CUCV Tachometer

[jgb680]

Has anyone installed a tachometer on a CUCV? Can it be done?

 

[True Knight]

I installed a Dakota Digital tach interface so you can use any standard gas tach. Only issue I had with it is bad connections on my part, and the instructions don't say how close the sensor needs to be to the flywheel teeth. After looking up what the spec should be on google, I turned the sensor in until it touched the flywheel teeth, then backed it out half a turn and locked it down. Now it works great.
Universal Flywheel Tachometer Interface

 

[Warthog]

There was a recent thread about the Tiny Tach. Looked good. Search for it and you will find many threads about tachs in CUCVs

 

[1986Blazerk5]

Auto meter makes a low rev diesel tach, but its $130 and it looks nice when installed right and is very accurete. It also dosent take up much room the diameter is less them 3 inches.

 

[jdemaris]

Has anyone installed a tachometer on a CUCV? Can it be done?

There are many ways to do it.

Use an aftermarket universal tach sender box to enable any gas engine tach to work.

By a tach that works off the alternator stator. Some alterators already have built-in taps for hooking tachs to. If not, you just pull it apart and tap in.

By a tach that uses a photo-sensor that you attach to a rotating part of the engine.

By a 6.2 diesel vacuum pump with the electronic RPM sensor on top. That runs a tach nicely.

I've had an AutoMeter diesel tach on my 87 diesel 6.2 for 20 years. It's worked flawlessly. It uses the stator tap.

 

[scrambled]

before someone tells you to check the wiki or use search, http://www.steelsoldiers.com/cucv/62765-tiny-tach.html

Tiny Tach Rules!

Travis

 

[kapnklug]

I just installed an Autometer diesel tach on my M1009. I found one on Ebay brand new for $80. It was easy to install, I put it on the steering column using a long hose clamp, and the probe goes on either alternator using another long hoseclamp. Works great.

 

[Warthog]

before someone tells you to check the wiki or use search, http://www.steelsoldiers.com/cucv/62765-tiny-tach.html

Tiny Tach Rules!

Travis

Too late, I already did in post #3....LOL

 

[bigflew]

heres mine in place of the steice plug it is an auto meter unit came with sensor and wiring (sensor goes on alternator)

 

[jakwi]

http://www.steelsoldiers.com/cucv/28797-tach-cucv.html

If you're the handy type you can take a look at this thread. I repurposed an 8k gas engine tach, It worked pretty good, and only cost me a few dollars as I had the tach already.

 

[jgb680]

Thanks everyone! I'll see what i can come up with

 

[lilymonster]

Another really nice (although more expensive) option is to get a 2 1/16 diesel tach from ISSPRO Gauges. It installs very cleanly in the space to the left of your voltmeter on the upper right of the cluster. Some contact truck M1028's I have seen have had this exact ISSPRO tach/set up and that is what gave me the idea. Plus it feels a little more "stock" to have what the military themselves installed on CUCV. ISSPRO also makes extremely high quality gauges and the part numbers you need are R8503 for the tach and R8900 for their specific purpose built sensor kit for the GM 6.2. Alligator diesel has these parts or you can get them directly from ISSPRO

 

[southdave]

I went the delete the vac pump route and installed a pick up off a humvee with the tack

 

[skysix]

Has anyone swapped in an OEM GM tach from the same vintage trucks?

 

[DTL]

I went the delete the vac pump route and installed a pick up off a humvee with the tack

If you delete the vacuum pump, what sends the vacuum signal to the trans and the fuel pump? Sorry for the hijack.

 

[GM72K10]

Has anyone swapped in an OEM GM tach from the same vintage trucks?

I'm curious about that too, anyone?

 

[pigfoot63]

If yor running a 700R4 or 4L80 Transmission you don't need the vacuum pump

 

[bevanet]

My Banks turbo system came with one. It came with a sensor that mounts next to the balancer/pulley and works great!

 

[skysix]

So what is the max rpm on a J diesel? And the beginning of the danger zone? (wondering where to end the scale and where the "red" zone should be...

 

[bevanet]

They should have a govenor so that you really can't over rev them unless perhaps going down a steep hill with the engine holding you back. In arizona one of the emission tests is to floor them in neutral and check the emssions. I think mine would rev to a little over 3000.