Just wondering how to lesson this happening. The belt is fairly new I thightened it one day the next day it was loose again not alot but a little. So I am wondering if the green belts work any better than a regular serpentine belt? As in stickier or less stretch. I have and F1A and the power seems to be falling off at above 5k and psi doesnt go past 10. Im not sure about the pullies but I was told the setup should make closer to 15psi. Any suggestions?