Standard Ignition Coil Vs. E-Core Ignition Coil

Std. Ignition Coil With Open Core

Ignition Coil With E-Core

Early Ignition Coil designs were based on an open-core construction, which was packaged in a can, that was filled with Oil or Epoxy. NEWER Ignition Coil designs are based on a closed-core (transformer) construction in the shape of an "E", becoming known as the E-Core. These E-Core Ignition Coils have a CLOSED Magnetic Path, which MINIMIZES Inductance LOSSES and which MAXIMIZES Electrical Energy Output!