Many racers put the larger alt pulley on for more hp but it kills the charging at idle. Ron
large pulleys on racing cars keep bearings safer at high rpms
No racers started doing that years ago to pick up a few horses by slowing the alt down and its not as hard on the rotor. Sure the bearings will spin slower since the alt is slowed down but I have not seen anyone tear bearings out of their alt with stock size pulleys when racing. I run and always have run stock size alt pulleys on my street and race cars and have never had any bearing trouble. Ron
