The temperature sensors I need for my project are readily available through NAPA and elsewhere. It’s cheaper to get them there than on EBay or elsewhere. The GM Part number is 15326386. They are $11.99 each if I want to wait for them to be shipped in or $12.99 to pick them up today. I will need two. One will be a coolant temp sensor and the other an ambient air temp sensor. I can get the connectors for these sensors with GM part number 12162193 and 12103881 (first is connector, second is terminal). On EBay the connectors are about $2.50 each and the terminals are $5 for a pack of 25.
Ignition pulse generators are just what I need
Poking around in the service manual for my PC800, I found a section talking about the ignition system. The ignition pulse generators (page 16-2, item #4) and associated wheel are just what I need to measure in order to time injection events. I hope that I can read them with a MegaSquirt without interfering with the stock ignition system. Perhaps after I get the bike well-tuned, I will dabble in ignition control.
The front pulse generator runs on the white/blue and blue wires while the rear pulse generator runs on the white/yellow and yellow wires.
Page 16-8 in my manual gives a good schematic view of the pulse generators and their location.
I believe these are also called crank position sensors. They are most likely inductive in nature, giving a voltage spike with every passing tooth. The PC seems to have seven teeth with one area in between teeth having less metal than the other areas. This most likely will lead to a lower voltage in that area. That will show me where top dead center (most likely) is for the engine.
It looks like the NT700 uses the same technology, although much more advanced, to generate timing data.
Test engine in the living room
This evening Bart’s engine moved from his garage to my living room. This is where it was in his garage. We used an engine hoist on his end to lift it into the back of his van.
This is it in my living room. You can also see the carbs that Phil is letting me borrow while I figure out how to make this whole fuel injection thing work. A bit of brown mud came out of the water pipe when we were maneuvering it around in my living room. Hopefully that’ll come out of the carpet easily 🙂