Re: Considering Packard v. Hudson

Posted by Owen_Dyneto On 2009/12/30 23:39:33

Eric, here's the other part of the equation. The crankpin length of the 356 is 1-3/8, but only 1-3/16 for the 359 engine. So not only are the main bearings longer in length, the crankpins are wider with wider rods at the big end and presumeably wider rod bearings. Thus to fit the package into about the same length of engine block, the crank cheeks between throws are narrower. Being narrower, they have less mass and since the diameter of them can't be increased, then the width (and thus the overlap) of the counterweight must be increased.

I think that should close out this very interesting diversion from the original topic, it's been fun, I never actually did the math on the bearing lengths, but I was confident that was the answer. More bearing area in the 356, both mains and rods.