Ignition systems have one of the toughest jobs under the hood of vintage Mustangs. They handle the very precise job of firing spark plugs in concert with the engine's crank and cam timing events. It's ...

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 ...

There appears to be a surge of misinformation on the internet claiming that anyone who doesn’t hook their vacuum advance line to manifold vacuum is an incompetent tuner. Unfortunately, this can lead ...