Firstly, I am not connected in anyway to this shareware/program.

Just wondered if anyone uses CarTest for scooby mods, I've used the program for several years for fun.

www.cartest2000.com

Able to see acceleration differences based on gear ratios, hp, tourqe, tire dimensions, launch methods, weight, compression ratios etc etc.
You can also race comparison cars around tracks & the dragstrip.

....great fun!