So, the first order of business after the last work session was to fix that battery bus feed cable. It occurred to me that I didn’t need to completely re-make the cable; there was enough slack that just clipping off one terminal and crimping on a new one was perfectly fine. I did check for the proper orientation of the sensor about 47 times before I crimped on the new terminal, though.
That also led me to think about connectors; my intent has been to put in a three-pin Deutsch connector for the hall sensor, but if I do that I think I want to mount the connector to an engine mount tube, instead of having it hang around in midair. So I ended up ordering some little pads for that purpose, which should be here tomorrow.
From there, it was on to the sort of vague task of how to best organize the wiring runs, and how to actually work things into nice bundles. I decided a good way to make practical progress here was to start picking off the various wire groups, running them to somewhere near their sensor, and let that sort of flesh out the layout. To do that properly, I decided it was time to cut the hole in the right rear baffle where the coil pack and fuel flow sensor wires will go through.
After some thought, I decided the best way to do this was to drill two adjacent 3/4” holes and then open that up to a nice oval shape. That cutout is large enough to allow the coil pack plug to pass through, but will still be covered up by the grommet I bought. Then I laid out the screw holes for the grommet, drilled them, and installed nutplates. I got a picture of the hole itself, but I don’t have the right screws to actually install the grommet…plus that would have been purely for the photo op.
Next, I needed to figure out where to mount the manifold pressure sensor, along with the vacuum block that came with the CPI2 ignition. I ended up mounting those sort of back-to-back, since they’re connected together with a vacuum hose. I didn’t get a good photo of this, but if you look carefully in the following photo, you might see the gold-anodized vacuum block hiding back there.
With those items mounted, I could finally pull wires around. That still didn’t give me a great look at what the routing would look like, so I decided to use some temporary zip-ties to better mock up the harness run, along with where stuff would branch off. The result still doesn’t look super organized, but hey – it’s still a work in progress:
Of course, about the time I was taking this photo, I realized I forgot to include the CHT and EGT sensor wires in the bundles. Those should be fairly straightforward, though.
You might also notice the two stray wires at the bottom of the photo. These are the 5V and ground for the various sensors; they’ll need to serve three and four sensors, respectively, so I’ve got some window-splicing work to do. The general idea will be to pull them along the temporary bundles I have in place, figure out where to put the splices, and then I should be in a pretty good place to maybe start lacing some things up here and doing some terminations.
Electrical stuff is fun. Really.