Bourdais, who co-drove with Renger van der Zande to victory in the other IMSA WeatherTech SportsCar Championship street course race this season, will aim to best the Grand Touring Prototype (GTP) competition in the 100-minute race Saturday in the shadow of GM’s world headquarters. Reigning GTP champion Pipo Derani, who had qualified on the pole in three of the four races, was running fifth in the 15-minute session when the No. 31 Whelen Cadillac V-Series.R make right-rear contact with the concrete barrier in Turn 5, slid across the track and made light nose assembly contact with the barrier to cause a red flag with 2:30 left in the session. Derani lost his two fastest laps and will start 10th. A 20-minute practice session precedes the 3 p.m. ET green flag. The No. 6 Porsche 963 earned the pole with a lap of 1:05.390. Cadillac won four of the five races and placed second in the other in 2017-2022 at Detroit (the 2.3-mile street circuit on nearby Belle Isle) since joining IMSA prototype competition in 2017. There was no race in 2020 because of the pandemic and the GTP did not compete at Detroit in 2023. Van der Zande co-drove to victory in 2022 and 2021 with Cadillac Racing. |