High Output Alternator Question - Please Help!

[dj2perzyk]

Quick question, I am currently looking at two high output alternators for my vehicle, a 200amp and a 250amp. I have been told the 200amp will do more at idle (about 800-900rpm). is this true? I figured under the same theoretical load at the same rpms, the 250amp would do a little more power. Please enlighten me! Thanks!

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[Side Show 10+ year member]

some alts don't actually start charging intil your doing like 2000rpm or higher.

 

[dj2perzyk]

what would be a workaround for that? if there is one?

 

[mylows10 5,000+ posts]

What brand alts ? In a normal situation. The bigger alt would put out more at idle than the smaller amped one.

 

[dj2perzyk]

that's what I always thought. it will be a completely rebuilt one from a local shop that has done work for me before.