Vacuum advance information and myths

The biggest problem with VA (either ported or manifold) is the lack of willingness of the owner to understand what is happening and why, and the ability (knowledge and tuning time) it takes to get it right. It’s amazing to me how many people you meet at car functions, (race track, car show) who have no idea how to set basic timing or adjust a curve or don’t even know where their timing is. Me; “what’s the timing at?” Them; “don’t know haven’t even put a light on it yet.” Me; shakes head and walks away.