just ordered my underdrive pulley
my 25% pulley needed a new belt. I had to go with i wanna say 95 3/4 inch belt. u can try it but like i said mine didnt work i could slip the belt on and off without touching the tensioner...good luck
I also only run the u/d crank pulley
I also only run the u/d crank pulley
Last edited by dipsherry; May 4, 2011 at 01:09 AM. Reason: forgot to state i only run crank pulley
Champion
Joined: Jun 2004
Posts: 2,811
Likes: 2
From: Ft Campbell, KY/TN
that is correct. If you are doing the Crank, water and amp pulleys, then you don't need to change belts.
Sorry, you need the 95 inch if just doing the crank.
Sorry, you need the 95 inch if just doing the crank.
Veteran
Joined: Nov 2010
Posts: 267
Likes: 0
seems like a good item. 12 rwhp is typical? Im wondering if a local auto parts store would have a 95 inch belt. This seems like an easy DIY. Can someone posts a link to the underdrive pully. Im guessing just the crank is all youd need right? I love learning about another mod to add. I swear its addicting lol
Grand Champion
Joined: Apr 2010
Posts: 5,011
Likes: 6
From: Meeker, CO
If you do only the crank pulley you'll find that your alternator puts out almost nothing at idle speed. It's better for battery life to get the smaller alternator pulley along with the crank pulley to bring it back up to operating speed at idle.
Professional
Joined: Mar 2011
Posts: 167
Likes: 0
From: Ontario, CANADA
I wouldn't do the water pump pulley, the last thing you want to slow down is your cooling system.