C Sports Racer

Steve Forrer racing to his CSR win at the 2013 SCCA National Championship Runoffs

C Sports Racer (CSR) is a class in the Sports Car Club of America. it consists of open top prototype style cars weighing at least 1200 lbs with a Maximum engine displacement is restricted to 1615cc, or an 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 cars converted by adding bodywork to the chassis.[1]

References

Wikimedia Commons has media related to C Sports Racing.