8 volt battery to replace 6 volt

My mechanic told me that I can replace my 6 volt battery in my Ford Naa with an 8 volt battery for better performance an no negetive effects . Claims the generator puts out 7.5 volts anyway . Any one tried this out ? Think it would work ?
 
If you are going to buy a new battery, just go 12V.

Yes, people have done 8V, results are mixed.
 
Your mechanic says ... "Claims the generator puts out 7.5 volts anyway "

HOWEVER did he tell you it takes at least almost 9 volts to charge that 8.4 volt battery????

Unless a Voltage Regulator (if that's what you have mind you, a cutout acts different) is adjusted up (which is possible), a 6 volt genny with a standard 6 volt voltage regulator WILL NOT KEEP AN 8.4 VOLT BATTERY CHARGED

NEGATIVE EFFECTS???????

YES, the ignition points will burn up sooner and lights (although brighter) will burn up sooner

CAN IT HELP ??????????

YES the starter will turn it over faster improving starting

YES the spark will be somewhat hotter (until the points burn or carbon due to excess current)

NOTES (Before some Billy Bob has a calf)

The Voltage Regulator (if it has one) works different if using a higher voltage battery (such as an 8.4) subject to if it has a separate Voltage Control Relay or if its a combination Voltage and Current Control relay andddddddddd things are different if it just uses a cutout relay. Given the right set of circumstances (VR and type and/or a Cutout Relay only) I have seen a 6 volt genny still charge an 8 volt battery. However if its a VR and if it has a voltage control relay and its NOT adjusted up, then it more then likely will NOT charge an 8 volt battery.

An 8 volt battery is a band aid fix. If it cranks over slow try 0 or 00 Gauge Cables instead.

John T Retired Electrical Engineer
 
We used to do it at our dealership with 6 volt tractors we wanted to get rid of. Works fine IF you can turn up the regulator high enough to make 9 1/2 volts. Some do it fine and some can't. Main problem is this. 8 volt batteries are so expensive - upgrading with a $25 12 volt alternator is cheaper - along with a 12 volt car battery.
 
Youre right, often because the 8 volt battery would run down UNLESS 1) Someone who knew what they were doing 2) Had the right type of a Voltage Regulator and 3) Adjusted it to charge a battery that was actually 8.4 volts.

John T
 
Have to agree with everyone here. and must add. time to find a new mechanic. that one ain't that good!!!
 
"it takes more than 7 volts to keep an 8 volt battery charged."

Sure does, a so called "8 Volt Battery" is actually 8.4 volts, so it takes like 9 to 9+ volts to charge it.

If you use a 6 volt Voltage Regulator it has to (if correct type and adjustable) allow/provide/regulate more field current to the generator in order to increase its output.

Fun chat

John T
 
Every tractor that I have bought that was "converted" from 6 volt to 12 volt the starter would never engage into the starter ring just grind away on the rings teeth. most of the of starters was be on repair when I got the tractor. converting to 12 volt the right way usually cost over $300.00 buying battery, altanator, coil, and converting starter over to 12 volt.
 
I can't ever understand all the hype about converting 6 volt systems to 12 volts. I have a Farmall "H" that I use for mowing. It's 6 volt and I never have any problems with it. A little education on a generator charging system goes a long way. Main thing with a 6 volt generator/regulator system it to make sure the generator and regulator have been polarized the same and that they both have a good connection to the frame of the vehicle. Whether it's a positive or negative ground. Connections are the most important factor. If the connection gets warm during operation it's loose and needs attention. Sure the engine cranks slower on 6 volts but if it starts and runs that's all it's suppose to accomplish. I've never seen the need to convert from 6 volt to 12 volt. I have taken old 6 volt systems and put an alternator on them but put a 6 volt regulator in the alternator. The main reason I've found that people go from 6 to 12 volt with an alternator is that they run in parades and with a generator it won't charge at that low of RPM's. I run my "H" almost full throttle when mowing and this is why my battery stays charged.
 
I think the point is fix the 6V, or go to 12V, the 8V is a bandaid. I go to 12V for convenience, one voltage to worry about and it charges no matter how I use my equipment
 

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