Join Date: Mar 2002
Location: Austin, TX, USA
Re: Alternator Amp?
Probably so. Electric fans vary. They can pull as much as 80 Amps upon startup, but most will run steady at 20-40 amps depending on the fan. But it really depends on your alternator.
Many of the 100Amp alternators I am familiar with are the 12SI type - particularly the one wire type. They do a pretty good job, but their idle charge current rating isn't as good as say a CS130/140 alternator. That can be an issue if you're idling in traffic on a hot summer day, and your 100Amp alternator can't keep up with running the fans and other stuff. You'll need to get some specs on your alternator to know for sure.
Any reason why you chose a 1-wire? They are easy to hook up, but you give up some features you would get with a 3 wire setup. Examples are remote voltage sensing and GEN light.
68 Coupe, 350 w/ Edelbrock Performer RPM heads, cam, intake, 700R4, Dave's small body HEI