The GM High Energy Ignition (HEI) self-contained distributor and coil package is a slick upgrade for any small- or big-block Chevrolet engine over a breaker point ignition. But the HEI does suffer ...

If there is a standard in the world for a stand-alone electronic ignition distributor for GM engines, it has to be the High Energy Ignition or HEI distributor. This large cap distributor first ...

Racers are famous for being able to break just about anything. And not surprisingly, we're no different from them. A perfect case in point is our dyno test mule engine. We recently used it to test ...

The GM HEI (High Energy Ignition) electronic distributors have a reputation for hassle-free performance. Used in GM rigs from its inception in 1974, the famed HEI can be retrofitted to almost any GM ...

The intermittent stalling problem was solved by replacing the distributor. This is the sequel to troubleshooting my ‘86 Dodge Aries that defied logic and baffled my mechanic. To be sure, electronic ...

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 ...