MacDonald Motorsports has a Dynojet 248H Chassis Dynamometer it uses for its Mustang Dyno Testing. This is the Big Gun in the world of Dynamometers. It is an Inertia Dyno for dependable and repeatable sampling results. The Dyno also has load-bearing capabilities to simulate the weight and mass of the vehicle being tuned. It is capable of handling wheel speeds in excess of 240mph, and is able to handle up to 2500 horse power at the wheels. Most other Dyno’s only allow for 1000 – 1500 horsepower, and about 160 mph.