Ken,thanks for posting that link,I've read some of his other stuff too. Well,many of us have taken long rides in modified inline engines,mostly 50 year old 4 main bearing inline 6's with millions of cycles on the crankshaft.Droning along for hours at 2000-2800 rpm.The harmonic dampers are just old ones with fresh paint or "rebuilt" by one of the several places that specialize in it.These rebuilders appear to use an injected silicone rubber and don't have have a room full of engineers to figure out all this "dampening" logic.Some engine have lighter pistons,some are carefully balanced,but overall I'm not hearing about crankshaft failure.
So...I suppose you might say it's not that big an issue on a street engine not spending more a few seconds at high rpm.
