LMDh

LMDh (Le Mans Daytona h)[1] is a set of sports prototype regulations used alongside Le Mans Hypercar (LMH) in both the Grand Touring Prototype (GTP) class of the IMSA SportsCar Championship and the Hypercar class of the FIA World Endurance Championship.

[2][3] The LMDh ruleset was created jointly by the International Motor Sports Association (IMSA) and the Automobile Club de l'Ouest (ACO).

[11] A further meeting held in late June saw a 400-volt system, providing in the range of 70-90 kW (90-120 hp) of electric power emerge as the leading electrification option.

[14] On July 31, 2019, FIA World Endurance Championship CEO Gerard Neveu revealed that an active effort was underway between the ACO and IMSA technical departments to seek similar performance targets between Hypercar and DPi 2.0, which would allow for both platforms to eventually crossover and compete head to head.

It was planned to first be introduced in Europe starting from September 2021, before having its North American debut in 2022 at the 2022 Rolex 24 at Daytona.

[23] The draft regulations stated that a car weight of 1030 kg, 500 kW peak of combined power from engine and hybrid system, a single bodywork package, a single tyre supplier, alongside a global Balance of Performance system to balance out LMDh and LMH cars.