Data logging has become an essential tool for professional racing teams in all forms of motorsport who are trying to get the maximum potential from the engine, chassis, and the driver. The equipment to successfully log this data is now available to amateur drivers, builders, and armchair racers, and can be a very cost-effective way of improving your performance. Everything is explained including how to design and install a system, how to interpret the collected data, and how to use this data to analyze a performance. It discusses logging techniques for karts, circuit racing, rallying, hill climbing, sprinting, hot rod racing, stock car racing, and drag racing.