Ignition systems can be one of three basic designs: the distributor ignition system, the distributorless (DIS) ignition system or the coil-on-plug (COP) system. They all perform the same function, but ...
Editor's Note: Way back in March of 1998, GMHTP ran "Opti-Spark" by Ray Bohacz, an engineering-level dissection of GM's Opti-Spark distributor. This evolutionary ignition component was a bridge ...