Putting in new HEI dizzy - plugs?
#3
I am working off of memory, but I believe the early HEI engines had the plugs gapped at .060", then GM backed the specs off to .045" for later HEI years.
Essentially you want the largest gap that an ignition system will fire consistently. The .045" gap will give you a higher energy spark than the .035" gap. (A larger gap requires more potential to build up before it sparks, creating a more concentrated, more powerful spark when it does finally jump the gap.) So, I would suggest .045" as a starting point.
Essentially you want the largest gap that an ignition system will fire consistently. The .045" gap will give you a higher energy spark than the .035" gap. (A larger gap requires more potential to build up before it sparks, creating a more concentrated, more powerful spark when it does finally jump the gap.) So, I would suggest .045" as a starting point.