I have a question about A/F readings and a cam

Yeah, I can pull my 230/237/110 down to 550 with the clutch, and it will idle around the parking lot by itself like that. 750 in neutral.14* initial timing, even down to 10*initial.( dial back timing device in the cab)

Ba-bupup,babupup, babupup, babupup, babupup............. .
That's the sound of 230@050@550rpm. .. .. .. .. 550/60=9.16 revolutions per second. At 4 shots per revolution, thats 36.6 shots per second.
Say it with me now; ba-bupup,babupupbabupupbabupup.......................
OK, now, a lil faster............

BTW; the location of the O2 in the collector can play a role in it's reading too; If it's too close to the merge....well you know.......I'm sure you know all that.
This is more of a problem with some of the cheaper headers with very short collectors.
One more time; ba-bupup,babupupbabupupbabupup.......