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      09-16-2019, 03:39 PM   #75
lemetier
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Quote:
Originally Posted by mkoesel View Post
Great point - I had forgotten that they changed the bore dimensions of the S58 from the B58 it is based upon. That's a first for a turbocharged M engine, BTW. The S55 and S63 share their bore/stroke with the N55/N63 respectively.

Good catch on the compression ratio, too.
Better comparison is B57 v S58.
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