The Ford Barn

donQ · 04-10-2015, 09:24 AM

The change from the oval speedometer to the round one occurred in 1930. Is there an estimated date or serial number when this change was cut in?
donQ

160B · 04-10-2015, 09:51 AM

The round speedometer was introduced in June 1930. (RG&JS page 6-3 revised 2011)

It will also be acceptable to use the pre-existing part for as two (2) months after that date on vehicles and six (6) months on AA commercial vehicles. (RG&JS page7 revised 2011)

Brianfrench65 · 04-10-2015, 11:03 AM

As I understand, the fuel tank will only take the round, if it originally had a round speedometer, and if the car had an oval originally, then you can only use an oval speedometer.

Please educate me, if I am wrong. I am trying to learn.

My car is a May car, and currently has a round speedometer, however I thought it should have an oval speedometer, which I was told, will bolt up to my fuel tank.

MAG · 04-10-2015, 11:16 AM

""I understand, the fuel tank will only take the round, if it originally had a round speedometer, and if the car had an oval originally, then you can only use an oval speedometer. "" Correct.

If you want to change to Oval Speedo you must replace the gas tank with one that will accomodate the Oval Speedo Dash Panel. The Oval Dash Panel and the Round Dash Panel will not interchange.

mot · 04-10-2015, 11:18 AM

i have a may 30 tudor A3330379 it has the oval speedometer
so it had to happen between yours and mine
i have no idea what your motor number is
any one tells you a oval speedometer instrument panel can be hooked up to you gas tank is wrong
the gas tanks are totally different
Steve Plucker did a great article on this
tom

donQ · 04-10-2015, 05:48 PM

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Thanks for the information. I find the comments useful.
donQ

Brianfrench65 · 04-10-2015, 05:56 PM

Thank you for the education. It takes the wisdom of others, to keep this hobby going, accurately. Some things cannot be found in books.

grumpyoldsman · 04-10-2015, 06:32 PM

my 31 cp had a oval speedo in it over 80 years of people doing what they do

Dave Mellor NJ · 04-10-2015, 11:06 PM

Most commonly, 30 standard roadsters are restored into DeLuxe. If it has an oval speedo you must change the tank and get a round as DeLuxe didn't come out till after the switchover.

04-10-2015, 09:24 AM	#1
donQ Senior Member Join Date: Apr 2011 Posts: 146	speedometer change The change from the oval speedometer to the round one occurred in 1930. Is there an estimated date or serial number when this change was cut in? donQ

04-10-2015, 09:51 AM	#2
160B Senior Member Join Date: Aug 2010 Location: Port Orchard, WA Posts: 1,498	Re: speedometer change The round speedometer was introduced in June 1930. (RG&JS page 6-3 revised 2011) It will also be acceptable to use the pre-existing part for as two (2) months after that date on vehicles and six (6) months on AA commercial vehicles. (RG&JS page7 revised 2011) __________________ 1931 160B & 1931 68B If you don't have time to do it right the 1st time, how do you have time to do it the 2nd time? Last edited by 160B; 04-10-2015 at 10:21 AM.

04-10-2015, 11:03 AM	#3
Brianfrench65 Senior Member Join Date: Mar 2015 Location: Freetown, Massachusetts Posts: 511	Re: speedometer change As I understand, the fuel tank will only take the round, if it originally had a round speedometer, and if the car had an oval originally, then you can only use an oval speedometer. Please educate me, if I am wrong. I am trying to learn. My car is a May car, and currently has a round speedometer, however I thought it should have an oval speedometer, which I was told, will bolt up to my fuel tank.

04-10-2015, 11:16 AM	#4
MAG Senior Member Join Date: May 2010 Location: Austin, Texas Posts: 925	Re: speedometer change ""I understand, the fuel tank will only take the round, if it originally had a round speedometer, and if the car had an oval originally, then you can only use an oval speedometer. "" Correct. If you want to change to Oval Speedo you must replace the gas tank with one that will accomodate the Oval Speedo Dash Panel. The Oval Dash Panel and the Round Dash Panel will not interchange. __________________ I noticed the harder I work the luckier I get!

04-10-2015, 11:18 AM	#5
mot Registered User Join Date: May 2010 Location: Sacramento Ca Posts: 1,179	Re: speedometer change i have a may 30 tudor A3330379 it has the oval speedometer so it had to happen between yours and mine i have no idea what your motor number is any one tells you a oval speedometer instrument panel can be hooked up to you gas tank is wrong the gas tanks are totally different Steve Plucker did a great article on this tom

04-10-2015, 05:48 PM	#6
donQ Senior Member Join Date: Apr 2011 Posts: 146	Re: speedometer change Sponsored Links (Register now to hide all advertisements) Thanks for the information. I find the comments useful. donQ

04-10-2015, 05:56 PM	#7
Brianfrench65 Senior Member Join Date: Mar 2015 Location: Freetown, Massachusetts Posts: 511	Re: speedometer change Thank you for the education. It takes the wisdom of others, to keep this hobby going, accurately. Some things cannot be found in books.

04-10-2015, 06:32 PM	#8
grumpyoldsman Senior Member Join Date: May 2010 Location: Erie Pa. Posts: 104	Re: speedometer change my 31 cp had a oval speedo in it over 80 years of people doing what they do

04-10-2015, 11:06 PM	#9
Dave Mellor NJ Senior Member Join Date: May 2010 Posts: 780	Re: speedometer change Most commonly, 30 standard roadsters are restored into DeLuxe. If it has an oval speedo you must change the tank and get a round as DeLuxe didn't come out till after the switchover.