1935 Columbia firewall picture

[Dave/Green Bay]

Does anyone have a picture of the placement of the control valve that mounts on the top of firewall on a 1935 ford? I have the instruction but pictures are very bad. Thanks Dave/Green Bay

[V8COOPMAN]

Dave.......Here are a couple of pics of PeterC's beautiful '35 3-window which does have a Columbia. More pics of his car in his album. Click the link just below for his album. Hope this helps. DD

https://www.fordbarn.com/forum/album.php?albumid=576

[Dave/Green Bay]

DD: Thank you very much for the pictures. I was on the web and found John Connelly from Columbia Two Speed Parts Inc and he is emailing a template. I got the controls from John 7 or 8 years ago, brain fade! http://www.columbiatwospeedparts.com Again thank you. Dave

[Bursonaw]

Here is the setup on my 36 Ford I just finished the install earlier this year.







I used a 46 tru 48 speedometer changing unit so the speedometer reads correctly as you shift the overdrive.




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[RobR'35]

I too have the installation instructions for '33-'34 and '35-'36. Nowhere in the instructions is there any measurements or a diagram to show where to drill the hole through the firewall.
I've often wondered why.

[Bursonaw]

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Here what I used. I used a step drill to make the hole. It worked beautifully.




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[Swarm]

What size copper did you use?

[Bursonaw]

3/8" copper tubing.


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[Dave/Green Bay]

Bursonaw: Outstanding. The pictures show the complete installation and will make my project much easier. Thank you very much Dave

[Dave/Green Bay]

Bursonaw: I took a little more time to look at your pictures tonight. Looking at the under dash picture do the vacuum holes to the clutch release lever hook to your speedometer? I see the speedometer changer with hoses hook to it. What am I seeing? Thank you Dave

[Bursonaw]

The vacuum hoses hook to the main vacuum lines to the rear end. I've included an additional picture that should help.




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[RobR'35]

Very cool and descriptive thread.
It's a neat idea using the later vacuum controls to switch your speedometer.
The 90° I see hooked to the back speedometer gear changer I'm not familiar with. Was that made by Stewart too?
Did u have to use it in your application?

[Bursonaw]

The 90 I had setting in my tool box for the past 30+ years. I think it came off an aircraft tachometer or something of that sort. I have seen the on the internet. The roadster dash is approximately 1" closer to the firewall than the other models so I had mod the shifter lever in addition to using the 90. If you decide to do the same with the speedo changer, only tighten the mounting clamp so it just barely tightens. If you over tighten the clamp it will bind and break your speedo cable. I learned the hard way on that one.


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[Kurt in NJ]

I looked for the pictures--at Hershey I took some pictures of an "original" installation and that had a piece of felt betweem the sloped part of the firewall and the valve---sort of an air filter for the valve, I don't know if it is original but it seems like a good idea

[Bursonaw]

Originally Posted by Bursonaw

The 90 I had setting in my tool box for the past 30+ years. I think it came off an aircraft tachometer or something of that sort. I have seen them on the internet. The roadster dash is approximately 1" closer to the firewall than the other models so I had mod the shifter lever in addition to using the 90. If you decide to do the same with the speedo changer, only tighten the mounting clamp so it just barely tightens. If you over tighten the clamp it will bind and break your speedo cable. I learned the hard way on that one.


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[Bursonaw]

Originally Posted by Bursonaw

The vacuum hoses hook to the main vacuum lines to the rear end. I've included an additional picture that should help.




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[Dave/Green Bay]

Bursona: RobR'35 posted about a vacuum speedometer changes that might answer my earlier question. On my 35 then is a long arm that goes from the Columbia switch lever on dash to the speedometer changer. Did they change to a vacuum unit in later models?

Does anyone know if it would be legal to take the original installation instruction from Columbia insert Bursona picture and other diagrams and make a modern version of the old Columbia instructions?
Thanks Dave

[Bursonaw]

In 1946 they did change to a vacuum operated speedometer changer. I have run that setup in my 1941 ford. When I put the Columbia in my 36 Roadster I did not like that when the speedometer would shift it was not always in sink with the rear end, so that's when I swapped mechanical arm for the vacuum changer.

Not sure about your other question though. John at Columbia Two Speed Parts was very helpful sharing information with in my installation.


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[Kurt in NJ]

I found some old pictures under dash , not perfect .but showing original speedo linkage