Flapjack
Lunatic engine swapper
Change the belt back and see what it does. I'm assuming the old belt still fits.
If everything else was fine before you changed the belt, it's likely the belt causing the noise due to the changed length. Maybe your tensioner is bad, but if the belt is just too short/long and is maxing out the tensioner, changing it is not going to help.
**EDIT**
Just remembered the number of ribs are different. I guess the simpler step would be a new tensioner, then a longer/shorter belt.
If everything else was fine before you changed the belt, it's likely the belt causing the noise due to the changed length. Maybe your tensioner is bad, but if the belt is just too short/long and is maxing out the tensioner, changing it is not going to help.
**EDIT**
Just remembered the number of ribs are different. I guess the simpler step would be a new tensioner, then a longer/shorter belt.