seeing as the charger has done 297000thousand ks lmao
the linish on the rotors has worn off.. causing them to knock together so the charger "rattles".. i know the linish is gone because i rebuilt it with new bearings 30thousand ks ago..
symptoms are- rattles, down at 8psi tops on a cold night 7 normal.. running a 10psi pully on yellaterra snout.. when you snap the throttle open it only hits 4-5psi at first and slowly increases with rev.. only way i get 7-8psi is if i hold it out to nearly the limiter in 2nd etc