I believe the Porsche factory says these cars have 10% drivetrain loss, maybe conservative? Would be spot on though.

Here is a dyno from an 997.1 stock GT3 using the same SAE correction as the first one on top to compare the MK1 to MK2 side by side:

MK1 GT3 (366 whp)


MK2 GT3 (395 whp)

 

wow these numbers are very impressive and im sure the akrapovic will be a nice addition to the chart, but i would suggest a tune if you plan on getting the most power out of the exhaust, im sure you already know this though

 

Wouldn't bother with a zorst on thsi car personally. May loose power and never get let on tackdays.

 

Oh, I will I will dyno the exhaust alone and then with software. I just want to see the results of the exhaust by itself first. The tune will be nice since the Akrapovic race system has 100 cell cats. I also wonder the effects of 100 octane gas...

Anybody got experience with 100 octane gas/software and GT3 engines? I know the E9x V8 M3's gain about 25 HP by just using 100 octane... Just curious....

 

10% is the lowest amount of loss I have ever heard of. That's bizarre almost.