I think Pittsburghracer said it. When they first came out no one was honing the damper to fit. When running they would split at the key way. Also when they are that tight (or too loose) they don’t absorb harmonics like they were designed to. Also, some guys think the damper is on the front of the crank to make balance corrections on it. So on a crank balancer the rpm is usually too low to center the inertia ring and it looks like it’s always out of balance. I know the the guy who owns Scat cranks doesn’t care for the ATI damper. He doesn’t like the FD either but the reasons are different.
