Gm hei 4 pin ignition module wiring diagram
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 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. click on any of the thumbnails to see a larger picture Since 1975,
General Motors has addressed the needs for efficient combustion with its High-Energy Ignition (HEI) system. 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. 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. Carolina Skif Boat Wiring Diagram 2000 F350 Fuel Pump Relay Location 1988 Buick Lesabre
Wiring Diagram 1986 Honda Rebel 250 Wiring Harness 2001 Toyota Corolla MSD Ignitions install easily to a variety of applications. This diagram shows the wiring with a points distributor. Hey there, building a mild 351w, 73 engine, with performer intake, performer plus cam, 10:1 compression, some porting on heads, headers, etc. The debating is between your Go Street and Go EFI 4 systems and the ignition control capability of the latter. Experience in a Book Lucas Ignition (to 1989) IGNITION SYSTEM DESIGN: An ignition coil requires a certain amount of time to build up enough energy to produce a spark. The faster an engine is turning, the less time there is between sparks, so the output of an ignition coil starts to drop off.