The Ford Barn - 8BA gen size

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Harold Degand

04-14-2026 01:11 PM

8BA gen size

1 Attachment(s)

Hi.

My French flathead is originally equipped with a 5 1/8 in 24volt gen.

I want to fit a more common 12v gen.

What is the diameter of an 8BA generator ?

47topless

04-14-2026 01:38 PM

Re: 8BA gen size

24v ?

petehoovie

04-14-2026 01:42 PM

Re: 8BA gen size

Quote:

Originally Posted by Harold Degand (Post 2447056)

Hi.

My French flathead is originally equipped with a 5 1/8 in 24volt gen.

I want to fit a more common 12v gen.

What is the diameter of an 8BA generator ?

https://www.fordbarn.com/forum/attac...7&d=1776190213

ndnchf

04-14-2026 02:08 PM

Re: 8BA gen size

Stock 8ba generator is 4.850" diameter.

Harold Degand

04-14-2026 02:18 PM

Re: 8BA gen size

Quote:

Originally Posted by 47topless (Post 2447063)

24v ?

Yes, those engines come from military trucks

cas3	04-14-2026 04:50 PM

Re: 8BA gen size

In WW2 jeeps were 6v, some trucks were 12v, and big stuff was 24 volt. So, after that they got smart and made everything 24 volt , so a jeep could jump a tank, all bulbs are the same, and even dashboards interchange.

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