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11-11-2019, 11:44 AM | #21 |
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Re: 8 volt battery in 6 volt car
Click on his name and it brings up more videos.Not all about Model As but 'interesting'.
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The Master Cylinder Enjoying life at the beach in SoCal... Last edited by The Master Cylinder; 11-11-2019 at 11:51 AM. |
11-11-2019, 12:05 PM | #22 |
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Re: 8 volt battery in 6 volt car
What an idiot that guy is.
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11-11-2019, 12:13 PM | #23 |
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Re: 8 volt battery in 6 volt car
I ask the same question awhile back. The replies were a resounding DON’T DO IT!
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11-11-2019, 12:23 PM | #24 |
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Location: Walla Walla, WA
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Re: 8 volt battery in 6 volt car
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11-11-2019, 03:32 PM | #25 |
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Location: Long Island NY
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Re: 8 volt battery in 6 volt car
I am just looking for a knowledge based cause and effect of this set up has on the various electrical components of a Model A.
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11-12-2019, 01:19 PM | #26 |
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Location: Farmington MI
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Re: 8 volt battery in 6 volt car
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Joe B 31 Coupe |
11-12-2019, 02:56 PM | #27 |
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Re: 8 volt battery in 6 volt car
Millions of Model A's (and later v-8's) were built and ran very happily on 6 volts. It ain't broke!! It doesn't need to be fixed!! Going to higher voltages masks problems. It doesn't fix them.
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11-12-2019, 05:04 PM | #28 |
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Re: 8 volt battery in 6 volt car
I would have to say, stick with 6 V, clean all your connections, make sure your battery cables are good, and it’ll crank over like crazy. In my opinion eight volts is just a Band-Aid fix to cover up another problem.
PS. I’m going to install a bolt in my vacuum port to adjust my timing. |
11-12-2019, 05:20 PM | #29 |
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Re: 8 volt battery in 6 volt car
In my opinion, converting to 8 volts is either a band-aid or it is dinking with something that ain't broke just for the sake of doing it.
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11-12-2019, 05:21 PM | #30 |
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Re: 8 volt battery in 6 volt car
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11-12-2019, 10:54 PM | #31 |
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Re: 8 volt battery in 6 volt car
Think of using an 8v battery as the 6V components have to run at voltage and power d1ssapation up to 25 % more than they were rated for. Example - the starter spins faster with more power and the bendix smacks into the flywheel with more force - can it take it? Maybe or maybe not, but they were not designed for the extra force.
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11-13-2019, 07:59 AM | #32 |
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Re: 8 volt battery in 6 volt car
Were 6 and 8 volt bulbs marketed separately? This has got me to thinking,I have some NOS bulbs,and they are marked 6-8 volt.I have an old Tung-Sol bulb display,that just says 6-8 volt also.While I've never actually looked,I can't recall seeing any 8 volt specific bulbs.I have a big Marquett battery charger,I know it says 6-8 volt on the tag so I gave it another look.there is no switch for the 6 or 8 volt.I drove a 50 Ford pickup for a couple of years that had an 8 volt battery in it.An old mechanic told me that if I took the time to check I would probably find that the battery was being maintained at 6 volts by the stock charging system.He said the 8 volt battery was most likely a feel-good thing by the previous owner.
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11-13-2019, 09:46 AM | #33 |
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Join Date: Dec 2017
Location: Guthrie, OK
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Re: 8 volt battery in 6 volt car
I suspect the 6-8V spec was a feel-good thing pushed by Edison and Westinghouse. They're 6V bulbs. Obviously, running them consistently at 8V will shorten their life.
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11-13-2019, 11:01 AM | #34 |
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Join Date: Aug 2011
Location: Eagle Bend, MN
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Re: 8 volt battery in 6 volt car
If you want to run an 8 volt battery its simple enough to build a 2 volt voltage reducer with 3 power diodes in series. Check the maximum current draw, then use diodes that are rated for at least double that. Ex: 70 amp diodes are about $5 each on ebay. I don't see any need myself to use anything besides 6V but if its your car, do as you want. Maybe if you have a leaky carb the 8 volt battery will seal it up?
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11-13-2019, 04:28 PM | #35 |
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Location: Walla Walla, WA
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Re: 8 volt battery in 6 volt car
We buy all these neat old cars and want to experience the unique-ness of having a Model A. Isn't it kind of baffling that one of the first things many of us want to do is mess with some of the basic parts?
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11-23-2019, 10:26 AM | #36 |
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Location: Sunrise Beach, Mo
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Re: 8 volt battery in 6 volt car
I have used an 8 volt battery on an old 6 volt tractor, just because it was an easy choice to keep the tractor starting well. But on a Model A, considering, there is a reason 6 volts is not doing the job. I would venture the light bulbs will take the extra voltage but, my choice on my model A would be to figure out why 6 volts was not functioning right. Got a lot investing this ole girl and 6 volts should work.
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11-23-2019, 12:02 PM | #37 |
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Location: Alabama
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Re: 8 volt battery in 6 volt car
Six volts will work , there really doesn't have to be a problem . There is such a thing as an improvement . My reason for setting up my roadster on twelve volts was that I p[refer a more powerful twelve volt system for the same reasons that most vehicles changed to twelve volts over sixty years ago .
Twelve volt bulbs are readily available . I have NEVER had a problem with the original MODEL A generator or starter when used on twelve volts . I run mine positive ground and no wires will need to be changed or reversed . The biggest thing is installing a twelve volt battery and either using a three OHM coil or installing a resister at the six volt coil . I am now using the Fun Projects twelve volt can style voltage regulator with good results . I have also used the original type cut out on twelve volts . My repro horn blows strong enough on twelve volt to be a good warning device when needed Most six volt accessories will need a voltage resister . If a person wants to run negative ground It will be necessary toi reverse the wire connections at the ammeter and the coil . Of course the battery will also need to be hooked up negative ground . |
11-23-2019, 12:09 PM | #38 | |
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Re: 8 volt battery in 6 volt car
Quote:
If you get a chance, check out the book "Those Wonderful Unauthorized Accessories for the Model A Ford". https://www.snydersantiqueauto.com/P.../model-a-books Fun read. Last edited by Y-Blockhead; 11-23-2019 at 12:16 PM. |
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11-23-2019, 12:53 PM | #39 |
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Re: 8 volt battery in 6 volt car
I've got a 40 coupe, still 6 volt, hi-comp heads, dual 97's, headers, electronic ign., a proper grp 2 battery. Spins over just fine ! !
I cleaned ALL the grounds and cables and added another ground strap from the intake to body ground. No problems. FWIW 8V is a bandaid. JMO Paul in CT |
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