Pulleys

[WildThingAndrew]

I was wondering if anyone has installed the 3 piece pulley set on their truck and how diid it work... HP, Drivability, GAs Millage, and Cooling... THX

[snoman]

Just remember that "power" pulleys work by reducing water pump and accessory speeds. If you have tall gears in truck it may not be best deal over all. If it a criuser that does not see much hard work and is geared properly you might do okay with one and see a slight MPG and power improvement.

[gbishop]

I can't use the underdrive pulleys in my truck in that I already need more power to drive my audio system as when the bass hits, the lights tend to dim a little. That is my next project.

[ROD1969]

I found that they do work, but you need to put a 160 degrre thermostat in and it dose create low voltage at idle.