Originally Posted by
lancerman
I got a better idea. Why dont you run your six bolts with cut cranks. Make sure the thrust has been cut oversize as well. Then run it like that without the nitrided coating. Then let everyone know how long it takes to crankwalk or spin a bearing.
Anyone who builds a 6 bolt knows not to use a cut crank. The factory manual says "do not cut journals undersize or the surface coating will be lost" . Factory does not sell oversize bearings for 1g cranks. However the 2g manual says its okay to cut the crank. And they do sell oversize bearings for the 2g motors.
That just reinforces that there is a difference between the two cranks (beyond the number of holes), and this is not in question. It doesn't provide any evidence that there is a causal relationship, though, between this difference and crankwalk rates. The exact same correlation can be make with holes as well (although, it seems absurd to consider this relationship to be a causal one). You might be surprised, though, at how often people infer causation from correlation while ignorning or simply not identifying confounding variables.
It's really not that difficult to set up a fairly well controlled experement in this case, as already stated, if we assume that the driver has no effect on crankwalk rates (and ~ 600 (400 nitrided, 200 not) test subjects is overkill, I must admit, but I prefer several tests with large sample sizes for obvious reasons).