Appreciate some input on spark plug reading

Newbomb Turk said
Just for the record the only time you have more carbon than oxygen is when you get soot.

Not true. Any time you have a richer than stoich mixture you have excess carbon.

Newbomb Turk said
Which variable? It’s your bullshit. At least tell us how’d you’d do it.

Go figure it out......Go through all the Shrinker files and piece it together.