Lee, The Motorola and the Ducy struggle under the best conditions to keep the battery charged. If you start off with a good battery and don't turn on the radiator fans and the blower motor it might keep up. 90 amps is the cold reading, after the alternator heats up it will start dropping and will go down as far as 75 amps. John Hervey www.specialtauto.com -----Original Message----- From: dmcnews@xxxxxxxxxxxxxxx [mailto:dmcnews@xxxxxxxxxxxxxxx] On Behalf Of Lee Edmonson Sent: Saturday, February 16, 2008 2:06 PM To: dmcnews@xxxxxxxxxxxxxxx Subject: [DML] Alternator ? Should have included... I should have first asked if the 130 AMP Delco alternator is the way to go. Is a higher amperage output better than less? Would 90 AMPS be OK? My original has not failed after 50 K miles, it just does not keep the battery charged properly even though I drive it several times each week. This may partially be due to the fact that most of my driving is short trips. To address comments privately to the moderating team, please address: moderators@xxxxxxxxxxx For more info on the list, tech articles, cars for sale see www.dmcnews.com To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnews Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/dmcnews/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/dmcnews/join (Yahoo! ID required) <*> To change settings via email: mailto:dmcnews-digest@xxxxxxxxxxxxxxx mailto:dmcnews-fullfeatured@xxxxxxxxxxxxxxx <*> To unsubscribe from this group, send an email to: dmcnews-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/