3.5 is the smallest you should to without doing some more intensive mods, and there is still the chance of having KR.

ok i wont be modding it for a while i just was wondering i'm still kinda new to superchargers my old bonnie was an se and now i'm still learning i dont want to blow it up

With no supporting mods, no smaller then a 3.5" and even then it'* hard to say. you can drop to a 3.1" with stock MAF and injectors. But you need a lot of supporting mods to get to that point. If you want to drop pulley size I suggest getting a MPS and then you can change pulleys real easy. Start with a 3.5, then add other mods like headers etc.

ok i just want a little more power nothing crazy just enough to go to the track and have some fun

Just start off moding slow. That'* the safe way.

thats the plan i've been reading alot of what has been done the only bad thing is down here you cant find parts or shop that will do alot of upgrades i can do most of them myself but somethings i want to be safe and pay to have it done right