i have the 3 pulley set and i was wondering if i change the crank pulley back to stock, would i get any negative effects from the underdrive alt. pulley still on? or would it not really effect my charging system

there isn't an underdrive alternator pulley, it is an overdrive pulley. the potential negative side-effect is that you could burn out your alternator.

http://www.yoursciontc.com/forums/index.php?showtopic=6923&st=0
Info on pulleys

maybe this has something to help you with any questions

yu should be fine, in fact better off without the nst crank. Im not a suporter of aftermarket non dampened pullies. :no: :nope:

yea woops overdrive alt pulley. damn i didnt wanna have to pull the alternater again.

why its not that bad! :P

in theory you could burn out the alternator...i dont know enough about them, but its hard to tell

You should ask the experts who built your pulleys! AIM screen name NSTonAIM.

You can use their overdrive alternator pulley and the water pump pulley with a stock sized crank pulley and you will not have any problems. There are a lot of people around here doing that.