i have the asp underdrive pully and overdrive alt pully. havnt put them on yet. ive been worried about the effect the smaller pully will have on my waterpump and alt. ecspecially when i put my 34 in rad and 05 e-fans on, along with a punch 12. how much will the underdrive pully make when at adle/cruisin with the e-fans on and bass playin?

 

I did the swap with a very same setup I have twin flexalites 34 rad and a JL amp that slams power i ran it for two summers with no problems and that was with a 105 alt I later put a 145 alt in because one came up on hear at a good price. I would say run it a until you find a bigger alt but it will be fine until then

 

cool. did you do the efan harness or did u put a thermostatic switch in?

 

My fan setup from flexalite came with a thermostat switch and it also ties into the ac condenser clutch switch so when the ac is on the fan run and I cam say in this heat the fans run none stop and my amp is kicking and no complaints but this is with the new 145 alt but even with the stock 105 alt I had no problems I just switched it for the added insurance of knowing I could run more without worry

 

Depends on your volume. I just got through putting the underdrives on and when the bass hits my amp will shut off at idle like at a traffic light at just over half way up. I have a brand new interstate battery mdp 78, and a kinetic battery running the amp. Runnin down the road I have no problem. Thats my experience.

 

you'll be fine since you have the alt pulley. I've got a 700W amp that I run ***** out & usually run a full 14.4V unless I'm sitting still & it will drop to mid 13s

 

DO NOT USE THE FLEXALITE THERMOSTAT! They are grabage, Mine failed on me and left me overheated. Many reported problems with them