Ok, now that I have been educate on the facts that GM wrist pins are far more prevalent than the Ford pins, here is a corollary question: What the heck is up with the odd ball diameters of the pins?
Author: Jon Wennerberg <jonwennerberg@nancyandjon.org>
Date: Thu, 24 Nov 2011 16:51:17 -0500
That's a simple one, Mayf. I'm surprised you didn't figure it out. .927" = 23.546 mm, and .912" - 23.165mm. Both are pretty common metric measurements, I guess. There -- now does it make sense? Jon a
Well, ya think? I suspect when these were dreamed up most of the engineers couldn't spell metric. Let alone coming up with odd ball number like those you mention. But, in a curiously odd, very odd, w
How did Packard come up with .9804? My earlier GMC engines, and my Lotus 907 used .990 wrist pins a standard BBC size. Why not go to 1.000? If they did common sense stuff like that, what would we nee
Likely they start with 1 inch stock, and when the piece is finished that is where it ends up. mjb. _______________________________________________ Land-speed@autox.team.net Donate: http://www.team.n
You have to remember that in the '50's when these auto companies were producing a million vehicles a year a penny saved on the cost of each would have paid the salary, fringes and overhead costs of a
These were designed in the days long before FEA. The accepted method was to start oversize, as Mark has said, and then continue reducing size along with tensile testing until the breaking strength is
If you start with off the shelf material you save a pile of money with no tooling costs and a material universally supplied by most mills so not tied to any vendor. You can specify very loose toleran