Group CN is a category of motorsport, introduced by the FIA in the early nineties for sports car racing. Group CN cars are mainly seen in hillclimbing championships or sports racing series. Group CM is a non-FIA class which is closely related to Group CN.
Major racing series
Group CN rules are applied to a variety of championships. Many championships alter the rules in their own way like the Radical European Masters and V de V championships.
Radical European Masters
V de V
The French based V de V organisation features two FFSA Group CN based classes. The endurance championship is open for any chassis and engine within the regulations. The V de V organisation also features the Funyo Challenge open to Peugeot powered Funyo 4 or Funyo 5.
FIA Group CN technical regulations
|Engine||Maximum of 6 cylinders and
3000cc, homologated by the FIA in Group N.
|Drivetrain||Free, with a maximum of 6
forward ratios. Reverse gear is compulsory.
|Maximum dimensions||Length: 4800mm|
|Front plus rear overhangs not to exceed 80% of the wheelbase.|
|Difference between front and rear overhangs not to exceed 15% of the wheelbase.|
|Bodywork||Open or closed cockpit|
|Rear wing||Maximum of 2 elements, which must fit within a 150x400mm cross section. Maximum span of 1800mm|
|Weight||Related to engine capacity|
|Up to 1000cc: 475kg|
|1000cc - 1300cc: 495kg|
|1300cc - 1600cc: 515kg|
|1600cc - 2000cc: 535kg|
|2000cc - 2500cc: 575kg|
|2500cc - 3000cc: 625kg|
- Technical Regulations for Production Sports Cars (PDF). FIA Sport / Technical Department. 2011. pp. 1–19.