The 1983 Detroit Grand Prix was a Formula One motor race held on June 5, 1983, in Detroit, Michigan. Summary Circuit changes The circuit had been slightly modified from its original configuration the year before, with the pit lane extended to place the entrance before the final chicane, and a short new section of track eliminating the extremely tight hairpin at Turn Five. The new layout was faster and much preferred by the drivers. Friday's entire agenda was run in the rain, however, and it was left to a single hour on Saturday to decide the starting grid. Qualifying Contrary to the usual pattern, after the first fifteen minutes or so of qualifying, the track became slower as more rubber was laid down. This was apparently due to moisture still in the track being drawn out by the now-present sunshine. The pole-winning time of 1:44.734 was posted by René Arnoux on his Ferrari's first set of qualifying tires; on his second set, he was more than two seconds slower. Many who did not record a quick time early in the session were caught out by the changing conditions, and the grid held many surprises as a result. Defending Champion Keke Rosberg was twelfth, Alain Prost thirteenth and Niki Lauda eighteenth, while the non-turbocharged cars of Marc Surer and Alboreto were fifth and sixth. American Eddie Cheever, in the only competitive ride of his F1 career with Renault, was in seventh spot, six places ahead of his highly-regarded teammate. Race Over 70,000 fans enjoyed beautiful weather for the race on Sunday. The boats on the Detroit River, the blaring music and the floods of people from the downtown hotels created quite an atmosphere, inevitably bringing comparisons to Monaco, as the Long Beach event often did. The first attempt at a start was halted just as the green light was about to come on, when Andrea de Cesaris signalled from the grid that his Alfa Romeo had stalled. The whole process was begun again, with another pace lap that reduced the race distance from 61 laps to 60, and this time the green light came on. This time, however, Patrick Tambay's Ferrari, in the second row, stalled on the grid. He held his breath while everyone made their way safely around him, and then, expecting a push-start, instead was removed from the circuit by tow truck. Piquet made an excellent start and