MSD 8975 Digital Multi-Retard Timing Controller 4-Stage

The MSD 8975 Digital Multi-Retard is a module-free digital timing retard controller designed for high-performance and racing applications. Powered by a high-speed RISC microcontroller, it delivers precise, programmable ignition timing retard across four independent stages—making it an ideal solution for nitrous oxide, forced induction, and other power-adder setups that demand accurate timing management.

Key Features:

• Four independent retard stages — each adjustable from 0° to 9°, and can be activated individually or combined for up to 20° of total retard
• No modules required — all timing functions are fully digitally controlled via rotary dial adjustment
• Timing accuracy within 1° — the RISC microcontroller makes extremely fast compensations without sacrificing precision
• Magnetic Pick-Up Compensation circuit — built-in circuit ensures rock-steady timing signal across a wide variety of magnetic pickups
• EMI-isolated circuits — thoroughly debounced and isolated for reliable protection against Electro Magnetic Interference
• Adjustable start retard — optional cranking retard programmable at 5°, 10°, 15°, or 20° to ease engine starting
• Compatible with 4, 6, and 8-cylinder engines
• Perfect for nitrous applications

Important: The MSD 8975 requires an MSD ignition control (6, 7, 8, or 10-series) to operate. Includes four mounting screws. This is a race-use-only product and is not legal for use on emissions-controlled vehicles.