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Northstar Engines and System Technical Discussion Discussion, Alternator in Cadillac Engine Technical Discussion; I have a 2000 STS and I would like to know how big of an alternator my car has, the ...
  1. #1
    KORCA is offline Cadillac Owners Member
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    Alternator

    I have a 2000 STS and I would like to know how big of an alternator my car has, the reason being i am putting a sound system in there. If someone knows let me know. Thanks.

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  3. #2
    lisekpl's Avatar
    lisekpl is offline Cadillac Owners Fanatic
    Automobile(s): 1996 STS
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    Re: Alternator

    140 amp

  4. #3
    KORCA is offline Cadillac Owners Member
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    Thread Starter

    Re: Alternator

    k thanks

  5. #4
    Submariner409's Avatar
    Submariner409 is offline If it won't run, install a sound system
    Automobile(s): 2002.5 F55 STS/65500mi, 2004 Ford F150 SuperCab4x4
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    Re: Alternator

    If you're going to install one or more amps with switch-mode power supplies in order to drive a couple of ghetto woofers, you might consider installing a second battery in parallel with the original. Amps generate quick power demand changes, and the alternator/regulator alone can't keep up with the additional load. You should also install a high amperage isolation switch in the hot paralleling jumper. Use cable at least the same size as your present battery cable, and use good, stranded power feed wire, fused, at least the size recommended by the amp manufacturer. Marine stores are a source for all sorts of good wire, connectors, and switches. Remember that paralleled batteries, especially if they're different in rating, will tend to discharge each other over time if left connected with the car "off". Use the isolation switch if you leave the car for more than 3 - 4 days. (Need any vacuum tubes? I have thousands of 'em)

  6. #5
    MachX's Avatar
    MachX is offline Cadillac Owners Fanatic
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    Re: Alternator

    you don't need dual batteries, aren't capacitors made specifically to handle those peaks?

  7. #6
    Submariner409's Avatar
    Submariner409 is offline If it won't run, install a sound system
    Automobile(s): 2002.5 F55 STS/65500mi, 2004 Ford F150 SuperCab4x4
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    Re: Alternator

    Capacitor banks are great for instantaneous drains, but they have to recharge also, probably from a switching power supply. The second battery supplies the amperage to maintain power supply voltage. Years ago, I ran a PAIR of Hafler DH500 amps in a home stereo system, and even though the Haflers each had 4 huge power supply capacitors I could flicker and dim the room lights because I was overloading the 110V circuit. The solution was a second, dedicated circuit.

  8. #7
    bmckee27 is offline Cadillac Owners Member
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    Re: Alternator

    I think is is a 140 amp thats what my 2003 STS has. you need about 180 or 200 amp that will handle anything you want

  9. #8
    caddy strophic's Avatar
    caddy strophic is offline Cadillac Owners Member
    Automobile(s): Cadillac deville
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    Re: Alternator

    i read somewhere about limo alternators. anyone know where i can find one online? for a 2000 deville

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