BMW's return to sportscar racing couldn't have any old V8 ⚡️ here's how the 640hp P66/3 came to be.
Back when DTM was using properly exotic race cars unique to the series , BMW’s M4 DTM was using a ‘P66’ V8. It was a naturally aspirated 4.0-litre 90-degree unit, making peak power at 7,500rpm; for 2017 and 2018 it produced more than 500hp and was known as the P66/1 - that’s the engine that’s been used to build the M Hybrid’s V8.
There’s plenty more to recommend the V8 than merely being light and tough, too. “It is a huge plus that we were able to make use of existing materials such as steel and aluminium from BMW’s time in Formula 1 for the basis of the engine, as well as for individual components – like shafts, housing and small parts” said Ulrich Schulz, Head of Drivetrain Design at BMW M Motorsport. Interesting that BMW’s time in F1 can still have an influence.
And that seems like the easy bit, in truth, with the P66 requiring its injection system to be rebuilt for direct injection, having its block and head recast and then the pair of turbos fitted. “Converting the normally-aspirated P66/1 engine into a bi-turbo and then working with the electric drivetrain colleagues to turn it into a hybrid drive system was very complex” said Schulz, presumably underselling the challenge somewhat.
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