I used my new AX22 performance Computer. Compared '01 996tt with EVO stage 4 and '03 GT2 with upsolute and cargraphics exhaust. We adjusted both cars to weigh 3550lb for the runs. We are using same size and brand of tire. Temp was 65 deg. The graph shows max acceleration in 4th gear to redline. Y axis shows g-force.
Yellow = Stage 4 car
Pink = GT2

 

Kool! Does the X axis show time or distance?

 

I contend that upsolute generates higher peak torque but GIAC produces a fatter torque curve. Comments?

 

I exported the data to excel. Each data point represents .01 sec
I have tons more data

 

Do you have the formula to convert the G's to HP or TQ and do up a chart showing this?

 

Here is a part of the GT2 run

 

Here is part of the stage 4 run

 

TQ is proportional to g force, if you ignore wind resistance, which is not linear but essentially equal between the 2 cars. Therefore, the 'real' TQ curve will not fall off as much as the graphs show at high speed, but comparing them is valid.

 

Do both cars have K24 turbos?

 

K24 is standard on the GT2.

So which car is faster?

Me thinks the GT2 will still be faster since the drivetrain is more efficient-- less parasitic loss, plus the clutch apparently is better at transferring torque/power to the ground as well.

 

I thought his 996TT had hybrid turbos(?)

 

A 4wd car compared to a 2wd will have show less whp which is what you are showing.

Jeff

 

GT2, by a couple of hairs.

 

Is the Upsolute program the standard GT2 program? That's what I have, and I'm quite happy with it.

 

Yes

Stage 4 has K16 hybrids.