1987 United States Grand Prix East

Infobox Grand Prix race report
Type = F1
Country = United States
Grand Prix = United States
GP_Suffix = East
Official name = 6th United States Grand Prix East
Date = June 21
Year = 1987
Race_No = 5
Season_No = 16
Location = Detroit street circuit
Detroit, Michigan
Course = Temporary street course
Course_mi = 2.5
Course_km = 4.023
Distance_laps = 63
Distance_mi = 157.5
Distance_km = 253.449
Weather = Clearing, then showers
Pole_Driver = flagicon|UK Nigel Mansell
Pole_Team = Williams-Honda
Pole_Time = 1:39.264
Fast_Driver = flagicon|Brazil Ayrton Senna
Fast_Team = Lotus-Honda
Fast_Time = 1:40.464
Fast_L

First_Driver = flagicon|Brazil Ayrton Senna
First_Team = Lotus-Honda
Second_Driver = flagicon|Brazil Nelson Piquet
Second_Team = Williams-Honda
Third_Driver = flagicon|France Alain Prost
Third_Team = McLaren-Porsche

The 1987 United States Grand Prix East was a Formula One race held on June 21, 1987 in Detroit, Michigan. This event was also referred to as the Detroit Grand Prix.

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ummary

Ayrton Senna repeated his 1986 win in Detroit and won his second 1987 race in a row, the first wins for a car with active suspension. The win in Monaco three weeks before had proven that Lotus' new system worked, and on the bumpy Detroit circuit, it was even more of an advantage. Superior tire wear allowed Senna to run the entire race without stopping, and he came home over half a minute ahead of the Williams of eventual Driver's Champion Nelson Piquet.

"Normally, the Detroit race was immediately preceded or followed by the Canadian Grand Prix. In 1987, however, FISA had demanded improvements to the circuit in Montreal, including new pits. When it was determined that these changes could not be completed in time, the race was cancelled, and there would be no Canadian race for only the second time since 1967."

On Friday, Nigel Mansell's Williams was fastest in both qualifying sessions, ahead of Senna'sLotus and Piquet, in the second Williams. It rained on Friday night, but the track was dry for the afternoon session on Saturday. In the final session, Senna briefly took the top spot, but Mansell took it right back and ended up almost a second quicker for his fourth pole in five races on the season. American Eddie Cheever was sixth for Arrows, just behind Alain Prost's McLaren.

It rained again on Saturday night and Sunday morning, but, after a soaked warmup on race morning, the start was dry. The first three got away from the grid in order, while Cheever jumped up to fourth and Teo Fabi went from eighth to fifth in the Benetton, followed by Michele Alboreto, Prost, Thierry Boutsen and Stefan Johansson. On lap three, Piquet went wide in a corner and picked up debris that punctured a tire. His pit stop moved Cheever into third, but justthree laps later, Fabi hit Cheever's rear tire, puncturing it and breaking the nose of Fabi's Benetton. Fabi was out on the spot, while Cheever lost two laps and rejoined in 19th.

By lap 10, Mansell was five seconds ahead of Senna, with Alboreto another 23 seconds back in third. Suddenly, Senna felt his brake pedal go soft entering a turn, and he narrowly avoided hitting the wall. He decided to back off and allow the brakes to cool, dropping three seconds per lap from his times. Primarily concerned about staying ahead of Alboreto, Senna got a break when the Ferrari's gearbox failed on lap 25, handing third place to Prost. On the next lap, Sennabegan to go after Mansell.

On lap 26, Mansell's lead was 18.8 seconds over Senna, but he was beginning to experience cramps in his right leg. A stop for tires on lap 34 took a disastrous 18 seconds when the right rear wheel nut refused to seat properly. Holding the brakes on much longer than normal made the Englishman's cramp even worse. Prost, now in second, was struggling with brake and gearbox problems as he stopped for tires.

"Senna turned the race's fastest lap on lap 39 at 1:40.464, faster than his qualifying time! Realizing that he was faster on his original tires than the others were on new ones, he decided to finish the race without stopping to change tires. When the Lotus crew emerged in the pit lane for a time as if preparing for a stop, it wasn't until lap 50 of the 63 lap race that the rest of the field realized the Brazilian was not coming in. By that time, he was nearly a minute ahead."

Mansell, by this time, was exhausted, his head rolling from side to side in the cockpit. He said after the race that every time he passed the pits, he thought of stopping. On lap 53, Piquet and Prost passed him, and on lap 56, Gerhard Berger did as well. His perseverance gained him two points for fifth, a lap down, while Cheever took the final point.

Senna eased up toward the end, and with just three laps to go, it began to rain lightly. It never became an issue, however, and he crossed the line thirty-three seconds ahead. It was the sixth win of his career, but his last in 1987 and the last for the Lotus team, which eventually folded in 1994. Senna said that his tires were able to last the entire distance for two reasons: the laps he slowed to cool the brakes, and the smooth ride given by the active suspension.

Qualifying

Classification

Notes

*Numbers in brackets refer to positions of normally-aspirated entrants competing for the Jim Clark Trophy.

F1 race report
Name_of_race = United States Grand Prix East
Year_of_race = 1987
Previous_race_in_season = 1987 Monaco Grand Prix
Next_race_in_season = 1987 French Grand Prix
Previous_year's_race = 1986 United States Grand Prix East
Next_year's_race = 1988 United States Grand Prix East

References

* Rob Walker (October, 1987). "6th Detroit Grand Prix: Taking An Active Role". "Road & Track", 131-134.