The Cars
NASCAR Whelen Modified Tour cars are substantially different from their Sprint Cup counterparts. Today's cars are based on tubular chassis built by fabricators such as Troyer Engineering, Chassis Dynamics, Spafco, and Raceworks. Bodies are related to their passenger car counterparts in only two ways. There is a "manufacturers" logo placed on the car, and a logo indicating the type of road car it is alleged to be. Neither logo, is actually associated with the actual manufacturer of the race vehicle. Largely fabricated from sheetmetal, with the front wheels and much of the front suspension exposed. A NASCAR Modified is eleven inches shorter in height and over twenty-three inches wider than a Cup car. By rule, Tour-type Modifieds weigh at least 2610 pounds (with additional weight for engines 358 cubic inches and larger) and have a wheelbase of 107 inches (2,700 mm). They are powered by small-block V-8 engines, usually of 355 to 368 cubic inches displacement, although larger or smaller engines can be used. Engine components are largely similar to those used in the Sprint Cup Series, but Whelen Modified Tour engines use a small four-barrel carburetor (rated at 390 cubic feet per minute, about half the airflow of previous Modified carburetors), which limits their output to 625 to 700 horsepower. On large tracks such as New Hampshire Motor Speedway, the engines must have a restrictor plate between the carburetor and intake manifold, reducing engine power and car speed for safety reasons. Approved "body styles" for 2006 include the Chevrolet Cavalier and Monte Carlo, the Dodge Avenger and Stealth, the Ford Mustang and Escort, the Plymouth Laser and Sundance, and the Pontiac Sunbird, J2000, and Grand Prix.
Read more about this topic: Whelen Modified Tour
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