I have had the same Fluidampr on three engines and and my current engine is smooth as silk with that 20 year old Fluidampr.
Whenever a crankshaft breaks some builders are quick to point the finger at a Fluidampr as the cause just because they don't run them on their engines twocents

Gus beer

my savoy.jpg
64 Plymouth Savoy
493 Indy EZ's by Nick at Compu-Flow
5-Speed Richmond faceplate Liberty box
Dana 60