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Tractor Pulling Discussion Forum

Good Low RPM Tachometer

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39 Farmall M Pu

09-14-2007 08:24:13

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Well, I have seen this discusion many and many times about good tachometers and just wanted to let all you fellow pullers know that I found a good low RPM digital tach. It is made by Glow Shift. They are out of NJ and advertise them on Ebay and their website which is www.glowshiftdirect.com . It is a very good value at $49.99 plus $5 shipping. I installed it on my 39 Farmall M in about 20 minutes and it works great. It is a digital read out and reads in incriments of 1 RPM. Most tachs I was looking at were all by 100 or 10 RPM increments. It also has a built in shift light which I adjusted to be about where my tractor hits the horn on the sled. All in all, I am VERY satisfied with my new tach. I plan on ordering more of them for my other pulling tractors. Just thought I would pass on the word. Oh yeah, sorry JD pullers but it only works on 4,6, and 8 cylinder engines.

Tony

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alliecat

09-21-2007 16:35:28

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Re: Good Low RPM Tachometer in reply to 39 Farmall M Puller, 09-14-2007 08:24:13

i got mine and hooked it up but it doesn't read right
i tried setting it like the instructions said but it only reads 0 when running
i guess i'll call the tech line monday
thanks though it's a cool looking tach

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alliecat

09-21-2007 20:29:31

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Re: Good Low RPM Tachometer in reply to alliecat, 09-21-2007 16:35:28

I have it wired just like you said
if I turn on the switch and press the button once it reads 2400 but when I start the tractor it reads 0 and flashs all sorts of numbers some times it wont program when the engine is running like the instructions say to

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39 Farmall M Puller

09-21-2007 21:14:28

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Re: Good Low RPM Tachometer in reply to alliecat, 09-21-2007 20:29:31

Well, I am no expert on any of this, but sounds like it is not getting a good signal from the coil for some reason. Are you running a resistor with your coil? I don't know if that would make a difference of not??? Keep me posted on what you find out.

Tony

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39 Farmall M Puller

09-21-2007 17:52:38

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Re: Good Low RPM Tachometer in reply to alliecat, 09-21-2007 16:35:28

As long as you have the green wire going to your negative side of your coil (positive if you are set up on positive ground), the black wire going to a good ground, and the red wire going to a 12 volt source, it should all work. Make sure you have it set on 4,6,or 8 on the back of the tach. Hope all turns out well for you.....if not, let me know. I have already ordered more of them for my other tractors.

Tony

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alliecat

09-21-2007 16:35:17

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Re: Good Low RPM Tachometer in reply to 39 Farmall M Puller, 09-14-2007 08:24:13

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Mike n Mo

09-16-2007 06:09:52

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Re: Good Low RPM Tachometer in reply to 39 Farmall M Puller, 09-14-2007 08:24:13

Does it trigger off of points?

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39 Farmall M puller

09-17-2007 07:07:19

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Re: Good Low RPM Tachometer in reply to Mike n Mo, 09-16-2007 06:09:52

Yes, it has three wires to hook up. One goes to a ground point, ones goes to a 12 volt switch, and the other goes to your negative side of the coil.

Tony

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Mike n Mo

09-16-2007 06:09:32

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Re: Good Low RPM Tachometer in reply to 39 Farmall M Puller, 09-14-2007 08:24:13

Does it trigger off of points?

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alliecat

09-15-2007 17:34:49

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Re: Good Low RPM Tachometer in reply to 39 Farmall M Puller, 09-14-2007 08:24:13

thanks i ordered mine last night hope it's as good as it looks
it might be a good invesgtment to try and resell some at pulls and so forth

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alliecat

09-15-2007 17:34:36

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Re: Good Low RPM Tachometer in reply to 39 Farmall M Puller, 09-14-2007 08:24:13

thanks i ordered mine last night hope it's as good as it looks
it might be a good invesgtment to try and resell some at pulls and so forth

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alliecat

09-15-2007 17:34:31

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Re: Good Low RPM Tachometer in reply to 39 Farmall M Puller, 09-14-2007 08:24:13

thanks i ordered mine last night hope it's as good as it looks
it might be a good invesgtment to try and resell some at pulls and so forth

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alliecat

09-14-2007 19:01:27

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Re: Good Low RPM Tachometer in reply to 39 Farmall M Puller, 09-14-2007 08:24:13

thanks for the tip. is the shift light a separate part like it looks?
i really like the way this unit looks.
i think i'll order mine now

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39 Farmall M puller

09-15-2007 02:42:43

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Re: Good Low RPM Tachometer in reply to alliecat, 09-14-2007 19:01:27

The shift light is built in with the tachometer. The tach has its readout and then if you look you can see 6 led lights around the readout, these LED lights are the shift light. I really like the design. The shift light is easy to adjust as well! Hope this helps a little.

Tony

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