The Ford Barn

Rockymountainsparky · 05-01-2024, 10:36 PM

Has anyone used the group 25 Optima red top 12 volt battery in a 36 coupe? I've seen several threads saying an optima will fit in the stock artery box below the floor. I'm converting to 12 volts and am hoping that this will work.

koates · 05-02-2024, 04:37 AM

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The only optima battery that will maybe fit inside an original 6 volt hard rubber battery case is the 6 volt optima which is half the size of a 12 volt optima. So why do you need to change to a 12 volt system ? The original 6 volt system is all good as long as all components are in good condition. Are you having some sort of problem with your electrics . Regards, Kevin.

05-01-2024, 10:36 PM	#1
Rockymountainsparky Member Join Date: Jun 2023 Posts: 36	12 volt Optima red top group 25 in a 36 coupe Has anyone used the group 25 Optima red top 12 volt battery in a 36 coupe? I've seen several threads saying an optima will fit in the stock artery box below the floor. I'm converting to 12 volts and am hoping that this will work.

05-02-2024, 04:37 AM	#2
koates Senior Member Join Date: May 2010 Location: Melbourne Australia. Posts: 2,082	Re: 12 volt Optima red top group 25 in a 36 coupe Sponsored Links (Register now to hide all advertisements) The only optima battery that will maybe fit inside an original 6 volt hard rubber battery case is the 6 volt optima which is half the size of a 12 volt optima. So why do you need to change to a 12 volt system ? The original 6 volt system is all good as long as all components are in good condition. Are you having some sort of problem with your electrics . Regards, Kevin.