Vortech pulley size

[.rampage.]

I just purchased a v2 supercharger kit intercooled and hks blow off valve it's the exact kit that's on YouTube http://m.youtube.com/watch?v=JiUIgB6J6T4 the guy I bought it from says its a 3 inch pulley how much boost is that? Wanted to know before I strap it ok

 

[.rampage.]

Bump no one? actually measured its 3.5 inches

 

[1uzvl]

mine does about 6 psi at 6000 rpm give or take.

 

[.rampage.]

Thank you