Porsche Formula racing car Porsche are best known in motor racing circles for their achievements in sportscar racing particularly their achievements at Le Mans They did briefly compete in Formula as well entering cars for the and Grand Prix seasons after the Formula competition which they had dominated was cancelled The cars were reasonably successful with Dan Gurney achieving three second places in In he went one better winning the French Grand Prix It would prove to be Porsches lone Grand Prix triumph however as when the regulations were changed after the season they withdrew from Formula to concentrate on sportscar racing