P-1SC-1 kit belt tension

We got the kit with that supercharger (only sc kit for in market for the car so far) in a 2012 Mustang V6 and installed it. One issue we have is what is the proper supercharger belt tension; the kit instructions is not particularly clear. And contacting ProCharger got us the reply "tighten it until it is tight," which in my book is not a proper reply. I do have access to serpentine belt tension gauges, you know, the one that you run the belt between 3 pulleys and it indicates the tension.

with the manual tensioner i tighten mine until i can flick the long side to make a guitar sound,
then tighten it a little more till it sings when flicked,
you should also chect the tension after running it, belts will stretch alittle after first usage...:eagerness:

Thanks for the info. My concern is overtightening the serpentine belt; eating a bearing or shearing the belt is not a good way to end a day you know. ;)