PerTronix 91181 Ignitor II Adaptive Dwell Control for Delco 8 Cylinder

Develops on average 4 times more available energy between 3000 and 5000 RPM, and 2 times more available plug voltage when used with Pertronix Flame-Thrower Coils Adaptive dwell maintains peak energy throughout the entire RPM range, reducing misfires while improving engine performance Synchronized peak current and spark timing reduces heat build-up and compensates for inherent electronic delay by adjusting the spark timing throughout the entire RPM range Senses startup and develops more energy for quicker, easier starting Pair with Pertronix Flame-Thrower Canister Coils 45001, 45011, 45111 for optimal performance