most people dont get a chance to get the car tuned in the upper RPMs of 3rd and 4th because they never get going that fast. the car leans out with more load the faster you go. i also dont see a whole lot of reason to be going almost 150 in a grand prix. i would lose a race because someone would keep going and i would let off. ive never even gone off my speedometer, which is 115. i just see no point.