Gm 4 pin hei module wiring

GM 4-Pin HEI Electronic Ignition Control Module Wiring Connections/Diagram with a Magnetic Pickup Coil. This electronic ignition system operates with full 12 volts. The 7 Pin HEI Module. With a GM

HEI 7-pin (and 8-pin modules), the ignition module wires you need to know about are: tach signal is a purple wire with a white trace [pin R] goes to Ampseal OPTOIN+ pin #30 (ground the Ampseal OPTOIN- pin #31 at the distributor) ; advance control signal is a white wire [pin E] goes to Ampseal pin #12; override (cranking) signal is a tan wire with a black trace General Motors HEI Ignition Control with MegaSquirt-II. There were a number of different kinds of General Motors HEI modules: 4 pin module - electronic ignition, but doesn't do computer timing control, top left; 7 pin module (large) - electronic module that does timing control, used with coil-in-cap distributors, top right; 7 pin module (small) - electronic module that does timing control Oct 29,

2018 · 1. Yes it replaces both. 2. If you use the same coil you still need the ballast resistor to reduce the voltage so it doesn't overheat. Better off to do the HEI module and a C, D or E core coil, as they are made to use a full 12v. HEI Conversions. Finding an HEI Distributor. There are a couple of choices here, new or used. In addition, here are a few things to note: '75 to '79 ('75 to '85 Canadian) used 4-pin modules. The spark duration can already range from 0 to 25.5 milliseconds. The GM HEI module provides a

'distributor-like' signal to MegaSquirt, so the missing tooth settings should not be used. 36. All Items with QT, KT, GT or PT Suffix are Clam Shell Program Items. Pigtails - Two Lead #5439C (#5439PT) Universal 2-Wire Relay Heater-A/C-Wipers CHEVYTHUNDER.COM. HEI and ELECTRONIC SPARK CONTROL FUNDAMENTALS AND TROUBLESHOOTING The ignition system is an integral part of any engine's performance, just a much as the fuel delivery is, whether it is carbureted or fuel injection. Best gallery images for wiring diagram, wiring harness, electrical diagram, engine diagram, parts diagram The HEI distributor is an inductive-discharge-style ignition, but with the points replaced by a solid-state switching

device called an electronic ignition-control module.

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