Originally Posted by Uli_HH
To my infos the M-GmbH change their engine choise from an I6 N54/55 derivative to an V6 based on the M5 S63 V8 simply because an engine based on the N54/55 with the needed 450+ HP doesn´t fullfill the reliability requirements that BMW has to an engine that they are bringing on the Markt.
BMW/M-GmbH is an Manufacturer and no aftermarket tuner!
I'm all open to new ideas from BMW
The truth is that on 91 octane the current N54 I-6 can't exceed 400hp reliably, and this is speaking from reading many of the N54 tech board messages. It can probably do it with bigger turbos, but this would increase lag. Maybe 3 turbos could solve this problem on a 3.0l I-6 ?
A little more displacement is needed for 450hp. 3.3 liters sound about right. The V6 would also provide better sound compared to an inline-6.
I wish the N54 would live on though