Quote:
Originally Posted by sahyoun
Well considering the two motors share the same bottom end except the m2 has cast in iron sleeves and a far more rigid block due to it being a closed deck. For now the m4 has far higher modded hp figures but give it some time and you'll see 700 hp m4s pretty quickly.
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They share the same crank, main bearings and pistons (with the piston rings modified to be used with cast iron sleeves as opposed to wire arc sleeves from the S55). The connecting rods on the S55 are different.
It is debatable that the N55 in the M2 has a closed-deck block. From the looks of it, it's just a standard N55 open-deck and until this has been confirmed through a tear-down, it is a N55 open-deck block IMHO. The S55 is a closed deck block.
So, no. They don't share the same bottom end.