Thoughts on GT-SS TURBOS

[meshmesh]

I'm interested to see a dyno sheet of a GTR with the GT-SS turbos... does anyone know of one floating around? I mean I could wait for the Merlstar, but all this talk is getting me excited and starting to be alittle impatient

[Merli]

If you think you're getting impatient and excited, spare a thought for poor little me!!!

The car is in the workshop as we speak, and I'm going in tomorrow morning to take photos of the engine which has just been completely stripped down

[MrNismo]

Hi guys, I do have a GT-SS installed in my 33. We dynoed the car on Dynapack and get 430awhp & 530awhp on 1.25bar and 1.6bar respectively. I have the dynochart uploaded here.

The car is running on the following specs:

- 264 IN/EX cams 10mm lift

- P&P head

- 87mm Forged Pistons

- Standard rods & crank

- F-Con V Pro

Boost comes in very early on the GT-SS and it'll hit 1.4bar on 4th&5th gear before 4000rpm on my setup.

[Merli]

530awhp = 395awkw...

:uhh: :uhh: :uhh:

[SR910]

dynapack is a hub type dyno? if this is so it can be a reson for higher readings to a normal chassis dyno.

[meshmesh]

woooo hooooo!!!!! 320kw @all 4 from 1.25bar!! that's better than the 2530's!!!

[lwells]

Yeah, but how do the rev ranges (ie. response) compare?

LW.

[Serious-Seven]

...... waiting for merli's photo's :headspin: .

[Sydneykid]

dynapack is a hub type dyno? if this is so it can be a reson for higher readings to a normal chassis dyno.

Subtract about 20 to 25 rwkw to get Dyno Dynamics (roller) comparison.

[Serious-Seven]

Subtract about 20 to 25 rwkw to get Dyno Dynamics (roller) comparison.

so SK what turbo's would you prefer on your totaly stock Rb26....

the GT-SS bolt on or 2530 Bolt on ?

what would do a better qtr mile at say 20PSI.

what would have better "response"

thx

[Sydneykid]

so SK what turbo's would you prefer on your totaly stock Rb26....

the GT-SS bolt on or 2530 Bolt on ?  

what would do a better qtr mile at say 20PSI.

what would have better "response"

thx

Honestly S7, I have no idea. :headspin: I have never tried a set of GT-SS's. Looking at their spec I would say they sit somewhere in between 2510's and 2530's. I have tried 2510's and they were great on a road car, but went a little flat over 6,500 rpm in the higher gears (3,4,5). The 2530's seemed not to loose much in the lower rpm, but didn't start to run out of airflow until 7,500 rpm in the high gears.

Like everyone else I await the GT-SS results :wassup:

[Serious-Seven]

Honestly S7, I have no idea.   :headspin: I have never tried a set of GT-SS's.  Looking at their spec I would say they sit somewhere in between 2510's and 2530's.  I have tried 2510's and they were great on a road car, but went a little flat over 6,500 rpm in the higher gears (3,4,5).  The 2530's seemed not to loose much in the lower rpm, but didn't start to run out of airflow until 7,500 rpm in the high gears.

Like everyone else I await the GT-SS results :wassup:

great, cant wait to see the results.

[Merli]

My engine gets shoehorned back into the car tomorrow

Even with a 30rwkw advantage of the Dynapack, that's still 365awkw @ 1.6 bar from the GT-SS... That doesn't sound a little high to anyone else?

I'll be happy to crack 300awkw

[lwells]

Merki: wicked. So when does it hit the dyno?

LW

[Merli]

I'm not sure... I have to call the tuner tomorrow and see when we can fit her in :headspin:

I didn't want to book it in until I was sure the car is ready to go... There are too many things that can hold an engine build up for me to forecast when the car would be ready to be tuned, so I didn't book in advance

[lwells]

Can't wait to see the results (heh, I can imagine its worse for you ). Any chance of getting the dyno graph to include RPM so we can have a look at response (the whole KMH thing is too hard for my tired brain of an evening)?

LW.

[Merli]

Mate, I'll try and supply as much information to you guys as I possibly can

I'd like to get a printout of boost vs. rpm as well... I'll see what I can persuade the tuner to give me... A few are pretty anal about printing out A/F ratio graphs as they think they're giving away trade secrets :Oops:

[jezzrrr]

Subtract about 20 to 25 rwkw to get Dyno Dynamics (roller) comparison.

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.

[Sydneykid]

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.

Hi Jezzrrr, that's 20 to 25 RWKW, not AWKW. I have never tested a roller dyno and a hub dyno back to back on a high power 4WD, like I have 2WD. I suspect just doubling the RWKW difference to get AWKW difference would be a bit pessimistic. I reckon 35 to 40 AWKW might be closer. So 395 AWKW subtract 40 AWKW = 355 AWKW.

That's still a damn good result

[Roy]

What cams would you run with the GT-SS, if they are coming on song so early perhaps you can run some decent sized cams, in effect allowing the response of the GT-SS to mask the loss of response in the bottom end.... me doesnt know just thinking out loud?!?!?!?