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ADAC Nurburgring 1000Km 1971

Superb archive footage from the Nurburgring 1000Km held as part of the World Sportcars Championship in 1971. 1971 was the last year that the monster 5.0 litre Porsche 917 and Ferrari 512 were allowed to compete in the championship. Despite this Porsche considered the smaller more nimble Porsche 908/3 to be more suitable for the circuit that the 5.0 litre monsters, although private teams still entered them. 

Ferrari was already looking to the next season and had handed the big 512s over to private teams to concentrate on developing the 3.0 312PB. It was the sole 312 driven by Jacky Ickx and Clay Regazzoni that took pole (with a lap of 7 minutes and 36 seconds). To complete the works teams Alfa Romeo entered three T33/3s.

Straight from the start it was clear that Ickx and the 312PB were the class of the field and after four laps had a lead of over 25 seconds.  The new car was rather fragile though and at the end of the sixth lap Ickx came into the pits with overheating problems. The mechanics entered added more water and Ickw rejoined in fourth place. By Lap 12 Ickx was back in the lead, and had again built up a lead of some 25 seconds when he handed over to Regazzoni on lap 15. This gallant effort all came to nought though as the overheating returned and the Ferrari was out of the race on lap 21. 

Vic Elford and Gerard Laurousse would take the win in a Porsche 908/3 from Pedro Rodriguez and Jo Siffert in their sister car. 

The cause of the overheating in the Ferrari was diagnosed as a failed cylinder sealing ring

Reference Scarlet Passion by Anthony Pritchard