Hey Guys,
I got some time in on the project.
I drained the fuel and donated it to my lawn mower. Inserted the FF transducer into the fuel system, got 5 gal of fresh fuel, and calibrated the FF. I left the gascolator (used as a vapor separator) in the system so I could measure FF with fuel injection using a single FF transducer. I also left the original fuel pump in place. I will wait to test the Walbro until I have a variable voltage bench supply so I can see how the capacity of each pump varies with voltage.
I moved most of the switch functions over to the bench and wired the "Central Command" instrument panel. The only control left in the aircraft is the Master Switch which enables the starter to run off of the battery. All other power is provided by the bench supply.
Looking ahead, I will probably implement variable timing first. So, I decided to fashion a pointer to help me watch timing changes. The case has a very convenient place to mount a pointer.
It was at that point that I realized that I wouldn't be able to see the pointer from a safe position so I remade the top of the cooling shroud from Lexan so I could safely observe a timing light.
I plumed and wired all of the fuel injectors. I also plumed manifold pressure to both the EIS MAP transducer and the fuel pressure regulator. I pressurized the fuel system. No runs, no drips, now errors. A lot of FI hose. Seems like a fuel rail might be neater.
I added fuel and fired the engine to make sure I hadn't introduced any severe manifold leaks. All good there. I got to see the 02 (Mixture) gauge work for the first time. Very noisy and a very lean indication at idle. That is probably due to misfires rather than an induction leak. The indication settles down as throttle is added.
All of the pertinent signals have been wired to the bench ready for use.
Really the only thing I need to add to the test bed is a timing light. I'll probably install it in the timing shroud so it's easy to turn on and use.
Just about out of excuses. Going to have to switch back to electronics soon. Oh yes, I have a low oil pressure indication of approximately 20 PSI at power. Swapped sensors with identical results. I might try one of these:
https://www.jbugs.com/product/9198.html?utm_content=shopping&gclid=EAIaIQobChMIp6zS0urD9AIVxStMCh2zuwtAEAQYAiABEgLb3_D_BwEI also need to go through the EIS as make sure the limits are set properly.
Forever Forward,
Wes