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 ...

At some point in the mid 1970s or so, GM (with Delco Remy) came up with a new electronic ignition system known as HEI or High Energy Ignition. We've touted this as an upgrade for many engines in ...

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 ...

Around 1975, General Motors made a significant advancement in stock passenger ignition technology: the High Energy Ignition (HEI). One of its major features was installation simplicity. The coil was ...