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

BMW in June supplied a primary take a look at its new M Hybrid V8 LMDh (Le Mans Daytona hybrid) race automobile set to compete from subsequent yr within the new GTP (Grand Touring Prototype) class of the IMSA SportsCar Championship. GTP replaces IMSA’s present DPi (Daytona Prototype Worldwide) class as the brand new prime class, and is open to each LMDh vehicles in addition to LMH (Le Mans Hypercar) vehicles.

BMW has now adopted up with the primary particulars on the V-8 engine that varieties a part of the hybrid powertrain that may energy its race automobile. The powertrain consists of a twin-turbocharged 4.0-liter V-8 and an electrical motor, and according to LMDh laws the 2 energy sources at anybody time can generate a most output of 670 hp.

The V-8, code-named P66/3, relies on the 4.0-liter V-8 utilized in BMW’s former DTM racing program, particularly within the M4 DTM race automobile that competed within the 2017 and 2018 seasons. Time and value restraints dominated out a brand new engine being developed from scratch, and the DTM engine was lastly settled on as a result of it was deemed as one of the best match for the necessities of the LMDh laws. BMW additionally checked out a 4-cylinder engine utilized in DTM and a twin-turbocharged 4.4-liter V-8 utilized in a GTE program, although these have been dominated out as a result of sturdiness and weight points, respectively.

The P66/3 V-8 maintains the 4.0-liter displacement of the unique DTM engine, however options extra fashionable designs for the cylinder block and heads, in addition to the turbochargers, and a brand new injection system which wanted to be designed for direct injection. The engine banks are 90 levels, and there are 4 valves per cylinder, plus dry-sump lubrication. The engine’s max velocity is 8,200 rpm, and its regulated max output is roughly 640 hp and 479 lb-ft of torque.

2023 BMW M Hybrid V8 LMDh race automobile

2023 BMW M Hybrid V8 LMDh race car

2023 BMW M Hybrid V8 LMDh race automobile

2023 BMW M Hybrid V8 LMDh race car

2023 BMW M Hybrid V8 LMDh race automobile

As for the electrical motor forming the hybrid system, it was developed utilizing classes realized from BMW’s Method E program. The hybrid system consists of the electrical motor, an inverter and high-voltage battery. The electrical motor is mated with the V-8, with a separator clutch enabling the automobile to drive on electrical energy alone, which could possibly be used within the pit lane, for instance.

The entire hybrid powertrain was put in within the automobile and fired up for the primary time on the finish of June. An preliminary shakedown take a look at is scheduled for the tip of July, at a circuit in Varano de Melegari, Italy, and an intensive take a look at program will proceed after that.

The primary race would be the 2023 24 Hours of Daytona subsequent January. The race is the opening spherical of the 2023 IMSA SportsCar Championship. BMW does not plan to compete within the World Endurance Championship, however is predicted to compete within the collection’ spotlight, the 24 Hours of Le Mans.

Acura, Alpine, Audi (possibly), Cadillac and Porsche are additionally dedicated to LMDh, whereas ByKolles, Ferrari, Glickenhaus, Peugeot, and Toyota are all dedicated to LMH. Lamborghini additionally introduced in Might that it’s going to be part of the LMDh fold in 2024.

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