Everything You Wanted to Know About Ignition Advance

you can put together ten engine specialists and you are going to have probably ten different comments. knowing how to truly understand the true operation of an Otto cicle engine is not easy.
the text simply wants to show the functioning of each element of the distributor.
When I started my job, the spark plug was my only indicator of the correct setting (1984). and in 2020 I use: a "Horiba" engine test bench, individual exhaust temperature sensors, lambdas sensor minimum two, see even one for each cylinder, MAP sensor, air temperature, rpm, water temperature at several points engine and cylinder head, and much more ....
And finally I realize that I know nothing and that every day, I have more questions to ask than answers.
the history of humanity is summarized = attempt and error