Originally Posted by robertf03
That is not the efficiency that anyone is talking about.
potential power in vs power out. Unless your wasted spark is creating an afterburner effect it is wasted input in ( .1 millijoules or whatever the spark power requirements are)
Spot on Robert - efficiency of an internal combustion engine is a measure of how much of the fuel is turned into USEFUL work.
Anyway, back on topic what order are we recommending the O/P do?
14CUX to start with then try megasquirt or similar system?