The demands for better emissions and fuel economy in the mid 1970s necessitated leaner fuel mixtures. These leaner mixtures required greater voltage and more spark to ignite. This challenge led GM ...

High performance is all about horsepower. But even the ultimate in heads, compression, cam, and the rest won’t make power if you can’t light the fire. Ignition systems don’t make horsepower, but a ...

Sometime around 1975, General Motors made a significant advancement in ignition technology: the High Energy Ignition (HEI to you and me). Its best feature was simplicity. The coil was contained within ...

High energy ignition (HEI) was introduced by General Motors in 1974 and became the standard for GM engines until the mid-1980s. An HEI system has three main components: an ignition module, a magnetic, ...

Most of the used components hobbyists select for their vintage Pontiacs typically require at least a slight amount of refurbishing in order to provide reliable operation-and the ignition distributor ...