The Green Machine is a stock motor, and like any stock motor they have 27T ( T= turns ). They also use bushings instead of bearings which are found in a Modified motor. A modified motor is the way to go if you want speed but things will run a bit hotter and run time will decrease. A 15T mod motor in a T3 with the stock gearing or can hit a good 30mph+. Also, I think on someone had a BL system in their T3 or Rustler on some other site as well as a TC3. The TC3 I saw was VERY fast but it needed 10cells to achieve such speed and the batteries did get scorching hot. Dont let this discourage you from buying a BL system. In the long run it will save you cash since it requires little or no maintainance. BTW, here's a site (belonging to a friend of mine on another BB) and he has some videos of his T3. Look for the one that shows it with a 15T motor for the link name. When your done watching, you'll get an idea of how fast your truck will go with a similiar motor and gearing.