Ep 54. The Racers Edge

Tom and Annie turn their scientific expertise toward go-karting when their friend Howie is challenged by a hot shot racer to prove himself on the track in an upcoming race. After working through some mechanical problems fixing up Howies Kart, the day of the big race arrives and the twins are confronted by more problems. They learn that Howie, a former racing champ, has lost his nerve, and that the challenger has copied a flawed spoiler design discarded by the Edisons that could spell disaster on the race track if the spoiler gives way.