Up for sale is my Japanese market NB 6-speed gauge cluster. I've extensively modified it to work properly in a USDM Miata, and I guarantee this is the only one like it in the world
It has 6 o'clock needle rest positions, a higher redline, "6-Speed" text, a much cleaner speedometer layout, and red needles.
The 6-speed clusters aren't hugely uncommon in Japan, but theres a bunch of problems with using them on a US-market car
-No dimmer for gauge illumination
-No CEL (JDM cars arent OBD compliant)
-No cruise control light (No cruise control on RHD cars)
These are somewhat challenging to fix, but I cannibalized a USDM NB cluster and made some other modifications to get them all to work.
What was impossible was:
-Speedometer does not report speed correctly when used with a USDM odometer unit
Essentially, if you want to keep your car's odometer, the speedometer won't work properly. If you try to use it, will read incorrectly due to the mismatched scales on the gauge. This annoyed me so much that I taught myself enough electronics to design a custom circuit board to change the scale on the gauge.
I present to you, the Sweep-O-Tron:
This board mounts to the back of the gauge without modifying the stock cluster at all and allows you to arbitrarily change the scale of the speedometer or tachometer reading. You pull power off of one of the other gauges and use the speedo or tach signal from the cluster using a T tap.
It took three revisions and dozens of hours of design, testing, and debugging to get it right, but it works great.
I set the cluster up so that instead of reading kph, it reads actual mph. It's now a 180mph speedometer. It reads slightly high (2-3mph) up to about 60mph, but the scale is dead-on. I tested with a GPS, and it's actually more accurate than the stock speedometer.
The CEL has been relocated to the formerly blank spot (or IMMO light on an NB2) on the top right, which now reads "HOLD" as in "HOLD up your **** is broke"
The dimmer also works now, and the gauge looks great in the dark
I've also linearized the temp gauge using the mazda-speed
method, so it's got a much faster response time and accurate readout:
It works on both an NB1 or NB2 without permanent modification to the vehicle or the wiring harness. It's totally plug and play after swapping in your odometer.
It includes all of the bulbs, the T tap for the harness, and no odometer (use your own!). If the buyer wants, I can also reprogram the board so that it reads kph rather than mph.
I have no idea what this is worth, but I've seen unmodified JDM clusters sell for $100+ on their own. So how about $200 OBO
and we'll see if there's any interest.
I spent a simply unbelievable amount of effort on this thing, and I hope someone else will enjoy it as much as I have.