BMW's LMDh racer pairs a DTM V-8 with turbos and a hybrid system

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BMW's LMDh racer pairs a DTM V-8 with turbos and a hybrid system
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The V-8 in BMW's new LMDh race car originally powered an M4 DTM racer in the previous decade.

race car set to compete from next year in the new GTP class of the IMSA SportsCar Championship. GTP replaces IMSA's current DPi class as the new top class, and is open to both LMDh cars as well as LMH cars.

The V-8, code-named P66/3, is based on the 4.0-liter V-8 used in BMW's former DTM racing program, specifically in the M4 DTM race car that competed in the 2017 and 2018 seasons. Time and cost restraints ruled out a new engine being developed from scratch, and the DTM engine was finally settled on because it was deemed as the best fit for the requirements of the LMDh regulations. BMW also looked at a 4-cylinder engine used in DTM and a twin-turbocharged 4.

As for the electric motor forming the hybrid system, it was developed using lessons learned from BMW's Formula E program. The hybrid system consists of the electric motor, an inverter and high-voltage battery. The electric motor is mated with the V-8, with a separator clutch enabling the car to drive on electric power alone, which could be used in the pit lane, for example.

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