Total timing?

[PKRWUD]

Okay, let me clarify something, for the purposes of explaining this, I have referred to WOT when I should have been saying 2500 rpms, or whatever engine speed the full mechanical advance is tuned to comes in at. To be specific, yes, at WOT, the ported vacuum source is zeroed out, but prior to WOT, at common driving speeds, both the vacuum advance and the mechanical advance can and do simultaneously reach their peak, so if you don't account for this, you will have detonation problems. That was the whole point I was trying to make here.

I disagree about the article, though. They are mistaken.