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A NASCAR Cup Series engine with the maximum bore of 4.185 inches (106 millimeters) and stroke of 3.25 inches (83 millimeters) at 9,000 rpm has a mean piston speed of 80.44 fps (24.75 m/s). Contemporary Cup engines run 9,800 rpm, 87.59 fps (26.95 m/s), at the road course events, on Pocono Raceway 's long front stretch, and at Martinsville ...
[5] [6] Contemporary NASCAR-spec top-level cars produce maximum power outputs of 860–900 hp [7] [8] from their naturally aspirated V8 engines. In October 2007 American race car driver Russ Wicks set a speed record for stock cars in a 2007-season Dodge Charger built to NASCAR specifications by achieving a maximum speed of 244.9 mph (394.1 km/h ...
At racing speeds approaching 200 miles per hour, a modern NASCAR race car can generate enough lift to get airborne if it spins sideways. To keep cars firmly planted, roof flaps were required in 1994. [3] 1994 was also the final year that V6 engines were used in the Busch Series, as many short track series had abandoned six-cylinder engines.
The Petty team was penalized 104 points and fined $35,000 for the rule violations involving the tires and engine. [4] [5] The engine was determined to be 381.983 cubic inches (6,259.58 cc), [4] [5] well over the specifications in the NASCAR rulebook for 1983 which stipulated a maximum of 358 cubic inches (5,870 cc).
One popular idea was to use 231–275 cu in (3.8–4.5 L) six-cylinder engines; instead of Cup Series' 358 cu in (5.9 L) V-8s. [5] [6] [7] In 1989, NASCAR changed rules requiring cars to use current body styles, similar to the Cup cars. However, the cars still used V6 engines. The cars gradually became similar to Cup cars.
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Highest top speed (forced induction petrol engine) – Bugatti Chiron Super Sport 300+ – 490.48 km/h (304.77 mph) [56] Highest top speed (naturally aspirated engine) – McLaren F1 – 355–386 km/h (221–240 mph) Highest top speed (forced induction diesel engine) – BMW Alpina D5 S – 286 km/h (178 mph) [57] [58]
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