Bob weight is what balances. (the weight of the pistons, rings, pins, retainers, rods,rod bolts, and bearings.) That weight is totaled and added to the crank throws on the balancer. The machinist then knows how much weight to add or drill out of the crank counterweights.You mentioned running a 4 speed. Whichever crank you use it needs to be drilled for a pilot bushing.[/QUOTE]
Yes you are correct. I am trying to get the lightest rotating assembly using factory pieces. If the forged 273 crank is a little lighter than the 318 cast crank. So with the lighter rods I'm using the machinest might not have to add any weight with the forged 273 crank. Does that make sense? And it will be a lighter overall package.
