The 230 & 250 cranks differs from the 292 by both stiffness (more journal overlap: .50 square inches vs .32 square inches vs .07 square inches), and the RPM at which destructive harmonic vibration occurs.
The 292 bad spots will be at lower RPM due to the lower resonant frequency. The really bad ones will happen in all these engines, but at different speeds (the next order in RPM is far above anything you would use).
The actual RPM is a direct function of the crank's resonant frequency, which is difficult to calculate from engineering data. Roughly? Between 225 and 275 Hz.
Using the low number (292), the bad spots are at
1,500 (faint)
2,250 (weak)
4,500 (worst)
5,400 (very bad)
6,750 (bad)
Using the high number:
1,833 (faint)
2,750 (weak)
5,500 (worst)
6,600 (very bad)
8,250 (bad)
For comparison, a V8 crank at 350 Hz:
2,333 (faint)
3,500 (weak)
7,000 (worst)
8,400 (very bad)
10,500 (bad)
As you can see, all the numbers are different: no resonance occurs at the exactly the same RPM in any 2 cranks, and where there are similarities they're at different harmonic orders and amplitudes.
