Quote:
Originally Posted by 123Britt
Thinking that Joe's gut feeling about the M240i B58 engine can be explained by the B58 being an undersquare / longer stroke engine than the N55 which is slightly oversquare / larger bore. Therefore, the peak torque of the B58 is made at a lower engine speed. Throw in improved cooling and the differences are what Joe describes. Also explains the need for the forged crank & rods.
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However, I wonder how the B58 will compare in maintenance cost and long term ownership:
(2) WATERPUMPS VS (1) FOR EXAMPLE.
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B58 looks great from a performance perspective. But from a maintenance perspective, long term, looks like a nightmare. Pure speculation at this point, but just look at the oil filter placement :/
And doesn't the N55 in the m235 have a forged bottom end? I remember reading an article/press release that supported this. The same one where they confirmed that the m235 was faster than the 1M around the track.. I'll try to find it.
Found it:
http://www.2addicts.com/forums/showt...9#post15275019