leomara Posted April 27 Share Posted April 27 I own a Model A Ford and it has a 6 Volt Group 1 battery. I'm currently working on a 1928 Chrysler Model 72 and since it is a larger car with a larger engine I was wondering if a Group 1 battery would work or should I look for something larger. Is anything larger even available anymore? Link to comment Share on other sites More sharing options...
Frank DuVal Posted April 27 Share Posted April 27 https://www.batteryequivalents.com/bci-battery-group-size-chart.html#battery-groups-sizes-chart I see the group 2 battery is slightly bigger. This chart is great for finding common modern available sizes for older vehicles, like a replacement for a group 60 or 53. Link to comment Share on other sites More sharing options...
leomara Posted April 27 Author Share Posted April 27 Where do you go to get a 6 volt battery that is not a Group 1? Link to comment Share on other sites More sharing options...
studeboy Posted April 27 Share Posted April 27 Go to a tractor dealer. John Deere sells them. Might have to order it but they usually can have them in a couple days. Link to comment Share on other sites More sharing options...
bob staehle Posted April 27 Share Posted April 27 I just bought a 6 volt group 2 battery from batteries plus 1 Link to comment Share on other sites More sharing options...
PFitz Posted April 28 Share Posted April 28 I get my 6 volt batteries from Interstate Battery dealer or Interstate warehouse. Usually, the big group 4 xhd 1000cca used in many 20's and 30's cars. Paul Link to comment Share on other sites More sharing options...
hook Posted April 28 Share Posted April 28 Tractor Supply Company. www.tractorsupply.com Link to comment Share on other sites More sharing options...
RonDup Posted April 28 Share Posted April 28 My dad had a Ford tractor with an industrial 6 cylinder engine in it. It always had starting problems with a group 1 battery. After he passed, I restored the tractor and was determined to improve the starting. I found that the group 2 batteries had little improvement in starting ability over the group 1. The group 4 battery was quite a bit longer, but had a world of difference in starting ability, both in terms of cranking speed, and the amount of time it could crank the engine. Link to comment Share on other sites More sharing options...
PFitz Posted April 28 Share Posted April 28 3 hours ago, RonDup said: My dad had a Ford tractor with an industrial 6 cylinder engine in it. It always had starting problems with a group 1 battery. After he passed, I restored the tractor and was determined to improve the starting. I found that the group 2 batteries had little improvement in starting ability over the group 1. The group 4 battery was quite a bit longer, but had a world of difference in starting ability, both in terms of cranking speed, and the amount of time it could crank the engine. I often find a smaller group-sized battery in customer's cars that are slow to start or having problems starting at all. The battery trays are made for a group 4 size battery but they put in a smaller 6 volt and then blame the problem on it being a 6 volt system. Plus, the smaller battery bounces around in the tray sometimes causing loose terminal connections. Instead of giving in to their wish of switching to 12 battery system I talk them into a group 4 battery and bingo, the starting problems are gone. You'd think that being guys they would understand that size does matter. 😁 Paul 2 Link to comment Share on other sites More sharing options...
Frank DuVal Posted April 28 Share Posted April 28 1 hour ago, PFitz said: Plus, the smaller battery bounces around in the tray sometimes causing loose terminal connections. Not only loose external terminals, but INTERNAL connection too! And the debris that should stay on the bottom of the battery now gets shaken up into the plates. Always secure a lead acid battery.👍 1 Link to comment Share on other sites More sharing options...
PFitz Posted April 28 Share Posted April 28 And when a terminal comes loose it's a good way the damage a generator or at least get a surge that welds the ignition points closed. Paul Link to comment Share on other sites More sharing options...
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