Has anyone used the Underdrive pulley for the Hemi yet? I know its minimal gains - but I am thinking with Superchips, K&N CAI, a Flowmaster Cat Back, and the underdrive pulley I could be adding some strong gains?

My concerns about the underdrive is the loss of charge and power to the other accessories? - Has anyone experience poor air conditioning performance as a result? And if you are a fan of the underdrive - which one would you reccomend - I was looking at the motoblue here from RPM outlet?
http://www.rpmoutlet.com/ramhemi.htm

 

Most of your problems with charging and everything else is going to be at idle, other than that you should charge fine and everything else should work properly. Do you have trafic gams or sit ideling for long periods?

 

I personally dont like them. They are too much work for the very minimal gain if any. Plus you could be creating problems.. Just not a good idea.. They say if you dont gain 5% the mod is not worth it, because you wont feel any difference.. Good rule of thumb..