Once initial timing is set, it's complemented by the mechanical and vacuum advance curves. Mechanical advance adds additional timing to the engine and is based strictly on rpm.

The times they are a-changin’. With apologies to Mr. Dylan, the ignition timing of your 4x4s engine is pretty well set. Ignition timing is what is used to make sure that the distributor fires ...

We take you through the process of how to set initial timing with Performance Distributors clear rotor and clear cap.