So those were too tight on the crank snout? Something breaking during installation or in operation? Trying to figure out what would cause such breakage and why....
The ones that were too tight split at the key way. And then it would slowly continue to fracture until it exploded. I've seen other dampers have that issue.
There were some that were too loose. IIRC there were some small block Chevy cranks that were made with BBC snouts. They has little to no press, and they were being used with stud and bearing mount loctite. Those were the cranks that had the snout break off.
All of this was documented back in the very late 1980's. I think it's funny that FD is still in business and doing work for many elite motor sports companies. They are even making dampers for cam shafts in certain applications now.
