How much voltage does an alternator produce at 2000 rpm?
How much voltage does an alternator produce at 2000 rpm? A small car alternator is rated about a 60 amps maximum. At about 2000 rpm the alternator produces about half this maximum, so at engine idle the alternator is charging well. Efficiency peaks at around 3000rpm, ie 50 amps, and will only give small increases over this, regardless of the rpm. What should the amperage be on a Ford alternator? Ford has alternators with external fans as well as internal. They also have internal and external regulators. The amperage ranges from 90 to 215 amps. Alternators should always charge the...