My latest project with my 510 has been to get the instrument cluster from an R33 Skyline (RB25DET motor) into my car, and hooking it up to my SR20DET motor. I don't think anybody else has done this, and from the responses I've received when I've mentioned it, I don't think it's a popular modification. It's just not "period correct," as I've heard it said... which is odd, because the engine isn't exactly period-correct either.




Anyhow, I picked this instrument cluster because it has all the gauges that I like in one place without having to include a bunch of separate gauges. I especially like the boost gauge... although that particular gauge has been giving me a bit of trouble.

I looked all over the place online and found a few places where somebody has explained the wiring of the cluster, and at least one place that gave a rough explanation about how the boost sensor itself is wired, but I didn't find anything that spelled it out for me in a way that made sense.




So... between following all the traces on the back of the cluster, putting together the complete wiring diagram, I was able to actually put something together that should help me figure this thing out.




The image above is the FULL diagram with the boost gauge lines colored in so I could see what was going on. It's a 5mb+ image, so click at your own risk.




The odd thing is that after going over the diagram and the cluster for hours, I finally figured out that the diagram is wrong. The diagram and chart above spells it out a bit; the plug on the far-right is written in exactly backwards (instead of 1-to-12, it's 12-to-1). So, I put my own chart together and hopefully that makes it easier for me (and anyone else doing this) to figure the wiring out.