How NASCAR cheaters beat officials at Daytona
NASCAR rules are strict about sucking air – getting extra air into the engine cylinders by bypassing the restrictor plates that are designed to limit horsepower by choking down the air – and the penalties can be stiff. However no penalties were levied at Daytona. One key trick apparently was semi-legal – using a steel gasket instead of an aluminum gasket, and taking advantage of the gap of 10-thousandths-of-an-inch created when engine heat distorts the steel gasket. NASCAR officials realized they had a problem when they discovered that some of Daytona's fastest qualifiers were using engines that couldn't pass NASCAR's post-qualifying manifold leak tests. NASCAR officials were unable to confirm the legality of front-row qualifiers Jeff Burton and Jeff Gordon until six hours after qualifying had ended. In response, NASCAR quietly changed some of its rules for Talladega, and some teams that had qualified very fast at Daytona were noticeably slower. Winston Salem Journal