shawnk007

Ive never had an issue with mine. If your that worried, just install the crank pulley. Thats where the added power comes from anyway....

Texas5.0

Whats a stock alternator?

MEM 302 5.0L

idk ...its less than 100 though..either 75, 85, or 95...cant remember

dimebag

underdrive pullys... never really wasted my time...

and **** w. stock pullys my **** drops idle and voltage alot w. stuff running

nothing runnin its at 14 volts, and 750
ac on and blower full blast it wont idle, itll die
and other **** on its not too good either

but i never use my heat/ac so who cares

pat

I guess i have to carry a jumper cable then, i already put a 140 amp on , but im still worried, the volt gauge stays in the middle when im on the gas, and when it idles it drops one bar below the middle so i guess thats what worrys me.

85GTsleeper

you will only have to remotely worry about voltage loss if your at an idle for a veryyyyyy long time

Tony71502

What? They do both.... whats the point of sacrificing performance(although minimal) by keeping the alt pulley the same when using aluminum. My UD pulley kit is aluminum and indeed has a smaller alt pulley. But regardless, it runs fine.

MEM 302 5.0L

hmm i heard that some brands dont change the size..lol maybe its just me[&:]

jthorn9

I only had issues with the U/D pullies that came on the car when I bought it last year. They had blue U/Ds but no alternator pully, as soon as I put the BBK on there with the alternator pully, problem solved. Now my big stereo system puts a nice drain on the power in that I can't hold a charge for longer than 30 minutes with that damn thing on and I'm sitting still, but other than that, squeeky clean.

88_cobra

maybe a dumb question, can u run ud pulleys with a sc?