Wow, sorry to hear that. I have been running one HARD for almost 2 yrs and GP Bob for longer than that and have not heard of that problem. I will be in Vegas Nov. 4-6th at SEMA and will speak to Magnuson and Alpine about it.
Can you feel it in the pulley / nose of the SC if you spin it by hand without the belt on? Might want to use a piece of hose or a stethoscope to help isolate where the sound is coming from.
The Dell Financial Warranty was provided with some SCs last year that sold for full retail and were for coverage of the powertrain - but reading the fine print, Alpine parts are mentioned. The registration card HAD to be mailed within a certain time frame and had other limitations. It should be posted in my gallery or email me and I can send you a copy.
Bummer either way - manifold has to come off to remove SC for service.