The track was a part of the championship for every season of the IMSA SportsCar Championship since its inception in 2014, except for 2020 due to the COVID-19 pandemic. The Raceway on Belle Isle was also dropped from the calendar as a result of the Belle Isle circuit being replaced in favor of the Detroit street circuit.The event was replaced with a sprint race at Indianapolis Motor Speedway, marking IMS' return to the championship for the first time since the series' inaugural season in 2014. The track had been a part of the championship since 2018. Mid-Ohio Sports Car Course was dropped from the calendar.

Race is part of the WeatherTech Sprint Cup Rnd. The only difference was that there would be no Sprint Cup-only rounds for 2023, to combat situations such as the record-low six-car GTD entry at the 2022 Chevrolet Grand Prix. Īfter initially announcing discontinuing the sub-championship entirely on August 5, IMSA later declared on September 1 that they would continue the WeatherTech Sprint Cup, a championship comprising only sprint rounds for the GT Daytona (GTD) class. A collaborative alliance between IMSA and the French racing organizers, ACO, resulted in the convergence of the two organizers' top-class regulations. The GTP class consists of the same framework as the Hypercar class of the FIA World Endurance Championship. As with the DPi class, GTP is regulated by a Balance of Performance (BoP) system to keep the performance range of each of the cars close together and regulate spending.

The LMH regulation allows bespoke hybrid designs and offers more mechanical design freedom in exchange for elevated development costs. LMDh allows choosing from a base chassis, of which there are four choices, from Dallara, Ligier, Multimatic, and Oreca, as well as a specification hybrid system on all cars, with freedom on aerodynamics, bodywork, and engine configuration.

GTP is the new flagship class of the championship and consists of two sister technical regulations: LMDh (Le Mans Daytona h), and LMH ( Le Mans Hypercar). IMSA replaced it with a new class called GTP, named in tribute to the GTP class from the IMSA GT Championship in the 1980s. It complies with the LMDh regulations.Īt the end of the 2022 season, IMSA retired the Daytona Prototype International (DPi) class, which was the premier racing class in the WeatherTech Championship from 2017 until 2022, spanning six seasons. The Porsche 963 (pictured at the 2022 Goodwood Festival of Speed) is one of the prototype race cars that are allowed to compete under IMSA’s new GTP class.

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