September 7, 2024Â CST
Venue:
Jefferson Speedway
W8135 US-18,
Cambridge, WI 53523
Season Champs and Alumni – Late Model, Sportsman, Hobby Stock, International
Jefferson Late models are tube chassis race cars purposefully built for infinite adjustability to gain maximum grip on the racing surface. The average Late Model weighs 2800lbs and utilizes an engine producing in the neighborhood of 450 Horsepower. The engines have a maximum displacement rule of 362 cubic inches, are limited to a 10.8:1 compression ratio, and use a Holley 2 barrel carburetor. This engine configuration has proven economical to build, reliable to operate, and provides the best balance for the 8 inch American Racer 870 tires that have been adopted for use during the 2015 racing season. With an approximate field of 30 teams and drivers, and each car qualifying within .5 seconds of the others, Jefferson Late Models provide the closest and most fierce racing competition in the Midwest!
The Sportsman class car is an eight-cylinder stock car based on stock production compact cars. The class consists of any 1960 or newer American made passenger cars. All cars have been modified for driver protection (roll cage, racing seat and belts, fuel cell, etc.). The chassis is predominately stock. The engines are limited to 362 cubic inches, flat top pistons, stock heads, and limited cam lift. These cars compete on the American Racer 870 tire. Sportsman cars are the quickest division after the Late Models with the fastest times hovering around 15 seconds on the quarter mile. This class has proven to be popular with those seeking to learn how to set up a car so as to advance into the Late Model division.
The Hobby Stock car is an eight-cylinder stock car based on stock production cars. All cars have been modified for driver protections (roll a cage, racing seat and belts, fuel cells, etc.) The chassis is absolutely stock. The engines are limited to 362 cubic inches and 9.3 to one compression. This division competes on takeoff American Racer take off racing tires. The racing is extraordinarily competitive and a few of these drivers have progressed to the more sophisticated divisions.
An International class car consists of any 1985-2013 foreign or domestic compact car with a four cylinder engine and front wheel drive. Rear wheel drive cars are allowed, starting with the 2018 season. All cars have been modified for driver protection (roll cage, racing seat and belts, fuel cell, etc.). The chassis and engines are predominately stock. This class competes predominantly on the Hoosier racing tires. This class has proven economical to build and has provided some of the wildest racing at the speedway.
