How to wire up HEI modules All five explained with diagrams GM distributor 3 4 5 7 pin Ignition coil

[@jacquespoirier9071]

very good overview.

[@Mark-Willis]

Commenting for the algorithm. Keep up the good work

[@raysoto1969]

@@Mark-Willis Thank you

[@stevensapyak7971]

11.15.24. ☝🏼Outstanding tutorial🎯

[@briang4470]

I have seen points used to fire other types of CDI ignition boxes and from what i have seen, it does make the points wear down slower but they seem to get corroded much faster especially if used in a high humidity climate or only used occasionally, because the cdi box only puts a tiny current/load through the points there is no powerful spark/arc to blast away the corrosion from the contacts like in a normal points application. So you trade off less wear for more frequent cleaning on the points.

[@raysoto1969]

@@briang4470 I didn't realize that, maybe because I live in a very dry climate

[@briang4470]

@raysoto1969 I'm in a very humid area and points around here tend to fuzz over and corrode after only a few months to a year of sitting. For that reason if I'm going to use points I try to just use them as originally intended. In my opinion I don't see any reason to use them to trigger a cdi/hei module because now you have the both the problems of a cdi box that can randomly fail and drop dead and you have the maintenance and connection issues with points. So I try to go fully electronic if I'm going with a cdi/hei style ignition it just seems more reliable to me.

[@nkelly.9]

Fantastic coverage of this subject Ray. Thank you for sharing your considerable knowledge on the subject. I have not seen such a comprehensive coverage of this subject. I have one question for you. Can you tell me the primary resistance of the coils that these modules ordinarily fire?

[@raysoto1969]

I assume these modules can fire any coil with the primary resistance of .2 to 3.0 ohms. I have used quite a few different styles of coils over the years, without any issue

[@nkelly.9]

@@raysoto1969 Thanks Ray. Very interesting, they must be very forgiving. Many ignition systems have conniptions if they are not mated to a coil with the correct rated resistance specified for them. Your experience a very good guide. Many thanks Sir.

[@michaeldolson2397]

did you draw that? lol thats pretty good!!

[@v8packard]

Ray, Thanks for these videos. I really enjoy them and the clever ideas. Are you familiar with the the late module used on the L30 and L31 engines? I think it is Delco D579. I have thought about it as an alternative to the D1906, since the best quality versions are no longer made.

[@raysoto1969]

Yes, it can easily be wired in place of the 4 pin module... Definitely more reliable than the currently produced 4 pin modules

[@mikeclement7780]

Can the 7 pin be used in conjunction with Holley's Terminator X ecu and individual coil near plug systems?

[@raysoto1969]

@mikeclement7780 You would need to use multiple modules if you want to use multiple coils. These modules were designed for use with a distributor and a single coil.

[@maxpowerta3183]

Hello....... 8 pin module here, am I invisible or something !?

[@raysoto1969]

@@maxpowerta3183 As awesome as the 8 pin module is... it never came in the HEI distributor from the factory

[@maxpowerta3183]

@@raysoto1969 That is true, but for a video anthology of GM electronic distributor ignition modules I guess I just expected to see the final version 👍

[@raysoto1969]

@@maxpowerta3183 Maybe I can make a video about the eight pin module someday... since no one has made a video about it