Are all the 8 pin ignition modules that same?

[rang-a-stang]

I’m going to head to the wrecking yard here in a few days and need a new 8 pin ignition module. Are all the V8 and V6 8 pin modules the same? I prefer an OEM part over an aftermarket so I plan to look for a dirty original over a shiny aftermarket part. Want to know if I can check vans, S10s, Silverado, etc....

[In-Tech]

What are you considering to be an 8 pin module? The one with the 4 pin and 2 pin weather resistant connector that has 2 more pins that go to the reluctor? If so, they are all the same. Make sure to put heat sink compound and not dielectric grease under the module. You can use dielectric grease on all the electrical connections. I'm with you on the aftermarket being poor on all HEI modules. When I buy new I only buy Delphi these days, not even AC-Delco.

[rang-a-stang]

Exactly! (4 and 2 pin weather packs)
Yep, I have an obnoxiously big/ugly heat sync on it and heat sync compound.

thank you for the quick response, Carl!

[In-Tech]

NP, glad to help.

[tayto]

Another test: while checking the timing as the RPM was increased, both the 048 & 369 modules held steady until a particular RPM. This was with 048 & table 1, then 369 with table 2.

The 048 module, it held steady timing until about 3800 RPM where it retarded 4 degrees. Then by 5000 RPM the retard had increased to 6 degrees.

The 369 module, it held steady timing until about 3200 where it gained 2 degrees of advance. This held steady to 5000 RPM, which is the highest RPM it was checked at.

https://www.thirdgen.org/forums/diy-...n-modules.html

[In-Tech]

That's good info. I never saw a difference on any of the GM modules/distributors but the msd distributors definitely required a latency change in the MEFI computers back when I was checking all of this. Now it sounds like the MSD had an 048 module in it, I always blamed it on the ford style reluctor in the msd distributors . FAST355 is here and can probably shed more light on this. I'm glad you brought this to our attention. I guess I didn't have enough distributors laying around when I was testing stuff.

Next time I am at the junkyard I am going to grab a few modules and test in my distributor machine.