ExtremeNitro: A few years ago there was a product put on the market for "dyno-tuning" your nitro vehicles, in particular a T-Maxx and associated trucks. It was called a "D-Vise Tuning Stand" and it consisted of a chassis that had adjustable rollers on each end so that the wheels of your car/truck would fit into them. Then you would run your car/truck and the rollers would spin under a load that was created IIRC by an electric motor and somehow read or recorded. It was a pretty nice looking set-up but it was costly and the sales were probably not strong enough. So it went away.