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Thread: power sags

  1. #1
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    power sags

    i have a 1000wat amp and 500watt amp running from my standard battery Wreg peugeot 206 1.1, After 10-15 mins of music on loud the lights start dipping and the car's power sags, what could i do to sort this would it be best to uprate the alternator or buy a bigger battery? also could i fit another battery under bonnet as a back up that the sound system can run from cheers

  2. #2
    Neither darque nor pervert DarquePervert's Avatar
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    Those are both options that I think will help.
    A capacitor will also help.
    Have you looked in the FAQ yet?
    How about the Wiki?



    Under normal circumstances, a signature would go here.

  3. #3
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    Upgrade your battery to chasis ground. It makes no sense to have a 8ga and a 4 ga wire coming from the pos. and just one 8 ga going to the neg. IMO

    Alternator upgrades can be very expensive but would more then likely do the trick.

    I would recommend a optima, they're great batteries and do help some. A new battery won't be a cure all though.

    hope that helps

  4. #4
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    I wouldn't hope on capacitor.
    Grond wire was the first upgrade that I made to my Pug 206 as It had similar problems. And guess what, it made things alot better. Not that the problem disappeared at all, but still alot better than it was before. If possible, upgrade the wire that connects the alternator to the battery. And change the battery if it is still not as good as you would wish.

  5. #5
    Banned GuessWhosBack's Avatar
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    if it starts off fine, then after 10 minutes gets bad, then you need a bigger alternator, as its not supplying enough current, and the battery is getting discharged

    you may be able to get the stock alternator rewound for more current for a few hundred bux...

    look into it

  6. #6
    Low Bitrate keen70's Avatar
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    a capacitor will not help...it makes it worse.
    only solution is a high output alternator, for ur system i would reccomend 150 amps or more
    try www.excessiveamperage.com

  7. #7
    Low Bitrate keen70's Avatar
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    Quote Originally Posted by xtraxmechx
    Upgrade your battery to chasis ground. It makes no sense to have a 8ga and a 4 ga wire coming from the pos. and just one 8 ga going to the neg. IMO

    Alternator upgrades can be very expensive but would more then likely do the trick.

    I would recommend a optima, they're great batteries and do help some. A new battery won't be a cure all though.

    hope that helps
    make sure if its the optima...make sure its the yellow top cause the red and orange tops provide High Cranking Amps and no deep cycle
    yellow tops provide good cranking amps and take a hella long time to discharge completly

  8. #8
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    you should first check all of your wiring. Make sure you have adequate wiring...same guage if not larger on the negative as what's on the positive. Make sure you are using the right size wire in the first place.

    IF you are using inadequate wire size, you may be able to lessen the problem.

    However, the symptoms indicate that your alternator isn't adequately sized. Sure, a battery couldn't hurt, but this issue seems to go beyond the battery.

    What is the total amperage of your amplifiers? What gauge power and ground wires are you using? What is the amperage rating on your alternator?
    Jan Bennett
    FS: VW MKIV Bezel for 8" Lilliput - 95% Finished

    Please post on the forums! Chances are, someone else has or will have the same questions as you!

  9. #9
    FLAC
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    Im betting on inproper install. What are the make and model number of these amps?

  10. #10
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    1.1 - is that the size of the motor in that car?

    if that's the case...there's NO way you have stock alternator that can keep up with your demand...

    also, 1000watts/500watts doesn't mean crap, tell us the specifics of the amplifiers...

    there's also a damn good chance that you have a TINY battery in that car as well...

    sounds like if you want to have any kind of serious stereo, you're going to need a new car....lol

    Jan Bennett
    FS: VW MKIV Bezel for 8" Lilliput - 95% Finished

    Please post on the forums! Chances are, someone else has or will have the same questions as you!

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