On Turning Stock Cranks

[Raptor]

The physics on the small contact patch are accurate, there is less area to absorb load, but still not a problem. The formula 1 circuit and bikes should be adequate proof of that. As with anything else, if you arn't turning extremely high RPMs there is no reason to ever consider reducing journal diameter other than getting past blemishes on the journals.

If the nitriding is only .012" I definately would have it re-nitrided.

Last note on the journal size thing, with a large shot of N20, I would probably opt for the larger journal just due to the more violent immediate load on them that nitrous can cause which would make the contact patch theory more important.

Any other thoughts or comments on this? I love this kind of thread just for the mental exercise it causes. At my age that sort of thing is good for ya.