Hey guys, I just ordered a set of ASP underdrive pulleys, my question is has anyone had any problems with charging after intalling them. I have 2 amps in the truck, and I dont want to have any problems once I install them. Also does anyone have any before and after numbers from just the pulleys. I am going to be installing a TR 220 cam and springs at the same time so I wont be able to see if the pulleys really helped or not. Thanks!!

 

Did you order the overdrive pulley for the altenator? You'll want it.

 

either that or upgrade to a 145 amp alt like i did.

 

yes I got the kit that comes with the smaller Alt pulley, so with that I should be ok.

 

think about it.
the smaller alt pulley is like the (smaller) crank pulley that slows down your accessories.
so a smaller pulley on the alternator is going to create less charge.
am i on the right track guys?

 

I dont know maybe the alt pulley is larger, the kit said it would compensate for the smaller crank pulley, and turn the alt faster. I just dont want to have charging issues. Is the 145 alt just a plug and play installation?

 

yes the 145 amp is plug and play.

 

The smaller pulley on the crank makes the belt move slower (The outside of the pulley is smaller, so the belt moves less for each revolution), slowing down accessories. The smaller pulley on the accessories make them turn faster (The outside of the pulley is smaller, so the accessory turns more for the same distance of belt movement)

N1*D1=N2*D2

N1 = Crank speed
N2 = Accessory speed
D1 = Crank pulley diameter
D2 = Accessory pulley diameter

 

This guy is right^