questions. Does the belts that come on the car give accelartation or top speed? Which one?

Is it possible to convert this to a rally car? I no the traxxas 4 tec has a rally kit but what about the CT5? How can I raise the ground clearence?

Will these tires fit on the CT5 without rubbing up against something. Will they fit on standard touring car wheels? http://hpiracing.com/hpitires I am looking at the Rally Tire Soft Compound. Part# 4471.