C Sports Racer is a class in the Sports Car Club of America

Sports Car Club of America

The Sports Car Club of America is a club and sanctioning body supporting road racing, rallying, and autocross in the United States. Formed in 1944, it runs many programs for both amateur and professional racers.-History:...

. it consists of open top prototype style cars weighing at least 1200 lbs with a Maximum engine displacement is restricted to 1615cc, or a 800cc to 1300cc Motor Bike Engine and a weight of 1200cc. Superchargers and Turbochargers are allowed but then the engine displacement is restricted to 765cc. Some CSRs are Formula Atlantic

Formula Atlantic

Formula Atlantic is a specification of open wheel racing car developed in the 1970s. It was used in professional racing through the IMSA Atlantic Championship until 2009 and is currently primarily used in amateur racing through Sports Car Club of America Formula Atlantic.-History:The history of...

cars converted by adding bodywork to the chassis.