It won't do 80mph. Just to let you know. It takes off at about 65.

80mph is a theoretical maximum based on rpm and gearing. If it did 80mph, you could enter it in the fatest nitro in the world contest. The official nitro speed record is not much over 80 if I remember correctly.
It's really not a good value car, honestly. It has similar handling issues to the 4tec, even though the chassis is much better. This is for parking lot dragging. Once again, the RS4 is a better more versatile machine. You won't easily get any 1/10th car over 65ish, adn the RS4 can be made to do that with standard gearing options from hpi.