First off just want to say that the underdrive pulley is amazing, and balanced far better than that stock heavy-weighter that keeps a door ajar...
So after the underdrive pulley install earlier this year, tried to get the belt to squeak with no success, but now that it is colder and hovering around freezing or lower for startup situations, for the first time the belt has started squeaking after startup. Disappears after full warm up.
I lubricated all the pulleys, burned the excess off the belt, and still squeaks from time to time.
So thinking 1" shorter belt works for warmer climate, but would a 2" shorter belt result in more tension for the colder/wet winter starts? Can't see why else this belt squeak is happening, unless one of the bearings is going like perhaps the alternator, but doesn't seem to be the case.