Vacuum advance information and myths

Yup,
VA is not understood. Not helped by ignorant magazine writers you talk about the 'feature' engine in their article, & mention the MSD or DUI dist they are using for free plug, but make no mention of VA.
That’s usually because they are writing a magazine article and the only number that matters is the peak number on a dyno. Almost never does the “magazine build” get stuffed in a car and re-tuned for the street