I have just acquired a 2003 GT2 and am looking into a power upgrade. I would like some input concerning some of the packages and components available from the various tuners and such? Any personal experiences to share?
Thanks

 

Are you tracking the car as majority use or street.

 

Are you tracking the car as majority use or street. Great looking car added to your fleet

 

This will be a streetcar with some sporadic track use. I already have a GT3R/RSR that I race. I see GMG, Fabspeed as well as EVOMS have various stages of enhancement available. Any info on them as well as others?

 

Hi nycartdealer,

What performance levels are you looking to obtain? Better response (less turbo lag), an ultimate hp goal, or a little bit of both?

 

Hello Chris
I am not concerned with turbo lag but am more interested in unleashing some power. I would like to start with some simple mods like induction exhaust and remap that I can do myself and then if so desired progress to more

 

We had a series of modifications done at GMG but I'm sure you could do them yourself. That did the giac stage 3 flash and supporting modifications to the car . I would suggest your contact Fabryce

 

its just my opinion but my car came with a stage 2+ upgrade from gmg rated at 650+ hp. giac flash was 91 oct so i upgraded to 93 and 110 oct flash. car ran pig rich. dynod 490 rwhp no were near the advertised 650 crank . stay away from giac and search umw, epl or protomotive. there also many shops with in house tuners that can get you plenty of power from the car.

with the proper supporting mods, the k24 turbo can be modded with 18g or billet wheels and get you over 600 rwhp without any issues

 

+1 For Ultimate Motorwerks tune. UMW is local to me, and recently I bought Kevin's tune/datalog for 91oct, 92oct, and stock. Giac and Evoms are both in the 3k+ range in price... Which for a tune is way too much IMO.

Kevin at UMW really seems to know what hes doing, and have a passion for the turbocharged prosches.

I have read a ton about people doing turbo rebuilds using the Mitsubishi compressor wheels... K24/18g and k24/20g's. As far as the Mitsubishi wheels, 911tuning.com uses billet wheels, and I've heard the best things about them.

However, Kevin at UMW builds his own turbochargers, and they are truly a work of art. If I decide to go to a bigger power level from my current ~550 crank, I would be buying his turbo kit (which doesn't use Mitsubishi wheels).

Other Common (Proven) Power Adders:
- Free flowing exhaust (3" + is best, less cats the better, too!)
- Ecu flash (Most cost effective upgrade. 60 crank hp (more/less depending on fuel/altitude) for $1400 from UMW)
-Turbo Inlet Piping (soft/hard) Soft pipings can be installed without dropping the motor. I've heard 25WHP claimed (Not sure if this is true...)
- Bigger Inter-coolers.
- New intake boxes. (I've heard the best about Sportech/UMW's Dual Snorkle intake conversion.

Remember, bigger turbos often require supporting mods:
- Bigger Injectors (sometimes Fuel Pressure Regulator)
- Bigger intercoolers (probably only REQUIRED for big turbos)
- Heavier Duty Mafs
- Better fueling system (Also for huge turbos making tons of power)
- New Clutch to hold power

Good Luck!

 

We have also been speaking to Kevin and are having him build us an entire new race motor incorporating the upgraded components inside the housing to correct some of the systemic issues that page this engine platform. I have heard nothing but great things about his work.

The list given above is great, good luck.

 

Just finished a nice long conversation with Kevin at UMW. I have ordered a Eurosport exhaust, wastegate kit and a ECU retune.

 

Sweet, let us know how it all turns out, beautiful car by the way.

 

Who are you having install?

 

With a tune, new 24.18g turbo,exhaust, air box as mods, what sort of rwhp would one expect at say 1.1 bar boost - any insights? On a 996 Gt2.

 

Great decesion NY. There are few people that make me comfortable on the first conversation but Kevin would be on that short list. Please keep us posted and pull before and after dyno sheets. And by the way take lots of photos you will really want to look back on this upgrade project in the future.