The Ford Barn

rotorwrench · 09-09-2019, 06:18 PM

I think they were more concerned with hardness on rotating assemblies. Brinell testing is mostly used on course stuff like castings but the stationary parts were not all that hard. If cast iron is too hard it gets brittle. Casting techniques then were not what they are now for sure.

Ford used tooling to get the job done as quickly as possible with the best results possible. Honing of cylinders is not something that can be skipped. They may have used ball hones so they could get a quick cross hatch without worrying about set up and stone wear but I don't know for any certainty. Rings won't break in without a proper crosshatch on the cylinder walls. If they were power honed, it would likely have been by a machine that could do all four cylinders at once. Boring would have been done the same way. It can be called reaming if that was how the tooling was designed. Some of the machines Ford had were pretty amazing. They would drill and tap all of the holes on the block at the same time.

09-09-2019, 06:18 PM	#11
rotorwrench Senior Member Join Date: Jun 2010 Location: San Antonio, Texas Posts: 18,010	Re: babbit tolerance? .000? I think they were more concerned with hardness on rotating assemblies. Brinell testing is mostly used on course stuff like castings but the stationary parts were not all that hard. If cast iron is too hard it gets brittle. Casting techniques then were not what they are now for sure. Ford used tooling to get the job done as quickly as possible with the best results possible. Honing of cylinders is not something that can be skipped. They may have used ball hones so they could get a quick cross hatch without worrying about set up and stone wear but I don't know for any certainty. Rings won't break in without a proper crosshatch on the cylinder walls. If they were power honed, it would likely have been by a machine that could do all four cylinders at once. Boring would have been done the same way. It can be called reaming if that was how the tooling was designed. Some of the machines Ford had were pretty amazing. They would drill and tap all of the holes on the block at the same time.