Dee ihe na-esote paragraf a - FIA nyere iwu site na 1966, iwu ọhụrụ nke 3-liter engine ga-abanye n'ike. Lotus adịghị asọmpi. Malite na 2 lita Coventry-Climax engine na Lotus 33, Clark enwetaghị akara ruo mgbe British Grand Prix
na ebe nke atọ na Dutch Grand Prix na-esote. Site na Grand Prix nke Italy gaa n'ihu Lotus jiri igwe BRM H16 dị mgbagwoju anya na ụgbọ ala Lotus 43, nke Clark ji merie US Grand Prix. O jikwa ebe nke abụọ ọzọ n'Indianapolis 500, oge a n'azụ Graham Hill.