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1950 Ford 8n - 6 volt vs 8 volt battery

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Doug Grant

05-02-2006 12:23:02

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Thinking of replacing the 6 volt battery with a 8 volt battery.

- Is it worth doing?
- Do I have to tinker with the electrical system if going to 8 volts, e.g. adjust the voltage regulator?
- I live in Ontario, Canada. Any suggesting on a good make of battery?


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Bruce (VA)

05-02-2006 17:48:08

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 Re: 1950 Ford 8n - 6 volt vs 8 volt battery in reply to Doug Grant, 05-02-2006 12:23:02  
I think you would be wasting your time & money. A well tuned N with clean connections, correct cables, a charged battery & average compression will start fine on 6v even in your cold Canadian winters. I'd make sure you have a fully charged battery, large 1/0 guage battery cables & clean, bright & tight connections. While the old v/r's could be adjusted to put out more voltage to charge the 8v battery, many of the new ones can not be accuratly adjusted to do that. And.....bottom line....even if you can adjust it, your point life will suffer.

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05-02-2006 13:19:33

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 Re: 1950 Ford 8n - 6 volt vs 8 volt battery in reply to Doug Grant, 05-02-2006 12:23:02  
To me useing an 8 volt battery is just a bandade fix to get around other problems at best. If you want to have things work better go with a 12 volt convertion and be done with it. One big problem is how to charge an 8 volt battery if/when it goes dead. Also its harder on the points and coil.

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Ken Crisman

05-02-2006 12:50:14

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 Re: 1950 Ford 8n - 6 volt vs 8 volt battery in reply to Doug Grant, 05-02-2006 12:23:02  
I say go for the 8 volt battery . Just make sure you get an experienced auto electrical shop to tweak the voltage regulator . I disagree with the guy saying it shortens the points . I changed my 640 over to 8 volt about 6 yrs ago . i have only had to replace 1 headlite so far . I just replaced the battery a couple months ago .So , I feel I got good service from it . Also the lighting is so much briter . God Bless , Ken

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05-02-2006 13:02:05

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 Re: 1950 Ford 8n - 6 volt vs 8 volt battery in reply to Ken Crisman, 05-02-2006 12:50:14  
Well, Ken, there's all kinds of folks on here who don't seem to get very good point life on "6-Volts", and "8-Volts" will only increase the current on the points.

In our ag area, there used to be LOTS of old farm trucks with 8-Volt batteries, so they'd start when the were HOT, and it seemed we were replacing more points than I thought was normal, on some of those old trucks, and I don't see the "N", with it's notoriously finicky coil as being any different.

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05-02-2006 12:31:32

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 Re: 1950 Ford 8n - 6 volt vs 8 volt battery in reply to Doug Grant, 05-02-2006 12:23:02  
To keep the 8-Volt battery properly charged, the voltage regulator should be "tweaked", and the extra voltage will shorten breaker point and coil life. Do you know how to set the regulator up a bit, or is there in old-time auto-electric shop nearby that would be familiar with it? (An "8-Volt" battery will charge at about 9.8 Volts.)

That being said, lots of old tractors are running around, more or less succesfully with 8-Volt batteries.

If it were mine, I'd clean and tighten all connections, making sure the battery cables are of adequate size, and keep it as-original, 6-Volt.

Check to be sure the generator is putting out about 7.4 Volts, after it's run a while, revved a bit above idle.

Or, if you really feel the need for lots of cranking speed, make the changes necessary, and convert it over to 12-Volts.

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