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Is my alternator overcharging?

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Old Feb 1, 2005 | 11:17 AM
  #1  
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Default Is my alternator overcharging?

Does anybody know what the charging range should be for the stock alternator? I was told that on the typical automobile it is 12.5 - 13.5 volts. While driving down the road or parked mine is charging at 14 volts. I had a battery boil over and leak acid everywhere a few days ago so, I replaced it with an Optima Red Top and I don't want it to have problems as well. Thanks.
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Old Feb 1, 2005 | 11:29 AM
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If you over charge an optima, it will start to whistle out the vent tube... (dont ask me how I know this)

VR
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Old Feb 1, 2005 | 11:35 AM
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I've had an optima Red Top for a couple of years now and consistently run at 14.1. I have never had electrical problems.

I have an ASP Underdrive pulley although I am sure that has no effect on the 14.1 number.

It sounds like your charging fine to me.


Hope this helps.

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Old Feb 1, 2005 | 11:35 AM
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14 can show for a while but not constantly.
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Old Feb 1, 2005 | 12:05 PM
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Originally Posted by AnteVenom
I've had an optima Red Top for a couple of years now and consistently run at 14.1. I have never had electrical problems.

I have an ASP Underdrive pulley although I am sure that has no effect on the 14.1 number.

It sounds like your charging fine to me.


Hope this helps.

same to me....
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Old Feb 1, 2005 | 01:06 PM
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There was a post on here earlier today with some good charging info.

Here is the link:

http://forums.corvetteforum.com/show....php?t=1005346
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Old Feb 1, 2005 | 01:15 PM
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Anything at or over 14.7 Volts is overcharging and will cause the battery to overheat and boil electrolyte. (Measured at the battery terminals)
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Old Feb 1, 2005 | 01:15 PM
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You can also tell if your battery is bad by the DIC. After re-charging my battery, which was bad, the DIC kept reading all over the place while I was driving. Once I changed batteries it settled right in at between 13.8 and 14.2, while driving.
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Old Feb 1, 2005 | 07:00 PM
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Thanks for the feedback everybody. I will rest easier tonight.
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Old Feb 1, 2005 | 09:16 PM
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Funny that no one mention the "charging sytem fault" which is the most sensitive aspect of the discreate alternator circuit.
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