52mm is 2 1/16. One and the same.
Of course there are many of these kinds of gauges on the market. But I find that they 1) lack high quality transducers when electric, 2) require fluid to the gauge (for mechanical), or 3) are very limiting even when high quality. I like being able to change units on the fly and have min and max values displayed as well.
For example, let's say you want a premium electric gauge. Most are really dumb 90 degree sweet gauges like this:
And for that, you will pay $130 or more. A display like this has awful resolution-- can you tell a difference of 0.2 bar on a display like that?
So maybe you upgrade to a full sweep electric gauge. Now you get a bit better resolution, but can you resolve an integer value? 1 psi? Not that's you'd want do, since the pressure sensor that came with this $250 autometer is not exactly top shelf as instruments go.
The only product really out there that somewhat comparable to what I'm making is the RaceTech Dual Digital gauge (formerly SPA Technique).
The Racetech is compact, precise (some of the best senders/transducers around), and has selectable color and brightness like my display does. Some even let you change units.
But how responsive is the Racetech? Can it catch a transient lasting under 0.01 second and show that is a new minimum or maximum value? No, it can't.
If you want anything like that ability to catch brief transients like my unit will do, you end up needing a datalogging setup. And of course, it's pretty easy to find advanced racing dashes and such for the aftermarket. But how are you going to integrate that into a street vehicle with airbags and such? And is it worth the $1000+ entry just to get started down that path? And how accurate are the transducers once you DO get that far?
The combination of attributes that my setup delivers just doesn't exist in any commercial off the shelf solution that is readily or easily integrated. Digital dashes and such like Banks IDash Pro and such are just showing OBD info. If it's not on OBD, you can't see it.
Honda has no oil info on OBD. How are you going to add your own oil pressure and temp data and broadcast it on the OBD can bus? I don't know how to do that.
So far my project is delivering exactly what I wanted-- high precision instrumentation (good resoluation), high speed oil pressure monitoring for transients, integer value resolution (and legit resolution because the sensors are better than integer value capable), min/max memory, and doing it all in a foot print that is tiny in the vehicle and requires zero permanent modification and no damage to the parent vehicle. It can be fully removed with no evidence left behind it was ever there.
If you can find some that delivers all that for a Honda, then you are a better and more resourceful researcher than I am, because from what I could tell, it simply doesn't exist. So I had to make one.
