Simulation Software

Is anyone aware of simulation software that will estimate a car's performance based on a car's configuration?

I am looking for something to help me figure out the best combination of engine, gear ratio, tires, headers, etc for my car.

Thanks,

MTmace

Desktop Dyno 2000 or 2003 would probably be the most well known one...

you can download the demo, but im sure you could find a full verison or crack if u looked

CarTest 2000 is popular and accurate but not free, someone on here might have it and plug in the info for you.