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Old 04-08-2008, 07:42 AM   #1
my70chevyc10
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Talking new alt and reg

I just instaled a new alternator and regulator to night and i want to know how much volts it should be charging. just the battery reads 12.5 to 13 volts but when i start the truck it reads 15 to 16 volts charging and i want to know if thats to high.
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Old 04-08-2008, 09:12 AM   #2
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Re: new alt and reg

The voltage is too high, it should be about 14 to 14.3. What are you using to measure the voltage? Why did you swap out the regulator and the alternator in the first place?

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Old 04-08-2008, 12:28 PM   #3
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Re: new alt and reg

in all reality, yoiu should consider getting a unit with the internal regulator. There's about eleventy billion threads here showing how ti do it, but the regulator in the later model altenators are simply better, and there's a higher amp rating, and it gives way more power at low RPMS.
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Old 04-08-2008, 02:16 PM   #4
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Re: new alt and reg

i like t see between 14-15 volt here check out this swap
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Old 04-08-2008, 02:58 PM   #5
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Re: new alt and reg

Quote:
Originally Posted by Longhorn Man View Post
in all reality, yoiu should consider getting a unit with the internal regulator. There's about eleventy billion threads here showing how ti do it, but the regulator in the later model altenators are simply better, and there's a higher amp rating, and it gives way more power at low RPMS.
I like that..... "eleventy billion".....I guess that means "a lot" huh?
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Old 04-08-2008, 03:22 PM   #6
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Re: new alt and reg

Quote:
Originally Posted by truckdude239 View Post
i like t see between 14-15 volt here check out this swap
Great link!
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Old 04-08-2008, 10:53 PM   #7
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Re: new alt and reg

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Originally Posted by 70GMCer View Post
I like that..... "eleventy billion".....I guess that means "a lot" huh?
yep... a whole bunch.
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Old 04-08-2008, 11:45 PM   #8
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Re: new alt and reg

you should also make sure you have a good ground from the rad support to the frame rail for proper operation of the regulator
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Old 04-09-2008, 02:53 AM   #9
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Re: new alt and reg

When you check for the reading it should be after it's warmed up. At idle it should read around 12 1/2 to 13 volts. At fast idle around 14. I think it's 2500 RPM'S.
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Old 04-09-2008, 03:42 AM   #10
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Re: new alt and reg

Mine reads 15.25 volts at about 2000 RPMs, always has..
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