under drive pulley install
Thread Starter
Safety Car
Joined: Jan 2006
Posts: 3,598
Likes: 0
From: indianapolis indiana
under drive pulley install
i juist got my underdrive pulley. just wondering if anyone has done this yet. i know, iknow i have to move the steering rack and should do a cam while i am at it but i got it for half price and i have had a pulley on my trans am and it made a big diffrence so i want it on now not when i drop another 1k in the car. so any help,tips or install guides on doing this. i bought a manual on dvd as someof youmay know but it ended up being a rip off and did not work. we will see they are sending another one but it is still a burnt dvd!!!
Racer
Joined: Nov 2005
Posts: 255
Likes: 19
From: Midland Texas
When LG did my pulley and cam swap they had to pull the radiator and shroud plus the steering rack and water pump. Pulling the steering means taking off the fron wheels etc. etc.. I originally was just going cam untill i saw what it would take to add the pulley later. Sure would be nice to swap the cam while you already have it torn down because you basically have to do the same stuff to swap pulley out. You may be able to leave the water pump alone for just a pulley change.
Melting Slicks
Joined: Nov 2002
Posts: 3,398
Likes: 2
From: Allentown PA
If you are paying someone to do it, then wait. The cost will not justify the gains. It will cost you a coulpe hundred dollars in labor to do the job. When you do a cam swap labor is free for the pulley since it comes off anyway. It is not a difficult job, just time consuming.
Melting Slicks
Joined: Jun 2004
Posts: 3,439
Likes: 6
From: Newark, DE
St. Jude Donor '06
Originally Posted by vetdude
What is the benefit of the underdrive pulley?
Le Mans Master
Joined: Feb 2006
Posts: 5,762
Likes: 4
From: Chandler Arizona
Originally Posted by Mr. Lucky
It spins your belt-driven accessories slower, so there is less parasitic loss. Net gain = 2-5rwhp.
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