you are getting good feed back. but Nitrofreak is right on the money. what is 80mph if you can't control it. 4 tec is fast right out of the box. no one with the stock rs4, tc3 or yokomo has beaten me yet in a drag race. the 2.5 engine performs well in a 4 tec because it is smaller than the t-maxx. it is the t-maxx that has a lot of problem because of it;s size. think of V6 on semi-truck.
good luck!