That is a new one for me... an HEI causing pinging. Here is what could be happening:
- HEI's create a hotter version of what is called the 'spark kernal' (the initial phase of combustion, from which all the rest of the combustion spreads)
- A hotter spark kernal will cause the initial phases of the combustion process in the chamber to move along faster.... In that aspect, it is somewhat like more timing advance in the system.
- The /6 combustion chamber is not the best for too much timing advance.
- So you may have to retard the initial timing a few degrees now. Where is it set now?
