782. From 1978, March concentrated on Formula Two, running the works BMW team. A 781 chassis was occasionally campaigned in the minor Aurora F1 series. March also assisted in the production of the Group 4 and Group 5, racing versions of the BMW M1 sports car, which as well as running in mainstream endurance races also ran in the one-make Procar series as supporting events in many F1 races. The F2 cars of this era, particularly the 782, were often superb, and March regained its dominance of the formula - Bruno Giacomelli took the F2 title. Ground effects came to F2 in 1979 but were widely misunderstood; for a while it looked like Rad Dougall in the Toleman team's conventional 782 would beat not only Brian Henton in Toleman's own car but also March's new 792 to the title. In the end, however, Marc Surer prevailed for the works. 1980s In 1981 March made a half-hearted and ill-financed effort to return to F1, building cars that were little more than heavy and insufficiently stiff copies of the Williams FW07 for Mick Ralph and John McDonald's RAM Racing. The car was driven initially by Eliseo Salazar, but he soon quit for Derek Daly to take over. The team acquired a major sponsorship deal from Rothmans in 1982, but the money came too late for Herd or Adrian Reynard (who was working as chief engineer) to improve the performance of the cars. In 1983, McDonald started building his own cars and March was left outside F1 once more. The RAM-March effort was at armslength from March proper, with the cars being built at a separate factory and the only real link with March being Robin Herd. During this phase, March Engines (a separate company within the group) undertook a number of bespoke customer projects - a highly modified BMW M1 (which was highly unsuccessful but provided some input into the later GTP/Group C cars) and an equally unsuccessful Indycar (the Orbitor) based around the 792 chassis. March's attention in the early 1980s was mainly split between F2 and breaking into the IndyCar market. It is a curious irony that although March's FW07 copy bombed in Formula One, when developed into the 81C Indycar it was instantly successful (largely down to George Bignotti's direct involvement in developing the car). Cosworth-powered Marches won the Indianapolis 500 five straight times between 1983 and 1987. The