I'm running a 2.6" pulley with a zzp over sized tensioner pulley. When I accelerate and hit about 2500 rpms, I hear belt noise. A steadily increasing chirp would best describe it and the noise happens both when in boost and not. It's been rather cold here at night while its doing it (40* and such in Northern Florida) and I dont know if that has anything to do with it but just in case.

Does anyone have any idea what it could be? Pulley bolts? Does the tensioner have a certain tq spec that I exceeded? Or maybe the tensioner is too big/small and I need an adjustable tensioner? Any advice helps!

 

make sure the belt is on all the pullies correctly mine was off 1 rib on the ac pump and it made noise

 

ill check that. thank you

 

checked all the pullies and it appears that the belt is on fine. The squeak will be there when I cold start it but will eventually go awhile after idling for 5 minutes but then it'll squeak if I give it gas

Could it be the bearing on the tensioner?

edit: also, I've gone wide open throttle 2nd, 3rd and 4th consecutively and the belt didnt slip

 

could be that or the idler or the alternaor making noise

 

It's probably the tensioner pulley. Mine's been chirping for years, never caused a problem, just loud/obnoxious. You'd have to replace the thing to get rid of it. Not worth the hassle imo.