A comment on vacuum advance:
Vacuum advance is designed to improve fuel mileage of a street driven car during light throttle cruise conditions. The simple fact that the timing is fully advanced only during high vacuum running conditions, and retarded to initial + mechanical timing setting during low vacuum condition due to heavy acceleration does not impede optimal acceleration. As the vacuum increases and decreases while driving relative to acceleration rate or terrain conditions the timing added to initial + mechanical varies from zero to whatever the device is designed to add.
Most vacuum advance pods can be adjusted to come on in a range of vacuum levels enabling one to tune out any light throttle ping. There a selection of vacuum advance pods available to dial in anywhere between 6 degrees to 15 degrees, along with different activation levels based on vacuum strength, so someone can fine tune their curve to make an engine more efficient.
So to say I aint hooken up the vacuum advance on a street car makes no sense, because one is losing enhanced fuel efficiency.
