Vacuum Advance and why to use it on the street

[PxTx]

Just to clarify, every type of timing advance system you mean just MA and VA, right? How much MA did you have and how much VA did you have? What about the springs and weights on the MA?

I hear your plea to be open mined. I struggle with the fact that you have 1 single static timing on a street engine and I am expected to understand that it is the best set-up for the street because you are driving it. I feel you are leaving a lot on the table as far as the quality of your tune, but the more you explain what configurations you had less success with- the better I'll be able to understand how you got to your static timing tune.

Engies are very dynamic and typically have different timing needs at idle, part throttle, WOT and off throttle deceleration. For those reasons I beleive in a dynamic ignition system is best for street driving.

Look at how many cells there are for timming maps on stand alone EFI systems which are used regularly for big inch, high HP engines driven on the street. From my perspective, static timing seems to be in the minority of conventional ignition tuning configurations.