Learn how to wire and install the MSD 8970 ignition control unit with this comprehensive wiring diagram. Follow step-by-step instructions and diagrams to ensure a proper installation for your vehicle's ignition system. Get all the information you need to make the most of your MSD 8970 ignition control unit.. PAGE 1 3-Stage Retard PN 8970 IMPORTANT: Read the instructions before attempting the installation. Parts Included: 1 - 3-Stage Retard Control 4 - Mounting Grommets 4 - Mounting Screws 6 - Retard Modules, 2°, 3°, 4°, 3-Zero° WARNING: During installation disconnect the battery cables.
![[DIAGRAM] Msd Timing Retard Wiring Diagram](https://images.msdperformance.com/8970.jpg "[DIAGRAM] Msd Timing Retard Wiring Diagram")
![[DIAGRAM] Msd 8970 Wiring Diagram](https://az417944.vo.msecnd.net/diagrams/manufacturer/generac/united-states/portable-generators/2-400-watt/8970-3-s2400-2-400-watt/wiring-diagram-schematic-s2400/diagram.gif "[DIAGRAM] Msd 8970 Wiring Diagram")
That is why we have assembled the MSD Ignition Wiring Diagrams and Tech Notes Book. 3-Stage Retard, PN , and Multi-Step Retard, PN Red.. The Three Stage Retard Control allows you to retard your ignition timing in three different stages. You can activate one retard for a nitrous stage and another at top end in high gear for more mph and still have another module left over for dual stage nitrous systems. When activated together, the retard amounts are cumulative so you get the total of the three. For example, if you pull 2.