[1930artdeco]

O.k. here is my 1.5 cents worth. This is just my thinking here and my interpretation of physics

#1: If you hang a 65# flywheel on any bearing I would think it would tend to wear faster, even if the bearing is 3" long. Now if you hang a 20# flywheel it should not wear as fast. This is assuming that the crank is flexing a bit as it is fairly long and there are only two other bearings supporting it.

#2: The lighter the flywheel should let the engine spool up faster as it does not have to impart as much energy to move a 20# flywheel (or whatever weight you have) vs. a 65# flywheel. Whether that translates into faster acceleration is what needs to be timed.

This is all just H.S. physics and logic talking here and I can be totally dead wrong. I do not have any facts to back this up, just my logic. I lightened my FW by about 12#'s which is the weight of the counterweights. This would take some weight off of the rear bearing and keep the total weight the same. "I think" the engine spools up a bit faster and she might accelerate a bit faster. But, I think the long stroke of the engine tends to limit how fast she will spool up.

Mike