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8 volt battery

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John McGhee

01-30-2005 09:32:09

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Is an 8 volt battery a good replacement for a 6 volt? Is electronic ign. going to be a problem ?Is the 8 volt still positive ground?

Thanks, John

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02-03-2005 05:39:01

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 Re: 8 volt battery in reply to John McGhee, 01-30-2005 09:32:09  
I presume you're talking about AC WD or WD45's?? Our neighbor back home had 3 of them. ONLY used 8volt batterys. I always figured they were built that way. He used 6v on the IH A and WC and 12v on the D-17. As far as electronics. You can do lots of things to correct and adjust things (voltages). It however may not be the best or most cost effective idea though depending on your application.

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Steve in N.J.

01-31-2005 06:29:11

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 Re: 8 volt battery in reply to John McGhee, 01-30-2005 09:32:09  
To answer your question on the Electronic Ignition, if your tractor is equipped with an E.I. I wouldn't install an 8V battery. If your system is 6V Positive Grd. and your E.I is made for that system, adding the 8V could be enough to "spike" the E.I. module and eventually make the module fail. We sell the Pertronix Ignitor E.I. system, and there are certain procedures they recomend for their units. Here's their Tech Line# for precise info- (800-827-3758) As for the 8V battery itself, if you have a higher compression engine where you need the "grunt" to turn it over, go with a 12V conversion. If the engine is stock, it's in the battery connections or starter motor somewhere. HTH

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01-30-2005 19:08:01

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 Re: 8 volt battery in reply to John McGhee, 01-30-2005 09:32:09  
8V may be a good option if you have already checked for poor connections, undersized replacement cables and starter problems. Back when installing a M&W big bore and high compression kit was popular it sometimes had to be done to crank it over. Our WD model with one of those kits just barely gets over and everything is up to snuff. Cant help with the electronic ignition question, I am sure the people who made it can answer that question. Light bulb life will suffer some as will ignition points if so equipped. Install it with the same ground as your 6V system and set the regulator around 9 volts, a little less than 9 will allow for better life of lightbulbs and points but battery life will suffer some.

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01-30-2005 18:45:20

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 Re: 8 volt battery in reply to John McGhee, 01-30-2005 09:32:09  
My father and I installed a 8 volt battery in a Oliver 77,1952 model years ago,approximately 1971.We ran it for years without any problems whatsoever.All we had to do was readjust the voltage regulator to properly charge the battery.We never,ever had to so much as change a bulb.By the way I am now a certified mechanic and work on magnetos,etc.

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01-30-2005 17:14:55

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 Re: 8 volt battery in reply to John McGhee, 01-30-2005 09:32:09  
when you install that 12 volt battery in a six volt system, from that point forward use all of your eletric drills, sanders, air compressor and all lights in your shop and anything else that runs on a c volts, swith all of those things over too 220 volts also. they will last just as long as a 6 volt starter with 12 volts running thru it.

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01-30-2005 22:57:10

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 Re: 8 volt battery in reply to alliswc, 01-30-2005 17:14:55  
Now, that's a STRANGE comment!

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Doug in OR

01-30-2005 10:17:25

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 Re: 8 volt battery in reply to John McGhee, 01-30-2005 09:32:09  
In my opinion, which is worth what you are paying for it, 8 volt batteries are not a good idea for anything. First of all, if starting is the problem, then start by fixing the problem you are having while using 6 volts. The usual culprits are poor battery and cable connections or worse yet, using cables rated for 12 volts on a 6 volt system. Check your charging system too. If it doesn't work on 6 volts, it will be even worse when trying to maintain an 8 volt battery. Think about your stand-alone battery charger too - ones that will work at 8 volts with a flip of the switch are far and few between.

The next issue is the one you already mentioned: compatability. The truth of the matter is, if you are considering going to electronic ignition, just convert the tractor to 12 volts. There are some 6 volt electronic ignition systems available, but once you purchase one, you are locked to a 6 volt system forever - unless you change electronic systems too. I'm not certain, but I'm willing to bet that any electronic ignition supplier will not warranty their ignition system if it is not used at the voltage for which it is rated.

I'm sure other opinions will follow mine which will differ with me, but remember it is your $$$ that will be invested in this. I've always had an easy time telling someone what to do when the money they were spending wasn't mine.

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Texas Denny

01-30-2005 11:08:45

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 Re: 8 volt battery in reply to Doug in OR, 01-30-2005 10:17:25  
I have to mirror Doug's comments. I never did try an 8 volt on a tractor but did buy a 1952 Ford that had one in it. I discarded it after a few months and went back to 6 volts. The previous owner apparently had trouble starting on 6 V because he used 12 volt cables on the battery. I dumped those cables and have had few problems. I didn't like the 8 volt because t put stress on everything in the car - gauges, lights, ignition. I think I got it out before it permanently hurt anything but I'm not sure.

If everyting is right on the 6 volts, it should start the tractor. If it isn't, I'd recommend switching to 12 volt. You can't buy 8 volt ignition or 8 volt bulbs. I say fix the 6 or switch to 12 volt. 8 Volt is a bandaide that won't stick. You can probably get a 12 volt battery, all new bulbs and a dropping resistor (for the ignition) for what you spend getting an 8 volt.

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