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On August 9, 1975, Donohue drove the 917–30 to a world closed-course speed record at the Talladega Superspeedway in Talladega, Alabama. His average speed around the 2.66-mile (4.28 km) high-banked oval was 221.120 mph (355.858 km/h). Donohue held the record for 11 years, until it was broken by Rick Mears at Michigan International Speedway.
Rick Mears broke the world closed-course speed record with a lap of 223.401 mph. The previous record had been 221.160, set by Mark Donohue at Talladega Superspeedway in August 1975. Mears was nearly four miles per hour faster than Al Unser in second place at 219.552 mph. Bobby Rahal completed the front row with a speed of 218.759 mph. [ 5 ]
Foyt set a new speed record with the long-tail version the next day, averaging 267.399 mph (430.337 km/h) after flying-mile runs in both directions of the track. Subsequent runs made with the now modified short-tail version resulted in a new closed-course speed record of 257.123 mph (413.799 km/h), beating Mercedes' record by a large margin. [1]
Foyt holds the closed course speed record driving the Oldsmobile Aerotech at an average speed of 257.123 miles per hour (413.799 km/h). He set the record on 27 August 1987 at a 7.712-mile (12.411 km) test track near Fort Stockton, Texas. Despite having won more USAC sanctioned events than any other driver Foyt never won a CART sanctioned event.
The category that the car had been created for and competed in was discontinued and in 1975 Donohue drove this car to a closed-course world-speed record of 221 mph (average)(356 km/h) at the Talladega Superspeedway (then called the "Alabama International Motor Speedway"). It was capable of 240 mph (386 km/h) on the straights.
Report on Buddy Baker breaking the world closed-course speed record of over 200 mph at Talladega Superspeedway. Phoenix 150 – Live coverage of the race in segments. Florida Derby – Live coverage of three races. April 18 1970 Gwyn Staley 400 – Live Coverage of the latter stages of the race. May 2
The closed-course practice and qualifying lap records Arie Luyendyk had set in the run-up to the 1996 Indy 500 at 239.260 mph (385.052 km/h) and 237.498 mph (382.216 km/h) respectively were improved by Maurício Gugelmin at the 1997 Marlboro 500. He was clocked at 242.333 mph (389.997 km/h) and 240.942 mph (387.759 km/h) respectively, based on ...
The closed and partially demolished Texas World Speedway, was the original "sister track" to Michigan. The two-mile oval, with its 22-degree banking, was the site of Mario Andretti's closed-course record of 214.158 mph (344.654 km/h) which stood for 12 years. No major professional series have raced at TWS since the 1990s.