So whats the diffrence from the set of pulleys that cost 250 and the one pulley that cost 50 bucks.. what do the other pulleys do? If its not big deal i might as well get the 50dollar one. Im going to put pulleys on mine also, ive been wondering this for awhile.

 

instead of a flat 25% reduction across the board the pulley sets apply a certain amount of under drive to each pump, probably so as not to underdrive the alternator.

 

I dont use A/C that much, windows are always down, but i do have a system, but only using a 400wat amp.. my lights do dim on heavy bass songs, so i guess ill just go with the 50$ pulley, seeing that i dont need the others.

 

Double Post... damn page froze or somthing.. my bad.

 

wow, i had no idea they were that well known. i suppose if the A/C isn't a problem then just the Crank pulley should be good. and for $50's you can't beat it. thanks for the info. also, how noticeable were the gains?

 

2MPG and a noticeable seat of the pants increase. i think its advertised as 15 HP but you know how that goes

 

I think under certain conditions the alternator pulley might be needed.......Super large system and/or large amount of add on equipment...ie...alot of lights, winch, compressor. I wonder what would be better, alternator pulley or heavy duty alternator.

I want to leave the A/C pulley out of the mix or remove the A/C altogether. I am just worried about power loss more then anything.

 

I replaced the pulleys on my D. I bought the set from Jet Performance. The pulleys installed very easily and the instructions included the size belt I needed; too bad it didnt fit! haha. I took the a/c out of my D and I ended up buying the belt from advance auto parts. The stock belt for the D without a/c fit perfectly.

http://www.jetchip.com/

Just specify your make and model and there's a list of parts available. I bought the underdrive pulleys and also the PCM chip.