I'm in the middle of making a custom dash with Autometer gauges. Tach, oil/water temp, oil press and the stock fuel gauge.

I want to impliment the ODO and trip meter somehow. Has anyone succesfully removed the ODO portion of the cluster and had it still work? Even if I can't display I that's OK. I just want to keep the ODO running in the background even if it's hidden under the dash. That way I can at least keep track of KMS incase I ever sell the car.

Also, if anyone knows of any digital LED style speedos that would be able to be grafted into thes kind of cluster.

 

Hoping to do the same soon, in for responses.

 

I looked at doing this as well, took apart a spare cluster to experiment on etc. The only way I can see to do it is to hook up the speedo somewhere out of the way. It is all driven by the cable and interlocked together. The solution I had planned to do was document/photograph the original mileage and then use a digital speedo with a built in odo that just starts at 0 miles. Just add the two for the actual mileage. But that also requires using a digital sender, I plan to try to convert to an MSM sender (digital 4.10 sender). Another side note I found: if you remove the front glass and trim ring off of autometer 52 mm gauges, they fit perfectly into the smaller holes in the factory bezel.

 

Any digital speedos you found?

 

Autometer makes a few with built in odometer. They basically have a selectable pulse per revolution setting for your sending unit. I wasn't able to find out how many PPR the Miata sending unit is. I even asked a tech friend of mine who called a Mazda engineer and they didn't even know... so it will be a matter of figuring it out and seeing what works. I haven't had the cash to get my hands on one either to just measure it. The other option is to just use the factory MSM or other NB speedo gauge.