I've read many other noise discussions, but nothing seems to match mine.
I just got my car running after being down for 2.5 years. I am hearing a fast pulsing sandpapery high-pitched noise specifically at 2800 rpms, ONLY under load. Not in park/neutral. I didn't run the noise too long 'cause I don't want to damage anything. I heard it two times I pushed it over 2800 and let off quickly.
Car was down from a supercharder malfunction-loose front bearings caused case scoring. Magnum Power replaced rotors with the abradable coated rotors, new rear bearings, fixed case.
Could it be harmonic resonance from a small exhaust leak? I hope not valve chatter, I don't know.
I just got my car running after being down for 2.5 years. I am hearing a fast pulsing sandpapery high-pitched noise specifically at 2800 rpms, ONLY under load. Not in park/neutral. I didn't run the noise too long 'cause I don't want to damage anything. I heard it two times I pushed it over 2800 and let off quickly.
Car was down from a supercharder malfunction-loose front bearings caused case scoring. Magnum Power replaced rotors with the abradable coated rotors, new rear bearings, fixed case.
Could it be harmonic resonance from a small exhaust leak? I hope not valve chatter, I don't know.