PerTronix 91581LS Ignitor II Adaptive Dwell Control, Prestolite 8

The Ignitor II has many of the same great features that the Ignitor has, but its smarter. Ignitor II units sense the coil current level and use a powerful micro controller to adjust the dwell. Variable dwell helps to maintain peak energy throughout the entire RPM range. Ignitor II systems develop up to 4 times more energy between 3000 and 5000 RPM than standard ignition systems. High RPM performance is improved when used with the Flame-Thrower II super low resistance (0.6 ohms) 45,000 volt coils. FEATURES • Adaptive dwell maintains peak energy throughout the entire RPM range, reducing misfires while improving engine performance. • Develops on average 4 times more available energy between 3000 and 5000 RPM, and 2 times more available plug voltage. • Compensates for inherent electronic delay by adjusting the spark timing throughout the entire RPM range. • Synchronized peak current and spark timing reduces heat build-up. • Senses startup and develops more energy for quicker, easier starting. • Built-in reverse polarity and over current protection shuts down the system, preventing component damage. • Legal in all 50 states and Canada. (C.A.R.B. E.O. #D-57-22) • Guaranteed for 30 months... We Stand Behind It!

• Adaptive dwell maintains peak energy throughout the entire RPM range, reducing misfires while improving engine performance.
• Develops on average 4 times more available energy between 3000 and 5000 RPM, and 2 times more available plug voltage.
• Compensates for inherent electronic delay by adjusting the spark timing throughout the entire RPM range.
• Synchronized peak current and spark timing reduces heat build-up.
• Senses startup and develops more energy for quicker, easier starting.

Installation Instructions (PDF)