General Centrifugal ?: Clutch to slow SC revs at higher RPMs
I'm sure something like this could be possible; however, I'm not sure if could ever be cost-effective. Basically, I was wondering if anyone has ever thought of coming up with a SC pulley design that would allow the pulley to begin to disengage as the revs got to a certain RPM. This would allow the supercharger to get to its maximum efficiency quickly and then gradually disengage to keep the supercharger at the RPM where it is most effecient. The Mercedes Roots blower has a magnetic clutch that disengages the supercharger below 3k RPMs to enhance fuel mileage. I was wondering if something like this could be retrofitted to work in the opposite fashion. Also, I'm not sure if these clutch devices are "on or off" or if they can gradually disengage.
Let me know your thoughts...