Hi everyone, I'm new to .1 GT3

Previously, I have owned a 2007 C2S with performance mods: Softronic ECU, X51 headers, AWE Cats + Mufflers...

I test drove the stock GT3 yesterday and I felt like it is a bit slower than the modded C2S in terms of its 2nd gear acceleration. It was not much powerful than I expected. Is it normal? Or I did something wrong?

Please help me on this butt dyno issue.

Thanks for the laugh.....GT is 415' 20 hp more if u flash. S car with those mods on a dyno, would likely be sub 400 still. Better gearbox on GT3 and better suspension parts, better/lighter internals on the motor, etc.

Probably just your perception, but TurboDogue is correct. The GT3 will weigh less overall than the modded C2S as well, so the power to weight ratio is better in the GT3. Put both on the track and the GT3 will turn much faster times given the same driver. Another thought is that the RPM needs to be going through the sweet spot before you shift to get the most out of what the GT3 can do.

This is what I was thinking. Torque in the GT3 is higher up in the RPM range, so if you were driving it like a C2S, it may not feel as fast as the C2S.

I see

I believe that was the problem! Then what would be the ideal RPM range?

I would say around 6500.

Bouncing off the red