ok so i know one main complaint of an underdrive pulley set is the alternator. i have an upgraded 130amp alternator, and i plan on putting in a system with a subwoofer and capacitor. that should be fine with the underdrive alt. pully right?


and has anyone done an underdrive set with a 3" rancing crank pully on a 5.0? leave me some info before i start buying parts that will mess stuff up. thanks


btw, i bought an FRPP pulley set. I was told do not get anything other than steeda march or ford.

 

I have pulleys and a sub and it runs just fine.I didn't even change my alt pulley and stillok.The frpp pulleys are fine.

 

My car has underdrives and it discharges at idle with anything on.
I daily drive my car and never have I been left with a dead battery.

The scenario of alot of accessories on like idling in traffic in the winter will not kill my battery.

90% if not more of the time I'm not idling so this gives plenty of time for the battery to charge.