How to Phase a Distributor Rotor

Step By Step: Phase A Jesel Distributor
Firing the spark plug at the right time during the four-stroke engine compression stroke is a balancing act. It needs to fire early enough to make sure the air/fuel mixture burns completely but not so soon that the piston gets hammered by the explosion in the chamber above while it's still moving upward. Ideally, the plug fires and the mixture burns as peak cylinder pressure occurs and the piston is dwelling at the top of the stroke, ready to be pushed back down. Superchargers, turbochargers, and nitrous-equipped engines build cylinder pressure quickly in relation to the rotation of the crankshaft and piston travel, which means less ignition advance is required for a properly timed burn. Big boost and large nitrous shots require high-octane fuel and total ignition timing in the 10