View Single Post
  #11  
Old 01-19-2015, 08:13 PM
Mxfrank Mxfrank is online now
Registered User
 
Join Date: Dec 2006
Posts: 3,963
Quote:
Originally Posted by 79'_240D View Post
Thanks for the threads guys I will look into those options. Im not looking for a cure all. I know it probably needs to probably be driven longer but thats not really possible. This problem only happened after I put that post glow relay on. And just so ya know I dont walk in -20* temperatures. During the summer I ride my trail 90.
Careful what you do. In one of those threads, the poster replaces the pulley with one that happens to be larger. Although beatuifully executed, the alternator is under-driven. Under driving an 85 amp alternator this way would give you the performance of a 55 amp alternator.

The output of an alternator is usually quoted at 5000 RPM (alternator RPM is 2-3 times engine RPM). At low rotational speeds, an 85 amp alternator doesn't make much more power than a 55 amp alternator. I'm attaching performance curves for various Delco alternators (sorry, I don't have bosch curves) so you can see what I mean.
Attached Thumbnails
High Output Alternator?-alternatorcurves.jpg  
Reply With Quote