Question: Which single seater auto-racing formula did 1977 Can-Am season series used
Related documents: [0]  [DOC] Formula 5000 (or F5000) was an open wheel, single seater auto-racing formula that ran in different series in various regions around the world from 1968 to 1982. It was originally intended as a low-cost series aimed at open-wheel racing cars that no longer fit into any particular formula. The '5000' denomination comes from the maximum 5.0 litre engine capacity allowed in the cars, although many cars ran with smaller engines. Manufacturers included McLaren, Eagle, March, Lola, Lotus, Elfin, Matich and Chevron. [END] 
[1]  [DOC] The 1977 Can Am season was the tenth running of the Sports Car Club of America's prototype-based series. Despite the revived name, however, the new series was entirely unrelated to the previous series which had folded in 1974. This series used Formula 5000 Lola T332s with fenders added. Patrick Tambay was declared champion, winning six of the nine races that year for Carl Haas. While Lola chassis dominated the series, a Chevrolet powered Schkee DB1 driven by Tom Klausler won the first race at Mont Tremblant. Formula One driver Gilles Villeneuve came in third at Road America in a Wolf. While Chevrolet was not the only engine supplier, they swept the entire season. This season also marked a resurgence of interest in SCCA events, with Can Am accompanying F5000 and the Trans Am Series seeing a mild resurgence in the eighties. [END] 
Answer: 
Formula 5000
Formula 5000