To me, the test isn't going to prove anything. All you are doing is an off idle test, and if the fuel will light off with a .030" gap, going wider isn't going to matter. With a no load engine, the throttle is barely cracked open, so cylinder pressures and heat don't come in to play like real world driving. Even the most basic system will run a "no load" engine.
I found this in an online text book,
"Coils operates according to Faraday's Law of electro-magnetic induction.
As the high tension voltage in the secondary winding builds up, a particular voltage level is reached when the spark plug gap suddenly becomes conductive, allowing the spark to occur. This is known as the “plug firing voltage”.
The level of plug firing voltage depends on many factors, such as:
The mixture density
Turbulence
The pressure in the cylinder
The spark plug gap
The condition of the spark plug electrodes
The resistance of the secondary circuit
When the spark reaches the point where a high intensity current is flowing in the secondary circuit, the voltage drops to a much lower spark voltage level, sufficient to sustain the spark. This gives the mixture the opportunity to ignite during the duration of the spark. "
I had a Ford Flathead engine I played with for a while, it had a four speed transmission on it with a park brake on the tail shaft. I could really load that thing down with the park brake and fourth gear. We had a water hose running over the drum to cool it. The Ford really made noise at full power and pulling on the brake lever!
Joe
Last edited by Joe H; 07/18/2015 1:49 AM.
