The 1973 Trans-Am Series was the eighth running of the Sports Car Club of America's premier series. It began on April 15 and ran for six rounds. Due to the decline of demand for muscle cars in the early seventies and the energy crisis that year, 1973 is considered to be the beginning of the decline of Trans Am. In contrast to American muscle dominating previous years, Porsche won the manufacturers' championship this year. 1973 also saw the rise of silhouette cars as a way of adapting to the decline of performance cars, ultimately making the cars interchangeable with IMSA GTO and GTU.
Results
Round Date Circuit Duration Winning driver Winning vehicle1 April 15Road Atlanta 315 milesPeter GreggPorsche Carrera2 May 5Lime Rock 310 milesMilt MinterPorsche Carrera3 June 16Watkins Glen 243 milesShortened from initial 310 due to heavy fogMaurice CarterChevrolet Camaro4 July 15Sanair 182 milesWarren AgorChevrolet Camaro5 July 28Road America 312 milesJohn GreenwoodChevrolet Corvette6 August 19Edmonton 316 milesJohn GreenwoodChevrolet Corvette
Championships
Driver Peter Gregg – 56 points Al Holbert – 49 points J. Marshall Robbins – 42 points Warren Agor – 39 points Jerry Thompson – 34 points
Manufacturer Porsche – 31 points Camaro – 28 points Chevrolet Corvette – 23 points Ford Escort – 3 points
References