.I.

The largest T04E trim I am aware of and is listed in my turbonetics catalog is a 60 trim. And as far as A/R, are you referring to the turbine? What turbine trim are you referring to?

8-15 psi. W.I. What are you referring to with this?

[D-UNIT]

HKS GT2530R

Sorry for the confusion , but you guys asked - target boost ? and HP goals. I figure I'd lay it all out. I'm only going for 250-300hp because my block is still stock.

W.I. stands for water injection (maybe). What do you guys think now?

[D-UNIT]

More info

Compressor: wheel - 63 trim / housing - 0.60 A/RTurbine: wheel - 76 trim / housing - 0.64 A/R

there , that should do it. I have the Inducer / Exducer specs too. If needed.

how hp is 320ps anyway!?!

KA-T project > wallet!!

[WDRacing]

Thats an expensive turbo for only wanting 300WHP. The turbo Ckwik listed is almost as good and WAY cheaper. Save your money and buy a set of pistons, or a nice methonal injection kit rather then water.

Here's how I would buy a turbo, examine your high HP goal and max boost. Your looking at 1 BAR (14.7) psi or so for 300WHP, give or take a few lbs. Which is right in the T3/TO4E's sweet spot if you select the 50 trim .63 AR stg III wheel like Ckwik suggested.

The GT2530 is awfully small, it has a T25 exhaust housing. I use 2 of them on the RB26. I prefer larger turbo's in general though. I like to leave room for expansion.

WD

[BattleRPs13]

what is the outlet size in the t3/t4? I am curious if i should go with 2.25" or 2.5" I/C plumbing. Again my target is no more than 300whp.?? Oh yea and thanks for the advice you all have me convinced on the 50 trim.

[ftrs13]

outlet on mine is 2", and Im running 2.25 all the way, would have gone 2.5 cold pipe but thats too expensive.

[WDRacing]

I find the best way to measure IC piping is to use the size of the TB as a base line. I won't go any smaller then that. So I usually use at a minimum, 2.5". Although, 2" is easier, cheaper and will flow enough for 300WHP and also has a ton of different hose you can buy for IC pipe connections. Not to mention the local Autozone usually will let you browse the radiator hose selection, which will help with those hard bends.

WD

PS, the intake on the compressor is 3" and the output is 2".

[:: orion ::]

Compressor intake is 3" for most T04E compressors, but my Garrett T3/T4 (TA34) 57-trim has a 2.75" inlet...

Outlet is still 2".

It's the one that http://www.cheapturbo.com sells...

Just FYI...

- Brian

[C-Kwik]

Here's how I would buy a turbo, examine your high HP goal and max boost. Your looking at 1 BAR (14.7) psi or so for 300WHP, give or take a few lbs. Which is right in the T3/TO4E's sweet spot if you select the 50 trim .63 AR stg III wheel like Ckwik suggested.

Gah! WD...I thought you knew me better than that. I'm a fan of bigger turbines. Actually I didn't suggest the .63 A/R Stage III. Not that it's a bad choice, but it has nothing to do with compressor efficiency. It will of course affect overall volumetric efficiency and affect reponse, but does nothing when discussing only the compressor efficiency.

[D-UNIT]

The GT2530 is awfully small, it has a T25 exhaust housing. I use 2 of them on the RB26. I prefer larger turbo's in general though. I like to leave room for expansion.

WD

I'm sure you were running least 20+ psi on that RB with those "small" turbos. I only plan on running half that.Indeed!! I wanted awesome spool. I figured this is a pretty good turbo upgrade for an SR. Also considering it is bigger than a GT28. So I said '' why not so have some HKS bring bring under the KA-T's hood". For now anyway. How do you think it will work. I could always sell it too.