to clarify, the bore is fixed at 84mm in both examples. im just toying with the idea of swapping in a shorter stroke crank to bring the revs up (and lose torque). so in the lower graph, capacity is 2.8L, in the top graph (shorter stroke) capcity is 2.5L.
im not sure how the rod length is going to cahnge yet. could be up to 5mm longer in the short stroke crank. i hear that having the longer rods will improve torque a little, thou i cant see how. and ideas? i mean, its still a 75mm stroke, but would just have a longer rod so the piton would reach the block deck.