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The IMSA SportsCar Championship, currently known as the IMSA WeatherTech SportsCar Championship under sponsorship, is a sports car racing series based in the United States and Canada and organized by the International Motor Sports Association (IMSA). It is considered the pinnacle of sports car racing in North America, attracting top-tier ...
In 2022, the GTLM class in the IMSA SportsCar Championship was replaced by the GT Daytona Pro (GTD Pro) class using GT3 machinery. As Corvette did not have any GT3 cars on the market (with the Chevrolet Corvette Z06 GT3.R not debuting until 2024), the C8.R was allowed to run in the GTD Pro class using a GTD kit.
The Chevrolet Corvette Z06 GT3.R is a GT racing car designed and built by Pratt Miller Engineering and Chevrolet to primarily compete in the LMGT3 (Le Mans GT3) and GTD & GTD Pro (Grand Touring Daytona) in the FIA World Endurance Championship and IMSA SportsCar Championship, respectively.
In the GTD Pro and GTD classes, the BMW received a 6.7 horsepower reduction, whilst the Ford lost 8.8 horsepower with a 1 millimeter smaller air restrictor. Furthermore, the Acura received a loss in power of 11.4 horsepower. Finally, the Mercedes saw a power boost of 6.7 horsepower, whilst the air restrictor will be opened up by 0.5 millimeters ...
Ahead of the event, IMSA published a bulletin regarding the latest balance of performance (BoP) changes in the GTD Pro and GTD classes. [3] The Acura was given a 1-liter increase in fuel capacity to accommodate the 11.5 horsepower gained across all power levels.
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The 2025 IMSA SportsCar Championship (known for sponsorship reasons as the 2025 IMSA WeatherTech SportsCar Championship) is an ongoing motor racing championship and the 55th racing season sanctioned by the International Motor Sports Association, which traces its lineage back to the 1971 IMSA GT Championship.
IMSA altered the balance of performance to try to create parity within the GTLM and GTD categories. The BMW M6 GTLM's refuelling hose restrictor was increased by 1 mm (0.039 in). The Ferrari 488 GTE and Ford GT's refuelling hose restrictor was shortened by 0.5 mm (0.020 in).