Does underdrive pulley require a different belt?

[Fruitbox]

Im installing an underdrive pulley on my 94 3.0, my truck has A/C, can anyone that has installed one tell me if they had to change the belt length and what length belt they used? Thanks

 

[stmitch]

Yes. Because the pulley is smaller, you'll need a shorter belt. The belt size depends on the pulley you use. If you're buying it new, the seller should be able to tell you what size would be required.

 

[Fruitbox]

Thanks, ive been reading arguements about this mod for a while now and I think I changed my mind, im going to be lifting my truck with larger tires so my rpms will be lower. I wanted to free up some HP but im already installing an electric fan, i dont want to take the chance and mess with the waterpump speed, expecially since most of my wheeling is low rpm.

 

[Rearanger]

I changed my mind, im going to be lifting my truck with larger tires so my rpms will be lower.

Your torque will be lower as well.

I wanted to free up some HP but im already installing an electric fan, HP

You won't notice anything different, especially using larger tires.