i plan on getting a alternator pulley and a water pump underdrive pully for my 3800 n/a from zzp.roughly how much hp's could i gain?and one more question for the water pump underdrive pulley it says i think 14% is out of stock but 10% is whats the diff?thanks

 

sorry that the alternator pulley with the 14% and 10%,shows you how much i know about pulleys.

 

umm guessing its pointless to do that?

 

i didn't know that changing those pulleys would do anything...

 

The underdrive pulley's offer more power at a sacrifice for specific performance. An underdrive alternator pulley will give power, but won't pump out as much juice so you will want to cut back on the stereo equipment and other electronics in the car. The waterpump underdrive will slowdown the amount of coolant delivered to the engine.

On the otherhand, an overdrive alternator pulley will give more power to the electrical system so you can run a larger stereo.