alternators
sound like you need one of the modern type alternators that put out about 3/4 of their amps at idle. most alternators need to be up in higher rpm range to put out their 100-140 amps., and only give a small amount of amps at idle. if you are stuck in traffic with say a street rod that has electric fans, electronic iggy, maybe an electrictronic fan on tranny cooler andn a radio blasting, your cooling fans probably wont even begin to run with enough rpms to cool your ride. you should look into this type of alternator. no big deal to hook one up. also i would ALWAYS recommend a shroud with a mecfhanical fan or an electrc fan(a full shroud if possible.) even fork lifts have shrouds and they only go a few miles per hour, but can also overhaet, thats why they use a shroud chevy art