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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 ...
This is the largest carburetor restrictor plate opening since the one inch (25.400 mm) mandate in 1988, the first year the horsepower-reducing plates were used in the Cup Series at Daytona. [18] Unfortunately, the restrictor plates have an unintended effect on the race. Because of the reduced horsepower of the cars, the cars form large packs.
The restrictor plates that NASCAR mandated in the engines prevented cars from pulling away from each other and created pack racing. Pack racing created crashes that included more cars.
The first win of a restrictor plate race during the fuel injection era would go to Matt Kenseth. [20] However, Kenseth simply could not keep the consistency to win any other restrictor plate race during the current fuel injection era. Roger Penske would become the first person to win the owner's championship while fielding cars with fuel injection.
As NASCAR is choking down horsepower on cars throughout the Cup Series through tapered spacers in 2019, the series doesn't need to use plates at Daytona and Talladega any longer. 2019 Daytona 500 ...
The stars of the NASCAR Cup Series will once more descend on the birthplace of NASCAR for the 67th annual Daytona 500 on Sunday. ... Since the restrictor plates bunched up the field at Daytona and ...
The injection system used by NASCAR is a different system from that used in IndyCar Racing and other motorsports series; the EFI system that NASCAR put into use was compatible with the old restrictor plates, allowing NASCAR to continue to use them to keep the speeds lower at the superspeedways and save costs for race teams. The restrictor ...
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