underdrive pulleys?
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From: Southaven, MS (near Memphis, TN)
My car gained 6rwhp/10rwtq from a Powerbond 25% pulley... got it with the new belts and bolt from Byunspeed for $215 shipped...not sure if they are still doing that price though...
pros:
reduction in parasitic loss from the accessories, which means more power to the wheels.
cons:
possible reduction in Alt output when under load. so if you have a system...i woldn't bother
reduction in parasitic loss from the accessories, which means more power to the wheels.
cons:
possible reduction in Alt output when under load. so if you have a system...i woldn't bother
asp offers an alternator OVERDRIVE to offset the charging issue. it mainly occurs in auto cars with systems. i have a powerbond unit, m6 w/ amp and subs. i see no charging issues unless the dash+headlights are on and i am stopped with the volume up.
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I got a SLP unit, it DOES come with a SFI #, I know that was in issue for years. Seemingly Powerbond is the same actual unit but supposedly cheaper, Ive never held both in my hands at the same time.
The SLP unit has deep grooves and Ive been running on a stock tensionier for a while with out any thrown belts.
I got mine from SLP, they had everything there and fit perfect. The belts were just properly measured, you can obtain those at any local auto store as long as you know the length.
Also no ALT pulley, no charging issues.
The SLP unit has deep grooves and Ive been running on a stock tensionier for a while with out any thrown belts.
I got mine from SLP, they had everything there and fit perfect. The belts were just properly measured, you can obtain those at any local auto store as long as you know the length.
Also no ALT pulley, no charging issues.
Thread Starter
Staging Lane
Joined: Jul 2008
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From: South Jersey (15 miles from Atlantic City)
The Summit Pulley is on my WS6 now. I had a coupon for $50.00 off from Summit and i ended up getting the bolt and belts and pulley for around $175.00 shipped. I installed it a few weeks back. Great fit and finish. I will post the goodyear gb belt part #'s in a few
We make a overdrive Alt pulley to compensate for the crank underdrive. $69
Here is one installed on our 240 amp alt:
They come standard on the alt.
Also, the tensioner pulley has higher outer ribs to help retain the belt at high RPM's:
Here is one installed on our 240 amp alt:
They come standard on the alt.
Also, the tensioner pulley has higher outer ribs to help retain the belt at high RPM's:
Anybody ever weigh a March UD?? price was good about $190 SDPC. 
You could always do the Big 3 wire upgrades.
http://www.gmfullsize.com/forum/showthread.php?t=106041
http://www.gmfullsize.com/forum/showthread.php?t=106041