[Kenth]

Dave, "Reason: The ZZ has the vacuum advance sourced on ported vacuum, which causes it to come in upon acceleration, not the right way to do it, but that is the way the EPA had GMPP run the distributors, so the engines can get certified to sell. Vacuum advance is NOT supposed to be a second acceleration advance curve, and GMPP had to slow the mechanical advance curve extremely down to dead slow, to allow the vac adv to work on ported, which is the wrong way to do it."


I have found past off-idle there is NO difference how the load compensator works.
It will always reduce the amount of ignition timing at heavy acceleration, ported or full manifold source used.
Please explain how a vacuum operated load compensator would ADD timing at acceleration?