The test weekend in April had shown the chassis development on the 917 had made them even faster. Jackie Oliver becoming the first person to record a 250 kp/h lap with an incredible time of 3:13.6 equating to 250.5 kp/h (155.6 mph). In June, Rodríguez followed up that form with a 3:13.9 in the JWA Porsche to put a 917 on pole. This was underlined by Vic Elford coming in second, going five seconds faster using the same car as he had the previous year.