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How many amps does your alternator pull?


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Posted

I fried my alternator a couple of weeks ago after it's been tortured and now it's time for a new one, the only one that I can afford and in stock is a Durlast 80 amp Alt. I'm running 2 12's(800rms/1600w) on a alpine mrp-m500(500rms/1000w), I'm wondering with if it'll pull too much or dim the shit out of my lights. Also, What should my voltmeter be reading?

Posted

that Alpine isn't pulling that much. But i'd still say save up to get a good alternator. That way you dont have the same problem. ( & for future upgrades ) When the car is on it should read about 14.4v while off 12.3v ish.

Posted

The spec's of your subs don't matter, but for a 500 watt rms amp you should be fine on 80 amps. And it depends on whats going on in your car as to what your volt meter should read also depends on your battery and if it's junk or not. but anywhere from 14.4 to 12.6 I guess. But thats just a guess, if it gets to 11 or even close to 10 you gots issues.

Posted

that Alpine isn't pulling that much. But i'd still say save up to get a good alternator. That way you dont have the same problem. ( & for future upgrades ) When the car is on it should read about 14.4v while off 12.3v ish.

And when I say tortured, I mean when I first got the car. My belt kept getting loose constantly for a month till I fixed the mount, ran 8g wire, and the alternator hasn't been replaced since 2002...

Posted

The spec's of your subs don't matter, but for a 500 watt rms amp you should be fine on 80 amps. And it depends on whats going on in your car as to what your volt meter should read also depends on your battery and if it's junk or not. but anywhere from 14.4 to 12.6 I guess. But thats just a guess, if it gets to 11 or even close to 10 you gots issues.

My brother works at a part store, I'm scoring a battery for $49(half off on everything) so hopefully it'll do some good.

Posted

do big 3

CURRENT SYSTEM:

  • Alternator:
    1. Stock alt on mids/highs
    2. Isolated DC Power 270 SP - Charging @ 16.8v
  • Batteries: (2) XS D1400s
  • Power Cable: Double Runs of 1/0 KNU Kolossus Fleks
  • Headunit: 80-PRS
  • Sub Amp: DC 5.0k
  • Subwoofers: 2 RE MT 15s /PSI dual .7ohm recones
  • Subwoofer Enclosure: 9.1cubes @ 32hz - brutal.
  • Mids & Highs Amp: CT125.4
  • Active Components:
    • Mids RE XXX 6.5c
    • Highs - 3 RE XXX tweeters per side(A pillar)
  • Noise Control: Damplifier Pro all over the cab.

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Posted

I don't think alts PULL power. I think they MAKE power.

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////Alpine, Eclipse, Load Boss, Pheonix Gold, MB Quart,Digital Desings, Memphis, Stinger, Periphial, MTX, Visualogic

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