What's the difference between giac (stage 4gt) and the upsolute ecu mod??
 

i have stage 4gt extremely happy what does the upsolute offer?

Not nearly as much, but it is a whopping $500.00 mod. Great bang for the buck. I am not sure what upsolute performance numbers are but I am sure someone here will chime in with some HP numbers.

I have the UpSolute on my 03TT. With no other mods, it dynoed at 417 HP on AWE's 4 wheel dyno.

Upsolute & Fabspeed- 460 rwhp and TQ was high 500's...

More responsive and quicker than Stage IV Giac (not saying faster). IMHO

My dyno'd 455 rwhp and 505 ft-lb tq at the wheels.

http://1stephen1.com/cars/miscpix/upsolute1

sld7... double check your numbers, as Upsolute is not suppose to dyno high 500s (unless you meant corrected tq and not at wheel).

Here's some fun reading on that topic...

https://www.6speedonline.com/forums/...&threadid=6375

Seems like that thread died out right when "answers" were supposed to be forthcoming...

Yes, it was corrected torque...

The interesting part was as good as the HP was the Torque was significantly higher.

Anyone know why?

First of all, we should understand that there's nothing wrong with an engine producing more torque than horsepower. There are many variables that dictate how the torque curve will be, which in turn affects the horsepower curve. Porsche designed our flat-6 turbo to have as broad of a torque curve as possible most likely for driveability reasons. That is not to say that a peaky motor is not driveable, but simply that the average person can put a broad-torque curve to better use than a peaky setup.

The output characteristic is derived through a combination of cams, turbine wheel, compressor wheel, ign, etc. A larger turbo setup could be used that would trade in some low end for more high end. By shifting the torque curve up the rpm spectrum, you'd get higher hp at the expensive of peakier delivery.

With a displacement of 3.6L, our motor can actually be paired with much larger turbos (given the proper cams). The limitations that come into play would be how stout the bottom end is. Case in point, the Supra Turbo is so strong that the stock bottom end can be paired with a Turbo that'll put out 1000HP.... and that's out of a 3.0L engine. The torque curve looks very different than ours, but you get the idea. It's simply a matter of sizing the turbo, cam specs, etc to get the torque curve to the desired shape.

Stephen
'01 Turbo Ti Upsolute

Here were the results from that day:
Dark Blue: Cargraphic Exhaust, Upsolute, filter (my car)
Red: Cargraphic Exhaust, GIAC, DV valves, filter
Light Blue: Stage IVGT on a GT2

http://1stephen1.com/cars/miscpix/upsolutevsgiac

The reason that the thread died is because nothing happened. Todd and Stephen have not come out yet to repair the two Stage 4GT cars.

sld7 - you got PM
996TTR - let me know if you decided anything

MSINDI- I have not received your PM?