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Thread: Alternator providing enough power?

  1. #1
    al
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    Alternator providing enough power?

    My 88 Ford Ranger is pretty barebones, and was bought with no extras (not even a cig lighter! but I put one in since then), so it has a small alternator, but I'm not sure of the exact size. I want to know if my alternator will provide enough juice for my 200W amp and the more major concern, a p75 (motherboard, hd, soundcard, ram) connected through an inverter (12V ac to 120V dc) to the cigarette lighter. If you know please help me out, and if I forgot any valueable information let me know. Thanks a lot!

  2. #2
    Low Bitrate
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    At a guess, you should be prety right. Your player will only draw several amps at most. Assuming youre not one of those people who constantly pumps 200W RMS into their speakers you should be right with that too. I have 2 x 250W RMS amps in my 71 FORD, they are wired straight to the battery, If I crank it right up at night I can see the headlights dim to the beat of the Sub, however normal listening levels have never caused any problems.

  3. #3
    al
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    Older cars tend to have larger alternators, too. I have to convince my dad about this so he will let me do it. How much/fast do CD players draw as compared to a computer? If I knew that, then I could know it would work!

  4. #4
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    Im not a 100% sure but I would say a car CD player would draw les than a couple of amps, a motherboard apparently uses three to four amps itself. I realy don't think you have anything to worry about, however to be sure Im going to put an ammeter in series with my car box tonight (just for interest sake). Ill let you know how it goes a bit later on.

  5. #5
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    If it can't handle it, take your alternator down to your local alternator shop and have them rewind it for a higher output.

    LowLife

  6. #6
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    I hooked an Ammeter in series with my box an to my surprise it only draws a max of 2.6amps, once it has booted up the current draw drops down to 2.35amps. This sort of current draw isn't worth worrying about.
    My system is an overclocked P90 with a 6.4 gig hard drive, a IRman to control it , a 16 x 4 LCD and 16meg RAM.

  7. #7
    al
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    thanks so much, snakebite! that info is really helpful. I appreciate this soo much!

  8. #8
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    if your sound system draws too much power and your headlights dim you can add a capacitor, its just like a power reserve that will keep the power levels constant during that point when peak levels in your sound system draw to much power.
    I don't know about what size to use, I just know that you can use one for that purpose =)

  9. #9
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    I'd use a 1/2 farad. I used a 1/4 for a 200 watt and it didn't help much. 1/2 did the trick for me.
    <A HREF="http://mp3mercury.ghettoware.net[/URL" TARGET=_blank>
    [URL=http://mp3mercury.mp3car.com]http://mp3mercury.mp3car.com</A>

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