does your RPMS drop when your idling?

[Alpine CDA-9815 10+ year member]

oh, and another thing, HO alts are NOT the alternators to be getting. HO alts make the power they do at high rpms and high rpms only, if you are sitting at idle they wil actually make less power than your average stock alt. The best thing to find is just a regular alternator designed to produce large amounts of amperage over a broad rpms range(like an ambulance alternator) but not designed as HO alts.

Really that's why my HO on my truck put out over 100 amps at idle when we tested it. You just have to make sure the HO alt will make more power at idle, some wont. I haven't tested the new HO alt I got from my car, but it shold be making around 120 at idle, and 200 amps around 1800-2100 RPM's.

 

[drkodin 10+ year member]

Really that's why my HO on my truck put out over 100 amps at idle when we tested it. You just have to make sure the HO alt will make more power at idle, some wont. I haven't tested the new HO alt I got from my car, but it shold be making around 120 at idle, and 200 amps around 1800-2100 RPM's.

that is exactly what i was reccomending. i didn't know correct terms, but i was describing your alt like the ambulance alt, meaning a large output at all rpms. if you go to a store and ask for a HO alt it will have low output at low rpms, and extreme output at high rpms.