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NASCAR engine bay. 1987 Ford Thunderbird ... 1994 was the final year that V6 engines were used in the Busch ... The restrictor plate limits air into the engine ...
Print/export Download as PDF ... 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.
Artist rendering of a NASCAR restrictor plate. A restrictor plate or air restrictor is a device installed at the intake of an engine to limit its power. This kind of system is occasionally used in road vehicles (e.g., motorcycles) for insurance purposes, but mainly in automobile racing, to limit top speed to provide equal level of competition, and to lower costs; insurance purposes have also ...
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.
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 ...
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.
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).