[Christ]

Originally Posted by dwtaylorpdx

The harmonics are more complex than just balancing the shaft, they result from the engine power pulses, chassis rigidity, axle setup etc... The longer the element the more susceptible to harmonic whip it becomes its why the GM AL drive shafts have a weight ring about 10 inches from the end of the shaft, its to dampen the harmonics. Slower is surely better, especially for a street car!

Long as you can stay in the sweet spot for your engines design.

Dave

I thought about the harmonics vs. balance thing after I posted, just didn't bother to edit it.

Slower is definitely better, but obviously, you can only get so many gear ratios reasonably.

I think for EM members, the one piece driveshaft is more attractive because there are less maintenance items to think about, and they do tend to run smoother IMO.