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Battery - 6v vs 8v


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#1 Ron K.

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Posted 01 September 2012 - 03:08 PM

My '40 Cabriolet came with an early Lincoln Y block V8 and I am getting close to starting it after over 50 years of storage. It has a Ford 7 volt generator on it and I know that all you will get out of an 8v battery is what you put into it. So, do I gain anything by buying an 8 Volt battery and charging it with a 7v generator? If not, can you Six Volt Purists out there recommend a monster 6 volt battery to crank this beauty?

#2 John Murphy

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Posted 01 September 2012 - 05:05 PM

Ron, What's wrong with the 6 volt Optima battery???? Should work without a problem.

#3 notnow

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Posted 01 September 2012 - 11:54 PM

Ron; I had Antique Auto Batteries build 2 batteries for me.. The first one lasted 7 years and the present one is 4 years old.. They are a long way from You ,their in Hudson Ohio.. They make them the correct size,the correct amperage and also with the correct Logo on them..They are expensive but i'm a Purest and want everything correct .. They also sell Optima Batteries and if you desire they will put the Optima in a regular case so as to make them look like the original Battery ..They have a web site ,look them up !!

#4 larry butcher

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Posted 03 September 2012 - 03:23 PM

My '40 Cabriolet came with an early Lincoln Y block V8 and I am getting close to starting it after over 50 years of storage. It has a Ford 7 volt generator on it and I know that all you will get out of an 8v battery is what you put into it. So, do I gain anything by buying an 8 Volt battery and charging it with a 7v generator? If not, can you Six Volt Purists out there recommend a monster 6 volt battery to crank this beauty?


Ron,
In addition to the replys above, you mentioned the car has been in storage for at least 50 years; therefore YOU MUST CLEAN AND REMAKE EVERY

GROUND CONNECTION IN THE IGNITION AND STARTING CIRCUITS!!!!!! Just because the connections may look good, do them over!

Larry Butcher

#5 Ron K.

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Posted 03 September 2012 - 05:04 PM

Thank you very much Gentlemen, if the Optima is good enough for John, it is good enough for me. Thanks also for the tip on putting it in a fake case that makes it look period correct I did not think about the gauge of the cables or assuring that I have good ground. I sure wish you guys were my neighbors. Can I still use a seven volt generator on a six volt battery or will that cause problems?

Ron

#6 JFranklin

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Posted 03 September 2012 - 10:03 PM

What car ever originally used a 7 volt generator? I have never known one with that type of system.

#7 Ron K.

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Posted 03 September 2012 - 10:41 PM

The ID tag on the generator says that it is a FAB-10000-A, 7 volt, 40 AMPS, FOMOCO, Serial # 47138. It came attached to the 1953 Lincoln V-8 engine and I have to clue to its origin.

Ron

#8 peecher

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Posted 04 September 2012 - 01:04 AM

Ron, that's the correct generator for the 6 volt system on your '53 engine. The 7 volt, 40 amp rating is the maximum out put. The regulator will regulate output according to the condition of the battery, usually at something less than maximum.

#9 Ron K.

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Posted 04 September 2012 - 01:55 PM

You never cease to amaze me peecher, you know some stuff, thanks.

Ron

#10 dandeman

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Posted 23 September 2012 - 02:51 AM

I agree with the others about using an optima battery and the heavy cables and good connections.
However should you decide to use an 8 volt battery, It is necessary to readjust the voltage regulator to 9.2 Volts
even though the tag said 7 volts the generator is capable of a much higher voltage. I'm sure
that the 7 volts refers to what the regulator would be set at on a typical 6 volt system which should be about 7.2 V




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