What is the difference between the RPG unit and MSD ignition?
The difference between the RPG 4700 plasma spark and MSD ignition lies in basic combustion physics. The air fuel mix inside the combustion chamber is ignited when an ionized plasma channel traces a path across the spark plug gap. The spark is the ‘hottest’ as it breaks across the air gap to the other electrode and the fuel is ignited ONLY during this initial break down phase which lasts less than 100 microseconds. As soon as the spark reaches the ground electrode the subsequent tail end of the spark is of little to no use in the combustion process and is wasted energy. Once the fuel ignites the efficiency or net energy content of the burn is determined by how fast the flame front expands and how much of the fuel is fully combusted. Full combustion results in a greater amount of heat energy liberated which is then converted to mechanical work by the piston. The rate at which flame front expands is determined by the amount of energy delivered in the first few microseconds as the gap brea
