pat

hey guys is it true that having under drive pulleys makes your battery run low voltage? and if your driving for a while and shut it off and try to start again it wont start? if so what would i have to do to prevent this problem? because im stuck with these for now do i have to make sure i have someone around to jump my car? what do you guys do?.
thanks

nitrous_bob

yes it's true

use the stock alt pulley or carry a charged up jump box

85GTsleeper

ive had mine for months and i never had the car lose too much voltage to start my car.

MEM 302 5.0L

just get a better alternator...that charges better
i upgraded to a 130 amp

Tony71502

Ive had no charging issues at all with my UD pulleys, with an oem charging system. The only time the voltage is relatively low is when at idle.... but even with headlights, blower motor, and radio going at once I really have no trouble. I think its just somthing that happens with worn charging systems and people tend to blame the UD pulleys.... in addition to having a bunch of electrical stuff running.

chath_brick

i've never even had the voltage dip in the least in my car, there is absolutely zero difference in charge since i installed them...but i have an sn-95

MEM 302 5.0L

another way around it is to get aluminum pullies...not steel... they make them lighter instead of changing the size of the alternator pulley.....

chath_brick

yeah, i have the blue summit aluminum ones...they work great (anything more and you're just paying for the name)

92hatchLX

I never had an issue with my underdrive pulleys and charging issues (beforeI got rid of them for the s/c)

chath_brick

pfft, just an excuse to brag about your s/c