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drain on battery a problem? 

 

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 Post subject: drain on battery a problem?
Posted: Thu Jul 21, 2005 12:45 am 
Stock as a Rock
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when my car idles it puts out about 13.8 volts (normal) but when i turn the stereo right up it sits at 11.5 volts constantly. could this a problem for the car down the track?
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 Post subject: Re: drain on battery a problem?
Posted: Thu Jul 21, 2005 10:53 pm 
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Ciggy_483 wrote:
when my car idles it puts out about 13.8 volts (normal) but when i turn the stereo right up it sits at 11.5 volts constantly. could this a problem for the car down the track?


Yes it is a problem.
Need a bit more info, what amps? how many?

What size cable to the boot? 0 gauge? 4 gauge?

 

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Posted: Thu Jul 21, 2005 11:06 pm 
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i've got 2 400w clarion amps, one runs my speakers, one my sub. the power cable is preety thick but i'm not sure what guage. does this help?
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Posted: Fri Jul 22, 2005 12:57 am 
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First of all where are you taking the reading at the boot or at the battery? if there is a large drop at the boot its either bad connections or you need a lower guage cable to carry the amps (less voltage drop)
If the drop is at the battery it self i would be looking into a new or larger altenator, also renewing the battery depending on its condition.
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