thnx for the further explanation but still im not clear on why move the wristpin. if for example you look at a 68x58 cylinder, cylinder height is set up only for a 110 rod and to use a 115 rod you have to lower the pin height or otherwise use a spacer plate ? the cp website shows alot of combos, so i assumed each cylinder was cast specifically for that particular rod length and stroke
what about if you want to use even a longer rod like 120 or 125 etc ? is the cylinders cast for these longer rods or is a spacer plate the only option ? the website says for a 68x64 it has 3 rods options, 115, 120, 125. so if you were to use a 125 rod is the cylinder cast for that rod length or is there some piston with the pin moved 10mm higher or a spacer plate ?