Alternator overdrive pully

[vlj1216]

I ordered an alternator overdrive pulley to run with my underdrive crank pully. Anything special about removing the stock alt pulley? Bolt size?

[vlj1216]

Also when I watch my voltage in the DIC it fluctuates between 11-14 is that normal with the underdrive crank pulley or is my alternator on the way out. My alt light has come on once.

[vlj1216]

OK so now I've read that we have an decoupler pulley. It freewheels on deceleration and it's supposed to work with DOD. My DOD is deleted. Is the decoupler pulley with a DOD delete and 25% underdrive crank pulley a better option than an overdrive alt pulley to help bring back up the voltage? Anyone wanna join in?

[-Ray-]

I had an under drive pulley on my G8 with no issues. Yes, it ran a little slow at idle, but I don't drive in traffic.

[TooManyHobbies]

Seems silly to put on an underdrive pulley and then overdrive the alternator. Whatever meager gains you were getting are cut even further.