HEI Modules - Video

[Wageslave]

Here's a video that has a bunch of knowledge about GM HEI modules.

 

[69hurstolds]

All my experience is with that 7 pin module. Great explanations, though. Definitely worth watching.

 

[bracketchev1221]

In the performance engines I done, I've only ever had 4 pin units. I've worked on later cars and replaced them as tune ups, but they were factory stock engines.

 

[olds307 and 403]

I never knew there were two 5 pin or that 3 pin. I had a 5 pin from a 82 Olds but I never used the 5th pin, pretty sure it was tge first one that retarded timing. I have used multiple aftermarket 4 pin modules, killed a MSD and two Pertronix Ignitor 3 modules. I used an Accel 7 pin module without any issues.