1. How does a crank trigger work? The systems are relatively simple in design and similar to how OEM ignition systems are triggered.

Later, when GM upgraded the Gen IV engines by converting its original 24x crank-trigger wheel to a 58x, it required a new box, which MSD calls the 6LS-2 controller.

MSD's new Digital Coil-Per-Cylinder (CPC) ignition system offers state-of-the-art control over all ignition-related operations. The components required include two control boxes (system and ...