Thoughts on GT-SS TURBOS

[Merli]

I've gone for a 260 IN/260 EX Tomei PONCAM setup... But I won't be doing before and after dyno runs and tuning, so I can't say what the effect would be

[MrNismo]

Thats still one hell of a figure though - 395AWKW subtract 25 = 370 AWKW on roller dyno - Ide be suprised if GTSS (on pump fuel) made that type of power.

We dynoed the car with Singapore's pumped V-power. 100RON as told by the tuner. Btw that power is obtained by almost maxing out 680cc injectors. Of course it's not gonna run on that boost everyday with the stock rods. :wassup:

We have roller dynos here but they all give different results. I was told by the dyno operator that various factors can affect the results of roller dynos such as how tight the car is strapped down and even the alignment figures. How true was it I don't know. Perhaps someone can explain.

Pictures here.

http://www.skylinesaustralia.com/photopost...500&ppuser=7538

[jezzrrr]

well its an awesome ressult either way.

[mambastu]

Any results yet Merli ?

[RS500]

did anyone take notice of MrNismo's engine specs?

The cengine is running with the following specs:

- 264 IN/EX cams 10mm lift

- P&P head

- 87mm Forged Pistons

- Standard rods & crank

- F-Con V Pro

note that he has oversized pistons (larger engine capacity), higher duration/lift cams and a modified head which would've contributed greatly to this great power result.

given this, obviously the GT-SS would not make the same power on a standard spec RB26.

Also, as mentioned above, the fuel used was 100RON which allows for more enhanced tuning again over what we have availabel with 98RON (if that) fuels.

[RS500]

Also, fyi has anyone looked at the official HKS website for the power/torque results of an RB26 with GT-SS'?

if you look at the web link below, you will see that they managed to extract 422kw (565bhp) @ 7070rpm and 629Nm of torque @ 5150rpm whilst pushing the turbos to 1.4 kg/cm^2 (~20psi).

these are great results and the power curve looks mighty fat, i am not too sure as to what this would equate to at the rear wheels or all 4 wheels.

http://www.hks-power.co.jp/products/turbo/...ss/ac_gtss.html

oh another thing, please note the mods listed below;

* IN & EX cams - 264 degrees (lift ???)

* HKS F-con V Pro

* HKS Racing Suction intake system

* HKS exhsut, muffler, extensions & front pipe

and in addition;

* 2628cc engine capacity

have a nice day

[williamsf1]

Ok I am dragging this back from the dead!!!

As some of you might know, I have a set of these GT-SS turbos going on the car (today!!!) with the following combo....

rebuilt stock engine

tomei poncom cams 260 260 9.15

greddy split dumps

700cc injectors

RB20 AFMS

apexi FC

blitz SBC spec R

and the usual other bits to go along with it all....

is anyone else running these of late? and if so what sort of boost levels are we talking?

I will post some full specs and dyno reports once it is all done!

does anyone else have any dyno sheets with similar mods?

cheers...

[Steve]

looking forward to seeing the results

[600hp]

We have already posted up our results of 367AWKW on croydon racing developments dyno dynamics dyno in the motorsport section in the post of 11.7sec with GT-ss turbo's.

These are great turbo's and they make good power.

We make 332awkw with out quiet trust exhaust.

and 367awkw with our straight through 4''.

[voona]

So whats the general idea here. Is it 2530s or GTSS's ?

I still have to choose ..

[Guest two.06l]

So whats the general idea here. Is it 2530s or GTSS's ?

I still have to choose ..

No you dont...there is nothing to choose between...2530's it is

[williamsf1]

but 600hp that is a "built" engine.... mine is just a humble stocky rebuild Im sure these turbos on a 20k engine would make great power too.... a bit like the stace racer

horses for courses.... as they say!

[saga]

So whats the general idea here. Is it 2530s or GTSS's ?

I still have to choose ..

after reading all posts in this thread, i would go for GTSS's.

[SLY33]

That is extremely elementary physics and flow dynamics, and I'm sure everyone realises that boost is just a measure of engine resistance to airflow.

start a poll and see how many people really understand even elementary physics and flow dynamics! I did physics at uni years ago, but bugger if i can remember it now!

I like Sk's explanations, and i think its good to get things explained in a back-to-basics way, especially when there is so much misconception about boost, power and efficiency floating around.

Usually the first question people ask me on the street about my car is "How much boost is it running!!?" I think that sums up the main misconception about turbo systems!!!

[SLY33]

That is extremely elementary physics and flow dynamics, and I'm sure everyone realises that boost is just a measure of engine resistance to airflow.

start a poll and see how many people really understand even elementary physics and flow dynamics! I did physics at uni years ago, but bugger if i can remember it now!

I like Sk's explanations, and i think its good to get things explained in a back-to-basics way, especially when there is so much misconception about boost, power and efficiency floating around.

Usually the first question people ask me on the street about my car is "How much boost is it running!!?" I think that sums up the main misconception about turbo systems!!!

a bit off track, but i dont want SK to get discouraged!

[williamsf1]

GT-SS are fitted! and I am now just awaiting the tomei cams which are hopefully here in oz by now also....

SK how is the JD looking?

[600hp]

Look foward to the results!

Good Luck,once you have the cams installed you will notice your power band get bigger.

[discopotato03]

What spec turbine / compressor and housings do these use , I searched HKS but could not find them

Cheers A .

[RS500]

What spec turbine / compressor and housings do these use , I searched HKS but could not find them

Cheers  A .

which site did u go to dude?

i usually go to either of these below for all HKS references;

http://www.hksusa.com

or

http://www.hks-power.co.jp

[Mik]

Funny thing about GT-SS turbos is that some have .42 A/R comp housings and some have 0.60A/R comp housings.

Before anyone says that the .60 housings are only for SR20, I have seen a twin kit for a GTR that had 0.60 compm housings.