The Ford Barn

Y-Blockhead · 10-13-2023, 08:23 PM

Hi all, I'm asking for a friend. He has a '30 Ford Woodie with a '37 V-8.

Does anyone sell an alternator kit for this engine? He has the cooling fan mounted on the generator pulley. The car is still 6 volt.

We tried at Power Master but no go. Any help would be appreciated.

38 coupe · 10-13-2023, 08:43 PM

You can do it fairly easily, takes a bit of cash. The least ugly way I have seen it done is using a 39-48 Powergen alternator with an Offenhauser alternator pulley with fan mount. There are other combinations that work including whittling your own bracket to mount the alternator and swapping the voltage reference unit to convert the alternator to 6V.

But why? If you are staying 6V the generator will almost certainly do everything you need at less cost and look better doing it. Why is your friend wanting an alternator?

cas3 · 10-13-2023, 09:10 PM

I have an EJ Whitney conversion on my 34. They take the stock gennie and stuff an alternator inside. Looks correct, fan mount stays the same. They are not cheap, and take a month or so to get. 6 or 12 volt, pos or neg ground. Not a lot of amps, but better than stock.

petehoovie · 10-13-2023, 09:22 PM

Quote:

Originally Posted by cas3

I have an EJ Whitney conversion on my 34. They take the stock gennie and stuff an alternator inside. Looks correct, fan mount stays the same. They are not cheap, and take a month or so to get. 6 or 12 volt, pos or neg ground. Not a lot of amps, but better than stock.

See > https://ejwhitneyco.com/automotive.html

The E. J. Whitney Company has been converting vintage automotive generators to alternators since 2004 with great success.

deuce lover · 10-14-2023, 01:19 AM

Speedway sells a bracket and separately a fan mounted pulley for the conversion.Here are pics of it on a '33 .

https://www.speedwaymotors.com/Flath...ount,8946.html

https://www.speedwaymotors.com/Plain...cket,4130.html

petehoovie · 10-14-2023, 11:09 AM

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Quote:

Originally Posted by deuce lover

Speedway sells a bracket and separately a fan mounted pulley for the conversion.Here are pics of it on a '33 .

https://www.speedwaymotors.com/Flath...ount,8946.html

https://www.speedwaymotors.com/Plain...cket,4130.html

Andy · 10-15-2023, 10:43 AM

I converted my gen to 12V using a 56 case. Worked great. I was afraid of an alternator because they like to spin fast and the fans do not.

deuce lover · 10-15-2023, 01:14 PM

Why would it spin any faster on a flathead with the same size pulley?

Andy · 10-15-2023, 01:33 PM

It wouldn't spin any faster but it would work better spinning faster. The pulley I bought was a smaller diameter.

Bored&Stroked · 10-15-2023, 05:40 PM

I have a converted 1934 Generator from EJ Whitney on my 32 cabriolet - has been on there for 7 years - works flawlessly.

deuce lover · 10-16-2023, 12:05 AM

I had 4 done by Whitney when I lived in CA back in the early 2000's and yes they worked great.Price and 40 amp output are some of the limitations.The OP was interested in Alt conversions

10-13-2023, 08:23 PM	#1
Y-Blockhead Senior Member Join Date: Jul 2011 Location: Redondo Beach, CA Posts: 5,849	1937 V-8 Alternator Hi all, I'm asking for a friend. He has a '30 Ford Woodie with a '37 V-8. Does anyone sell an alternator kit for this engine? He has the cooling fan mounted on the generator pulley. The car is still 6 volt. We tried at Power Master but no go. Any help would be appreciated.

10-13-2023, 08:43 PM	#2
38 coupe Senior Member Join Date: May 2010 Location: South Texas Posts: 1,631	Re: 1937 V-8 Alternator You can do it fairly easily, takes a bit of cash. The least ugly way I have seen it done is using a 39-48 Powergen alternator with an Offenhauser alternator pulley with fan mount. There are other combinations that work including whittling your own bracket to mount the alternator and swapping the voltage reference unit to convert the alternator to 6V. But why? If you are staying 6V the generator will almost certainly do everything you need at less cost and look better doing it. Why is your friend wanting an alternator?

10-13-2023, 09:10 PM	#3
cas3 Senior Member Join Date: Jan 2011 Location: sw minnesota Posts: 4,578	Re: 1937 V-8 Alternator I have an EJ Whitney conversion on my 34. They take the stock gennie and stuff an alternator inside. Looks correct, fan mount stays the same. They are not cheap, and take a month or so to get. 6 or 12 volt, pos or neg ground. Not a lot of amps, but better than stock.

10-15-2023, 10:43 AM	#7
Andy Senior Member Join Date: May 2010 Location: Kerrville, Tx Posts: 2,771	Re: 1937 V-8 Alternator I converted my gen to 12V using a 56 case. Worked great. I was afraid of an alternator because they like to spin fast and the fans do not.

10-15-2023, 01:14 PM	#8
deuce lover Senior Member Join Date: May 2010 Location: Southern France Posts: 5,307	Re: 1937 V-8 Alternator Why would it spin any faster on a flathead with the same size pulley?

10-15-2023, 01:33 PM	#9
Andy Senior Member Join Date: May 2010 Location: Kerrville, Tx Posts: 2,771	Re: 1937 V-8 Alternator It wouldn't spin any faster but it would work better spinning faster. The pulley I bought was a smaller diameter.

10-15-2023, 05:40 PM	#10
Bored&Stroked Senior Member Join Date: Jan 2011 Location: Central Ohio Posts: 5,070	Re: 1937 V-8 Alternator I have a converted 1934 Generator from EJ Whitney on my 32 cabriolet - has been on there for 7 years - works flawlessly.

10-16-2023, 12:05 AM	#11
deuce lover Senior Member Join Date: May 2010 Location: Southern France Posts: 5,307	Re: 1937 V-8 Alternator I had 4 done by Whitney when I lived in CA back in the early 2000's and yes they worked great.Price and 40 amp output are some of the limitations.The OP was interested in Alt conversions