Underdrive pulley
Thread Starter
Melting Slicks
Joined: Mar 2007
Posts: 2,216
Likes: 5
From: Longmont Colorado
Underdrive pulley
What does the underdrive pulley do and how does buying an aftermarket one give you more power? Is it worth the money for this mod? Is it easy to install? If anyone can answer any of these questions then it would be a big help.
Team Owner
Joined: Aug 2003
Posts: 24,987
Likes: 26
From: Kerrville, Texas USA Hook 'em Horns!
CentralTX Events Coordinator
St. Jude Donor '03-'04-'05-'06-'07-'08-'09-'10-'11-'12-'13-'14-'15-'16-'17
The underdrive pully as a standalone mod won't buy you much. Combined with intake, heads, cam, longtubes and exhaust it adds a few ponies to the equation.
Thread Starter
Melting Slicks
Joined: Mar 2007
Posts: 2,216
Likes: 5
From: Longmont Colorado
Team Owner
Joined: Aug 2003
Posts: 24,987
Likes: 26
From: Kerrville, Texas USA Hook 'em Horns!
CentralTX Events Coordinator
St. Jude Donor '03-'04-'05-'06-'07-'08-'09-'10-'11-'12-'13-'14-'15-'16-'17
There is a lot of labor involved. The time to do it would be when you were doing the cam install. To my knowledge, the UDP is good for about another 5-7 rwhp with those mods. IMHO, it is not worth the cost and labor after the cam swap is complete.
Team Owner
Joined: May 2005
Posts: 23,682
Likes: 9
From: Flagstaff Az.
with Cozmo. The pulley is about 25% less in diameter than the stock one, so the HP lost to turn the accessories is less resulting in the extra HP. Not worth the labor plus the cost of the pulley and belt IMHO. I have one Andy at A&A pulled off of my vert when he installed the Vortech. PM me if you are interested in buying one. 
