Please help me with the correct spark plug choice for my engine. I have an ’80 Malibu two door. It has a 0.030-over ’99 Vortec 5.7 with a Pro Comp air-gap intake, 600-cfm Edelbrock carburetor, ACCEL ...

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 ...

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 ...

In olden times, part of the ritual of changing your engine's spark plugs was making sure that the gap was set correctly for optimum performance. That is, the distance between the spark plug's center ...