from what i understand the damping part of the damper is between the hub and the outer drive ring for the accessories, so i cant really see how this has an overall effect on the crank damping, is it not that the rubber dampener material is to actually reduce shock loadings on the drive ring for the accessories????
as a thought im currently looking for a new pulley as mine has seperated, but as my car is a pure track car ive started thinking more along the single crank pulley route...and the more i look into it, the less i find about actual evidence, of ``what the need`` is for the damped pulley.
i can understand maybe the need on a car that maybe covers many miles a year.........