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Username Post: High voltage        (Topic#358527)
widall2 
Poster
Posts: 47

Reg: 01-04-09
10-21-19 03:21 AM - Post#2778379    

I recently had to replace both the generator and regulator on my 1955 Chevy.The brushes on the generator had worn out and the regulator with the replacement generator only allowed it to charge about 10 amps but at about 13 volts. When I replaced the regulator I now get about 30 amps for a few minutes then down to about 2 amps however after about 2000 RPM the volts are at 15. I am concerned that this will shorten the life of lights and points. I would appreciate any comments. Is this a problem? If so how can I correct without a new regulator or switching to an alternator? Thanks in advance.



 


Shepherd 
Frequent Contributor
Posts: 1862

Loc: Lake George, NY
Reg: 11-11-15
10-21-19 04:27 AM - Post#2778382    
    In response to widall2

What gage are you using to check the voltage?



 
beagrizzly 
"11th Year" Gold Supporting Member
Posts: 2095
beagrizzly
Age: 69
Loc: south texas
Reg: 08-04-12
10-21-19 08:37 AM - Post#2778412    
    In response to widall2

running 30 amps for a few minutes is perfectly normal. You are replacing the juice that you used starting the car.
If it is tapering off after a few minutes, again this is normal. You have replaced the juice you used with the start motor, now all you are needing is the juice to run the ignition, radio, etc.
I would personally install a volt meter. It will give you a better overall picture of what is happening with the electrical system.

One problem with the whole ammeter thing is that ALL of the amperage being used comes through the ammeter. Any loose wires, bad connection, corrosion on those terminals can cause a lot of gremlins.

There's about 2 cents worth.

Griff

if you're gonna be a bear..................

1960 Biscayne (the 6T)
2005 Yukon XL
2007 GMC Sierra Classic 8.1
2009 Silverado
2011 Escalade ESV


 
2blu52 
"18th Year" Silver Supporting Member
Posts: 19027
2blu52
Age: 86
Loc: Montana
Reg: 03-12-02
10-21-19 01:33 PM - Post#2778444    
    In response to beagrizzly

And a well spent two cents it is!

"PEACE IS THAT GLORIOUS MOMENT IN HISTORY WHEN EVERY ONE STANDS AROUND RELOADING"

THOMAS JEFFERSON


 
widall2 
Poster
Posts: 47

Reg: 01-04-09
10-22-19 03:59 AM - Post#2778491    
    In response to beagrizzly

Thanks for the reply. I do have both a volt meter and an amp meter also a warning light. My concern is the 15 volts other than running at about 13 volts. Will this shorten the life of the light bulbs, coil, points, etc. ?



 
widall2 
Poster
Posts: 47

Reg: 01-04-09
10-22-19 06:55 AM - Post#2778503    
    In response to Shepherd

I am using an aftermarket gauge for voltage along with an amp meter and temperature gauge mounter under the dash. I do not recall the company that made the gauges.




 
beagrizzly 
"11th Year" Gold Supporting Member
Posts: 2095
beagrizzly
Age: 69
Loc: south texas
Reg: 08-04-12
10-24-19 05:16 AM - Post#2778658    
    In response to widall2

Again, I think you are concerned about normal operation.

A fully charged battery holds 2.2 volts per cell. Six cells gives you 13.2 volts total.

It takes more than 13 volts to charge to 13.2. Hence the 15 volts. A digital gauge will probably tell you that you have 14.7 charging instead of the 15 showing on your volt meter. 14.7 is the standard charge rate for a "12 volt" battery.

My two pennies again.
I am now up to 4 cents worth of advice here.
Don't spend it all in one place.

Griff

if you're gonna be a bear..................

1960 Biscayne (the 6T)
2005 Yukon XL
2007 GMC Sierra Classic 8.1
2009 Silverado
2011 Escalade ESV


 
Mel Foye 
*VIP* Founding Member
Posts: 4904
Mel Foye
Reg: 09-29-00
10-25-19 04:06 PM - Post#2778760    
    In response to beagrizzly

From Southern California Mel to Southern Texas Griff.
So are you saying: If you only need 20 amps after the battery gets recharged you may not have needed to pay big bucks for that 140 amp alternator!!
The charging system is like your boss's hostile daughter who only puts out that which is needed to keep things going. This is not--A No Double Meaning Zone.



 


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