who knows about garrett gt25/40r

[aronmatic2]

i want to change my kkk k26/27
i have 2 idea.

1.garrett gt25/40r:

DUAL GT STEEL BALL BEARING CENTER SECTION
TURBINE SPECS: T25
.86 A/R HOUSING
76 TRIM GT SERIES WHEEL

COMPRESSOR SPECS: TO4S HOUSING
.70 A/R HOUSING
48 TRIM GT SERIES WHEEL
COMPRESSOR FLOW: 44 LBS/MIN
4 INCH INLET


2.hks gt28/40:

Garrett 50 A/R Compressor Housing Remechined, chrome dipped.
HKS Turbine housing .73 A/R for T2 flange and Hks 4 bolts exhaust flange.

Garrett T2 Series Cartridge with water coolent port, With a 360 degree race Ball bearing, and journal bearing system.

Garrett Compressor Wheel, Rated 650Hp at 32 psi with a 61mm Compressor, 2.416 Inducer ,3.226 Exducer , 56 Trim.

HKS G28 Turbine, 2.795 Inducer, 2.436 Exducer with a 76 Trim.

what is the better for me?

my mods:
tt pistons
factory s2 conecting rods
porsche orange injectors,ecu
7a camshaft
home made EM
s4 IM
lancia exhaust valves
kkk k26/27 turbo
large cooler
s6 6 gang trans

[PekkaS]

Wait till next week, and I´ll have GT25/40 running... Should be remapped by end of December.

[aronmatic2]

Wait till next week, and I´ll have GT25/40 running... Should be remapped by end of December.

what kind of injectors you using?
what was your previous turbo?

[PekkaS]

I have Bosch "blue-tops" part number 0 280 150 967, almost same as RS2 ones. Previous was stock K24 with stock injectors.

[Billman]

@Aronmatic

The TT pistons are better than the Rs2 Pistons? What is the compression?

@PeKKaS
At what Bhp do you think you will go? What are mods do you have?
the turbo is from 034EFI???

Greetings

[aronmatic2]

@Aronmatic

The TT pistons are better than the Rs2 Pistons? What is the compression?

@PeKKaS
At what Bhp do you think you will go? What are mods do you have?
the turbo is from 034EFI???

Greetings

yes, its better. compression is 8,5.

[Greg_S]

what EGT probe is it you are using? got any details of where to buy them?

Greg

[aronmatic2]

what EGT probe is it you are using? got any details of where to buy them?

Greg

Greg

what is egt

sorry about my poor emglish

[s2-1.5bar]

I think EGT stands for exhaust gas temperature probe.

Correct me if I wrong

Cheers

[4WheelDrifter]

Correct!

[Billman]

@Aronmatic
you have 8.5:1 compression only by putting TT pistons? Why are these pistons better? As far as i know with the Stock S2 many people with 550 BHP have no probs!

[4WheelDrifter]

Has anyone got any pics of TT pistons? I'm just wondering how they compare to stock ones.

[aronmatic2]

Has anyone got any pics of TT pistons? I'm just wondering how they compare to stock ones.

i think, the tt pistons not better or stronger than the stock ones, only lower compression. that is all.
i am totaly satisfied with them. i will try to find pictures of the pistons, but i dont think i have.

[PekkaS]

what EGT probe is it you are using? got any details of where to buy them?

Greg

I´ll have apexi el-series egt- and boost gauges.

http://www.apexi-usa.com/meters_elgauges.asp

In Finland they have several distributors, I got mine from here:

http://jynssi.hohto.net/apexi.html

[PekkaS]

@Aronmatic

The TT pistons are better than the Rs2 Pistons? What is the compression?

@PeKKaS
At what Bhp do you think you will go? What are mods do you have?
the turbo is from 034EFI???

Greetings

At the moment I´m using original maf, so it limits power somewhere near 420hp. I have stock internals except from autoverdi rods and sachs race-engineering clutch. Turbo came from ATP-turbo.

http://www.atpturbo.com/