New clutch chatter

I just installed a new stage 2 clutch kit about 700 miles ago. I drive without hitting boost for about 500 miles for brake in. I got on it hard the other day and when I got to about 10 psi boost I heard a loud banging sound. Could hear it over my load music. When I got home I realized my clutch was making a lot of noise. It gets better or worse depending on pedal position. I can still shift gears if I don't push the pedal all the way. If I push it all the way down it grinds and can't shift. The chatter is there all the time but like I said it changes depending on pedal position. What could it be? Damper springs? Or something else entirely? Please help.