Zzeal Posted November 2, 2015 Share Posted November 2, 2015 Is there a formula, or rule of thumb, about how much contact is needed between a 6 rib serpentine belt and an alternator pulley? I've only got about 38 degree's of wrap around the pulley, but I've got very little electrical going on, just an electric water pump and cooling fan, which together draw 29 amps, and only intermittently. On a rare occasion I might use the headlights. This is on an LS2, with the stock tensioner moved over from the passenger side. I haven't had a chance to drive it yet, I'm in the middle of upgrading my radiator. If you guys agree that this won't fly, then I'll maybe try a route from the top of the crank pulley to the top of the tensioner. The top of the belt would then barely clear the bottom of the water pump, and I don't know if these belts vibrate up and down a bit. Anybody know about serpentine belt harmonics? Steve Quote Link to comment Share on other sites More sharing options...
tioga Posted January 18, 2016 Share Posted January 18, 2016 I would want more wrap. I assume you can't come off the crank & straight up to the tensioner? This would allow you to wrap around that idler after the tensioner & before the alternator giving much more wrap on the alternator. Since the crank pulley is so much larger the less wrap on the crank would not make much difference. The other way to get some more wrap would be to put a idler on that nice big upper alternator bolt. Quote Link to comment Share on other sites More sharing options...
Zzeal Posted January 19, 2016 Author Share Posted January 19, 2016 Thanks, tioga, for the suggestions. The routing has turned into a low priority because the setup as pictured seemed to work ok, and there's so many other things to get done on this car come spring. Steve Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.