Base timing. Really ?

A Body 440 WHY NOT said

General terms.
let’s say 20 degree initial
I am not sure about how much the vac Adv is right now
Mechanical should be restricted so the initial + mechanical + vac = total around say 34 degrees ?

Another question is the vacuum ( which I won’t have much of ) comes and goes due to load and throttle position. Needs to be fully in this equation ?
Thanks :poke:

Click to expand...

No. vacuum is not considered when setting timing. It just ends up "where and what it is" unless you have an adjustable can. Total is initial plus mechanical. PERIOD. It's not uncommon and perfectly normal to have as much as 60 "or so" degrees incluging vacuum advance. The vacuum advance is only there to clean up combustion at part throttle and offer "a little" part throttle acceleration help. Since vacuum drops out on acceleration, it's not included when measuring timing.