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      01-24-2013, 04:53 PM   #105
BMW269
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Quote:
Originally Posted by Uli_HH View Post
If the M3/M4 really gets an I6 engine, this be 100% for sure an member of the B68 family ... and if you unterstand the B68 simply as two B38 put together back to front, than you see that 450hp are posible, because the B38 in i8 form produces 226hp.

I see no chance that BMW/M-GmbH develops two different I6 engines ... and an "S68" based on the B68 would never reach 8.000rpm redline ... but there is an small possibility that two B38 blocks could also put together in V-form to use an S63Tü style turbo-system.
I'm not an expert in engine building. We use a relatively simple way of describing derivatives, like for example "the S65 is a S85 with two cylinders chopped off". It is not that simple as it sounds.

But what you say about two 3-cylinder put in V is quite possible. There were those engine specs of 3.2l I6 and 3.0l V6. We thought the V6 displacement was wrong because it would rather have been 3.3l, then we came to the conclussion that it could be based off the S65, the as you say, 1.5l I3 226 PS(B38) + 1.5l I3 226 PS (B38) = 3.0l V6 452 PS (B68) sounds just like it. Having seen the acceleration and sound vid of the 3 cylinder 1 series, it was amazingly fast. This could really be the engine. It means it would be lighter than a 3.3l V6 based on the S63.

The M3/M4 is the greatest engine enigma in car history.
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