Anyone know how to convert a E12-80 to GMHEI

[ajen68510]

I am looking into this as it was suggested my GM ECU is not reading the E12-80 ignition module properly , hence i am having issues at 4400 to 4700 RPM. I suspect its a Fuel issue after i changed to a Colt 449 cam. Any help is appreciated. I did do a search, nothing came up.

[datzenmike]

I am looking into this as it was suggested my GM ECU is not reading the E12-80 ignition module properly , hence i am having issues at 4400 to 4700 RPM. I suspect its a Fuel issue after i changed to a Colt 449 cam. Any help is appreciated. I did do a search, nothing came up.

Hmm.... you would think that if it doesn't 'read' it at 4,200 why would it at above 4,700. Well the HEIs are cheap to try.


I know it says 'Non Matchbox' type dizzy but it will still work.

[ajen68510]

I am looking into this as it was suggested my GM ECU is not reading the E12-80 ignition module properly , hence i am having issues at 4400 to 4700 RPM. I suspect its a Fuel issue after i changed to a Colt 449 cam. Any help is appreciated. I did do a search, nothing came up.

Hmm.... you would think that if it doesn't 'read' it at 4,200 why would it at above 4,700. Well the HEIs are cheap to try.


I know it says 'Non Matchbox' type dizzy but it will still work.

Hi Mike, I should have been clearer, it pretty much bogs out at 4400-4700 depending what gear i am in. And thanks, Thats a great diagram !

[510rob]

what are the the ignition angle and intake vacuum like in that operating range?