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Ford NASCAR engine. NASCAR engine bay. 1987 Ford Thunderbird stock car engine. Chevrolet NASCAR V-8 motor. Ford V-8 stock car engine. NASCAR, the highest governing body and top level division for stock car racing in the United States, has used a range of different types of engine configurations and displacements since its inaugural season in 1949.
Toggle the table of contents. ... there are random races per year where NASCAR confiscates vehicles ... The restrictor plate limits air into the engine, reducing ...
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.
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.
Pearson took advantage of the NASCAR engine and weight rules for 1968 and used a 396 cid engine instead of the normal 427. At that time the car had to be 4,000 pounds with the 427 cid engine but only 3,707 pounds with the 396 cid engine. The lighter weight paid off as Pearson used less fuel and had fewer tire troubles than many of the other teams.
NASCAR eventually adopted a restrictor plate to limit top speeds for the 7.0L engine as teams switched to small-block 358 cu in (5.9 L) engines. NASCAR edited the rules in a way that they hoped would make the cars safer and more equal, so the race series would be more a test of the drivers, rather than a test of car technology. [21]
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).
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 ...