tach....

[tankwilson]

Would like to run a tach in my 49 plymouth with langdon's HEI. How do I? and anyone got a vintage looking tach that would look correct and work???

Thanks

matt

[BobT-47P15]

Matt, is your car now 12 volt, negative ground??

[jd52cranbrook]

Auto meter has one that reads to 4,000. I have one, with 12 volts.

Sorry about the video, lol,,,,, but it does show the tach. And I never bothered to figure out why it does not go to zero when I turn the engine off.

Edited January 4, 2010 by jd52cranbrook

[james curl]

None of the electronic tachs go to zero until the ignition is turned back on. From memory, it takes a hot wire from the switch to the tach, a ground from the tach, and a wire from the tach terminal on the HEI coil to the tach. The tach should have four wires on it, one for the light, one for ground, one for power and one from the HEI coil. I have the same basic distrubtor on my 55 Chevy I/6 and I used the E coil at Langdon's recommendation instead of a standard 45.000 volt coil.

[martybose]

Would like to run a tach in my 49 plymouth with langdon's HEI. How do I? and anyone got a vintage looking tach that would look correct and work???

Thanks

matt

I'm currently running a Chrysler Marine 5K tach off of my HEI, and it works fine. I also have a Sun 5K tach with a separate control box that has been converted to 12V negative ground battery-less operation that I'm not using. I could take a picture of it, or even send it to you to look at if you like.

Marty

[blueskies]

I found a vintage Sun tach on ebay for my flatty. I have it running on a Langdon HEI too. The tach is a self contained unit, it does not have the seperate sender like most of the vintage Sun tachs on ebay... the ones with a seperate sender take mercury batteries that are no longer available.

Pete

[martybose]

I found a vintage Sun tach on ebay for my flatty. I have it running on a Langdon HEI too. The tach is a self contained unit, it does not have the seperate sender like most of the vintage Sun tachs on ebay... the ones with a seperate sender take mercury batteries that are no longer available.

Pete

It is fairly standard to rebuilt the sending unit to eliminate those batteries; mine was done by Williamson several years ago.

Marty

Edited January 5, 2010 by martybose

[blueskies]

It is fairly standard to rebuilt the sending unit to eliminate those batteries; mine was done by Williamson several years ago.

Marty

Marty, how much did it cost to have the tach converted? The places I found wanted in the neighborhood of $200 for the conversion... And I already had $70 into a tach just like yours with the correct 6 cylinder sender.

I sold the tach with the sender for $90 on ebay, and bought the one I have now for $40, no conversion needed. It looks pretty much the same, aside from not having the cool sender box mounted under the hood.

Pete

[martybose]

Marty, how much did it cost to have the tach converted? The places I found wanted in the neighborhood of $200 for the conversion... And I already had $70 into a tach just like yours with the correct 6 cylinder sender.

I sold the tach with the sender for $90 on ebay, and bought the one I have now for $40, no conversion needed. It looks pretty much the same, aside from not having the cool sender box mounted under the hood.

Pete

I'm not really sure, since I sent both the tach and the sender to them and did a full restoration on the tach at the same time. I think it may have been around $140 for the sender conversion.

Marty