Nothing proves engine theories or new parts like a little dyno time. Street Muscle Action decided to take a closer look at ignitions in general and the ever popular HEI ignition in particular. We also tested a stock unit against a high-performance unit from Performance Distributors. The HEI is a popular choice because it requires only one wire to hook up and houses the control module and coil internally for a very sanitary installation. But the dyno proved that all HEI ignitions are not created equally.

Printable Dyno Sheet

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