I am****uming that in order for it to work it must have a Belleville spring to handle valve open vs valve closed. If cam is changed requiring more spring pressure that might keep the rotator from working?
Rotators are too heavy for performance use. I always replace them with non-rotating retainers when the cam isn't stock.
The rotators [Thomson] for my engine [Crosley] have no weight effect, they are the spring seats. Sorry for u-tube, had better ones but lost them some wheres.
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