1,3,4,2.

[Bob Culver]

Spark advance has been covered at enormous extent previously. Auto advance cars with the misinformation in the handbooks, the difficulty of establishing full adavnce, and myriad combinations of worn and wrong parts can be a puzzle. but the manual cars are delightfully simple as can find optimum in action. The minimum advance to acheive performance or a little less is the ideal crank stress increases hugely with spark advance. For non sport unmodified cars driven as originally 1 1/2 full advance is usually plenty.