Detroit Grand Prix (IndyCar)
Detroit Grand Prix (IndyCar)
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Detroit Grand Prix (IndyCar)

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Detroit Grand Prix (IndyCar)

The Detroit Grand Prix (currently branded as the Chevrolet Detroit Grand Prix presented by Lear Corporation for sponsorship reasons) is an IndyCar Series race weekend held on a temporary circuit in Detroit, Michigan. The race has been held from 1989 to 2001, 2007 to 2008, 2012 to 2019, and since 2021. Since 2012, the event has been scheduled for the weekend immediately following the Indianapolis 500.

The origins of the event date back to the Formula One Detroit Grand Prix on the Detroit street circuit. The CART series began headlining the event in 1989, and in 1992, the race moved from downtown Detroit to Belle Isle, a park situated on an island in the Detroit River, which is the longest serving venue of the race. The IndyCar Series took over the race beginning in 2007. The race has been supported by Indy Lights and Formula Atlantic and top-level sports car series such as the Trans-Am Series and the ALMS. From 2023, the race returned to the downtown streets around the Renaissance Center using a circuit partially based on the original Detroit street circuit used by Formula One and CART.

Open wheel racing in Detroit dates back to the 1920s to 1950s, when AAA held the Detroit 100 at the Michigan State Fairgrounds Speedway. AAA also held one five-mile (8 km), non-championship race at Grosse Pointe in 1905.

The race dates back to 1982 when it was a Formula One World Championship event held on the Detroit street circuit encompassing the Renaissance Center. The original circuit was 2.493 miles (4.012 km) with seventeen corners and proved to be even slower than Monaco. The rough, demanding course included a railroad track crossing and mimicked Monaco, with a tunnel on the main straight. While officially the Detroit Grand Prix, it was also referred to as the United States Grand Prix East because there were multiple Grand Prix races in the U.S. at the time. By the time of the 1988 race, the FIA, the governing body of Formula One, had declared the street circuit's temporary pits and garages were not up to the required standard. The race was already the least popular Grand Prix on the calendar and after a very difficult 1988 Grand Prix the drivers became outspoken with their dislike of the event.

For 1989, race organizers planned to move the race to a new temporary circuit on Belle Isle, a city park in the Detroit River. Along with the criticism of the downtown circuit, local developers were also planning to begin construction along portions of the course, making it difficult to set up in the coming years. The relocation plan to Belle Isle was immediately met with stiff local opposition, both public and political. Even though the circuit would be temporary, permanent garages and pit facilities would have needed to be constructed, at significant expense, and at the odds of conservation groups. Also against their favor was a budding interest to relocate the United States Grand Prix to Laguna Seca. That track was courting Formula One, having recently completed capital improvements, and having just hosted a highly successful United States motorcycle Grand Prix. Furthermore, an upstart group in Phoenix was also aggressively vying for the race.

In October 1988, the plan to move to Belle Isle was scrapped. Formula One left Detroit permanently, and a short time later, it was officially announced that the U.S. Grand Prix was moving to Phoenix.

It was in Detroit in 1983 that Italian driver Michele Alboreto drove his Tyrrell 011 to victory in the US Grand Prix East in what would prove to be the 155th and last ever F1 win by the Cosworth DFV V8 engine.

For 1989, the race in Detroit was replaced by a CART series event. Instead of moving to Belle Isle, CART utilized a slightly modified version of the existing downtown Renaissance Center street circuit. The chicane on the main straight was eliminated – something the F1 drivers had been calling for since the first race in 1982. The CART race was held on this 2.52-mile (4.06 km) layout for three years. As had been the case in the event's Formula One days, competitors and fans continued to pan the course, criticizing it for its bumpiness, poor visibility and overall poor layout.

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