F1 1958 Connaught B Dart

In 1950, the first single-seaters, the Formula 2 "A" types, used an engine that was developed by Connaught from the Lea-Francis engine used in their "L" type sports cars. The engine was extensively re-engineered and therefore is truly a Connaught engine. The cars were of conventional construction for the time with drive through a preselector gearbox to a de Dion rear axle. In 1952 and 1953, the races counting towards the World Championship were to Formula 2 rules so drivers of these cars could take part in those events as the table below shows.

Connaught designed a new car for the 2½ litre Formula 1 of 1954 which was to have a rear-mounted Coventry Climax V8 engine (the "Godiva"), but when the engine was not proceeded with, a conventionally arranged "B" type was designed using an Alta engine developed into 2½ litre form. The first cars were built with all-enveloping aerodynamic bodywork but later rebodied conventionally (as the photos below show). In 1955, driving a Connaught in this form, Tony Brooks scored the first win in a Grand Prix by a British driver in a British car since 1923, in a non World Championship race at Syracuse. Thereafter the "B" type has been known as the "Syracuse" Connaught and the name was used for the car presented in the 2004 revival

In 1962, Jack Fairman attempted to qualify for the Indianapolis 500 in a Connaught race car, but failed to find the necessary speed to make the field.