Summit Underdrive Pulleys

BlackSTX · #1 Wed, May 27th, 2009, 11:51 AM

Quick question for you.... Do you experience any charging issues at lower RPM's? Coworker had a kit on his Mustang and said that was the only negative he experienced.

***Power Hungry*** · #2 Fri, May 29th, 2009, 01:53 AM

Undercharging at idle is a common problem, especially with E-Fans. The only thing you need to do is raise the idle 50-75 RPM w/o fans or about 100-125 RPM with fans and you're good to go.

BlackSTX · #3 Fri, May 29th, 2009, 02:45 PM

Thanks Bill. It's much lower RPM increase than I expected. I wasn't sure if most of the kits changed the alternator pulley too, but I see none of them really do.

***88Racing*** · #4 Fri, May 29th, 2009, 04:18 PM

Quote:

Originally Posted by BlackSTX

Thanks Bill. It's much lower RPM increase than I expected. I wasn't sure if most of the kits changed the alternator pulley too, but I see none of them really do.

Some kits out there are still three pulley kits. Just depends on who the mfgr is and what they thought was best! Majority of pulley kits are only 2 pulley kits.

Lars