Although this is an awesome Wii hack using GlovePie and the Wiimote, you could probably do this a lot easier using a simple 3-axis accelerometer and a microcontroller. I got this idea after seeing some physics class use the wiimote in some kinda pendulum experiment. Why not use ...

Remember our G-Meter in 1 Minute? You could probably refer to this for getting acceleration, braking, and horsepower. ...