Tachometer

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Model T Ford Forum: Forum 2013: Tachometer
Top of pagePrevious messageNext messageBottom of page Link to this message  By James L. Purdy on Friday, January 18, 2013 - 12:46 pm:

Does anybody ever have some sort of tachometer hooked up on a car using ford coils?


Top of pagePrevious messageNext messageBottom of page Link to this message  By Ricks - Surf City on Friday, January 18, 2013 - 01:01 pm:

40 RPM per MPH. Do the math in your head - staves off Alzheimer's.


Top of pagePrevious messageNext messageBottom of page Link to this message  By James L. Purdy on Friday, January 18, 2013 - 01:02 pm:

Thanks Rick.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Eric Dysart - SoCal on Friday, January 18, 2013 - 02:47 pm:

That conversion only works in high with stock gearing. Low gear, Ruckstell, Warford, and other ring and pinions give different results.

I believe that someone mentioned a tach based on the magneto in the past. But that starts the whole "modern electronics are blasphemy in a T" conversation again.

Thinking otherwise, my 1999 GMC diesel Suburban uses the alternator to drive the ECM and the tach. If you change the belt pulley, the engine stops working well unless you compensate for a different pulse rate. On a T with a gear drive gen or alternator, something could probably be figured out.

Eric


Top of pagePrevious messageNext messageBottom of page Link to this message  By Erik Johnson on Friday, January 18, 2013 - 03:10 pm:

Tiny Tach has been mentioned in the past. I have no experience using one.

http://tinytach.com/gasoline.php


Top of pagePrevious messageNext messageBottom of page Link to this message  By Ricks - Surf City on Friday, January 18, 2013 - 04:54 pm:

10/40 is 44 RPM/MPH

Stock 11/40 (3.63:1) is 40 RPM/MPH

13/39 is 33 RPM/MPH

Low is 2.75 times each ratio, above, or with 11/40 is 110 RPM/MPH.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Eric Dysart - SoCal on Friday, January 18, 2013 - 05:28 pm:

And shift into Ruckstell, and you need multiply your RPM by 1.51. Forget staving off Alzheimer's, I'm going have to pull over every time I want to figure out what RPM I'm turning. And then, once I'm sitting by the side of the road in neutral, my speed (0 mph) isn't going to tell me how fast my engine is idling.... :-)

Eric


Top of pagePrevious messageNext messageBottom of page Link to this message  By Tony Bowker on Friday, January 18, 2013 - 08:23 pm:

When I was teaching my son-in-law to drive the speedster, he didn't like running in low with no indication (other than noise) when to move into high. The he found Buzz Pounds BuzzTach and he wanted one. So the speedster has a BuzzTach. Buzz made them for coils and distributors and any rear end ratio. You might find one at a swap meet. Buzz stopped making them when the supply of 270 degree meters dried up.


Top of pagePrevious messageNext messageBottom of page Link to this message  By James L. Purdy on Friday, January 18, 2013 - 11:45 pm:

I was told that there were more accessories made for model T fords than all other cars combined,I just thought that there might be a period correct accessory tach made by somebody? Thanks for the input!


Top of pagePrevious messageNext messageBottom of page Link to this message  By Bud Holzschuh - Panama City, FL on Saturday, January 19, 2013 - 10:26 am:

i have not used the tiny tach on the T, but I have used them on several motorcycles. Cheap and work well.

schuh


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