That "upgrade" didn't seem to be mentioned in your Brick's history, Tex.
I'm very confused at this point. I'm guessing now there is some issue with the injectors adding too much fuel. These are the upgraded injectors from an M3 with the 4 holes
@Laitch: yes I did mention them. You were focused on the results of my sensor while I was still focused on the fuel delivery issue. This can be a reminder that there are plenty of incorrect suggestions and advice out there about these bikes.
The 4 hole injectors will not give you more performance but will reduce your fuel consumption.
@Martin: I can report that I had the opposite occur. My fuel consumption INCREASED dramatically and I was only getting 18 mpg with the 4-hole injectors, instead of the 55+ mpg that some riders have reported with the stock injectors. The bike also ran like crud with much higher and very noticeable vibration. Not to mention the black smoke that originally lead me to believe something was wrong.
That edited cutaway you posted is a great visual, thanks for posting it! It looks like the 1-hole injector is able to shoot fuel directly at the back of the valve to help atomize it like Frankenduck mentioned. When I performed my bench tests on the injectors, the 1-hole shot straight out, parallel with the injector itself. But the 4-hole had a spray pattern that was angled outward like a radial crown which leads me to believe, based on that cutaway you provided, that the 4-hole was spraying into the air intake chamber instead of directly onto the hot valve as designed which lead to the poor combustion.
When building the bike, I shouldn't have tried to upgrade anything before getting it up and running. Moral of the story, and say it with me kids: "Don't believe everything you read online.”