Gt-rs Turbo ! I'm Confused !

[blukie]

Hi

I'm interested in the "Disco Potato" for my Rb25. I have a few questions I hope U guys out there can help me with.

1st Question

Firstly, my understanding is that this turbo is actually smaller than the stock Rb25 turbo and will need some sort of adapter plate to fit on to my exhaust manifold because the flange is too small. I will also have to buy a adapter kit so the water lines and oil lines match up. Is this true ??

2nd Question.

is the HKS GT-RS and the Garret GT-RS the same thing ????

3rd Question (based on the fact the HKS GT-RS and Garrett GT-RS is the same thing)

http://image-cache.skylinesaustralia.com/f...-1141284798.jpg.

This graph shows a GT-RS pulling 300KW. I would GUESS based on the fact it's off a Dyno that is at the wheels. The garrett website http://www.turbobygarrett.com/turbobygarre...RS_739548_1.htm rate this turbo at 250 -360 horsepower. Again I'm GUESSINGthis is flywheel rather than rear wheel horsepower.

Looking at what garrett,s rating (360 Hp) that's approx 265kw then factor in 25% drive train loss gives about 200rwkw. There's dyno results posted here http://www.skylinesaustralia.com/forums/in...pic=55845&st=72 to back up that the GTRS pulled 300 Kw, I just don't understand how this could be based on the rating given by garrett.

I know that Dyno's vary in accuracy but 100 RWKW ???

Edited June 19, 2006 by blukie

[R31Nismoid]

your confused.

the HKS GT-RS is around 500-550hp rating.

the Garrett Disco is a GT 2860RS... not a Garrett GT-RS as you have coined it

[Kaido_RR]

your confused.

the HKS GT-RS is around 500-550hp rating.

the Garrett Disco is a GT 2860RS... not a Garrett GT-RS as you have coined it

umm

the hks gt-rs is rated at 400hp (dont know where you got 500 from)

mate has one on his rb25det s2 r33 making 350rwhp @ 16psi

[BHDave]

the 52 trim garrett 2871 runs the same wheels and housing a/r as the gtrs in t2 flanged form. I think there is a bit of a difference between the t2 and t3 flanged versions of the gtrs, most obvious being the bypass slots in the compressor inlet which are supposedly to eliminate surge.

[Busky2k]

The turbine housing is also different. I would suspect that the T3 housing the skyline version is using is better than the T2 one because of the wastegate location.

[tacker]

GT_R_Turbos.htm

Not sure but this may help out as it gives all the flange types

http://homepage.ntlworld.com/tbroom/Turbos.htm

Edited June 19, 2006 by tacker

[blukie]

Thanks for all the info guys. I always thought the Disco Potato and the HKS GTRS were the samething.

It's amazing that thizzle is getting 300 kw (rear wheels I suppose) from a huffer only rated at 400ps. Are manufacturer's conservative on their ratings ?? DO they do their ratings based on 1 bar maybe ??? ( thizzle's running 1.38).

[Kaido_RR]

if i remember right the hks gt-rs is 400ps at 1.2bar

[Busky2k]

Most turbos arent rated at any boost pressure.

Most are rated by the absolute max flow of the compressor (choke line) and adjusted then by roughly how well the turbine flows.