The 1966 United States Grand Prix was a Formula One motor race held on October 2, 1966, at the Watkins Glen Grand Prix Race Course in Watkins Glen, New York. It was race 8 of 9 in both the 1966 World Championship of Drivers and the 1966 International Cup for Formula One Manufacturers. The race was the ninth United States Grand Prix (16th including the American Grand Prize races of 1908–16). It was the sixth to be held at Watkins Glen. The race was held over 108 laps of the 3.78-kilometre circuit for a total race distance of 408 kilometres.
The race was won by British driver Jim Clark driving a Lotus 43 for Team Lotus. Clark lapped the field to claim his 20th World Championship win by over a lap. The podium places were filled by Cooper Car Company team mates; Austrian driver Jochen Rindt and British driver John Surtees in their Cooper T81s.
While none of the Brabhams finished, the engine failure of Lorenzo Bandini's Ferrari 312 saw that the Anglo-Australian team could not be caught in the race for the Constructors' championship with only the Mexican Grand Prix. This gave Jack Brabham a unique double, World Drivers' and Constructors' championships in a car of his own make.
Summary
With most of the teams struggling to come to grips with the new 3-liter formula in 1966, Jack Brabham won the World Championship with a neat, simple and lightweight chassis, the Brabham BT19. It was the Australian's third Drivers' title, and the first by a driver in a car of his own manufacture. But it was Jim Clark's Lotus, with the powerful, normally unreliable, BRM H16 engine, that crossed the line first at Watkins Glen. Inheriting the lead when Lorenzo Bandini and Brabham retired, Clark finished a full lap ahead of Austrian Jochen Rindt, and recorded the ill-fated H16's only win.
This was the year the Watkins Glen Grand Prix Corporation departed from the traditional starting money system, and instead offered prize money ranging from $20,000 for first to $2,800 for twentieth. The total purse of $102,400 was easily the richest in the World Championship, and the first prize amount was more than the first prizes of all the other races put together. "$100,000 was a magic number at the time," said race director Cameron Argetsinger. "It was a number that spelled 'big league' to American sport fans." The enthusiastic acceptance of this arrangement by the European team managers and owners marked a huge philosophical change for the Grand Prix establishment in how to promote a race meeting.
With the prize money system, finishing was doubly important and Clark intended to use the more reliable two-liter Climax engine until he discovered how quick the H16 could be. Bandini's Ferrari was the first to break the 120-mph barrier at The Glen, as he posted a time of 1:08.67. John Surtees, now in a Cooper after leaving the Ferrari team in mid-season, and Graham Hill were the only other drivers under 1:09 on Friday.
In the closing minutes of Saturday's session, Brabham grabbed the pole at 1:08.42, and Clark joined him on the front row with a 1:08.53. Immediately after recording his best time, Clark heard a thud behind his back, and when he stopped in the pits, there was oil dripping from the H16's exhaust. The BRM team offered a much-used spare H16 engine, and the Lotus mechanics worked into the night fitting it into Clark's race car.
Sunday was cool, but dry, and a crowd of 75,000 included actors James Garner (Pete Aron), Toshirō Mifune (Mr. Yomura) and Jessica Walter (Pat Stoddard), as well as director John Frankenheimer, who were in the final stages of creating the movie Grand Prix. An hour before the start, Clark was still unsure which car to use in the race. He finally chose the Type 43 with BRM's spare H16, and it, too, was leaking oil on the dummy grid before the crew tightened it up and he began his warmup lap. At the flag, Bandini jumped from the second row into the lead, ahead of Clark, Richie Ginther, Brabham, Surtees, Jackie Stewart, Hill and Denny Hulme.