High Quality Content by WIKIPEDIA articles! The 1966 World Sportscar Championship season was the 14th season of the FIA "World Sportscar Championship" motor racing. It featured the 1966 International Manufacturers` Championship and the 1966 International Sports Car Championship, which were contested between February 5, 1966 and September 11, 1966, over a total of thirteen races. The International Manufacturers` Championship was open to Group 6 Sports-Protoypes and was contested in two engine capacity divisions, P1 (Up to 2000cc) and P2 (Over 2000cc). The International Sports Car Championship was open to Group 4 Sports Cars and was contested in three engine capacity divisions, S1 (Up to 1300cc), S2 (1301 to 2000cc) and S3 (Over 2000cc).