October 5, 2022

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BMW LMDh To Use V8 From DTM But Turbocharged

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BMW has been restricted-lipped about the Le Mans Daytona hybrid prototype, only saying it would use a V8 engine of unidentified origins. Thankfully, some preliminary specifics have now emerged just after Sportscar365 interviewed Ulrich Schulz, BMW Motorsport’s chief drivetrain engineer. Originally, the LMDh was meant to get a compact 4-cylinder motor derived from DTM, but that turned out to be far too fragile for a demanding stamina race.

Right after that, a nearer consideration was offered to the P63/1 engine from the M8 GTE, but that was no excellent possibly as the engineers uncovered it way too bulky. Because of its fat and sizing, it would’ve been tricky to install the motorsport variant of the S63 engine inside of BMW’s flagship race car. It was just far too lengthy to satisfy the utmost engine duration of 640 millimeters (25.2 inches).

The motor by itself weighed somewhere around 180 kilograms (just about 400 lbs), which is by now the minimum fat for each FIA restrictions. Radiators, auxiliaries, and the other necessary components would’ve pushed it to about 230 kg (just more than 500 lbs). Then there was also the situation with some of the engine components getting taken from a production car or truck, which would’ve meant acquiring to redesign them to support the abuse that goes with the territory in an stamina race.

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With the two engines out of the equation, BMW Motorsport then shifted concentrate towards the P66 released a decade in the past. The normally aspirated 4.-liter created its debut on the E92-generation M3 DTM and progressed into the P66/1 to conform to 2017 DTM laws. They at first wished to bump its displacement to 5 liters in a bid to extract additional ability, but that would’ve necessary a good deal of progress.

Finally, a option was uncovered – pressured induction. Dubbed P66/2, the developmental engine was designed and went on to evolve into the P66/3 when it was analyzed on a dyno back in March. BMW is at this time busy installing the turbocharged V8 into the LMDh in Varano at chassis supplier Dallara. The to start with actual check is scheduled for August forward of the racing debut established for January 2023 in Daytona.

Resource: Sportscar365

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