Do Three-Prong Spark Plugs Offer More Power?

[DelManuel]

No, compared to single-prong spark plugs, three-prong spark plugs actually have slightly weaker power performance. The advantage of three-prong spark plugs is that they feature three side electrodes, providing slightly better ignition performance than single-prong spark plugs. The spark gap of a three-prong spark plug is formed by the cross-sections of the three side electrodes and the cylindrical surface of the center electrode. This side-positioned spark gap increases spark accessibility, delivers greater spark energy, and makes it easier for the spark to enter the cylinder, effectively improving the combustion of the air-fuel mixture and reducing exhaust emissions. How Spark Plugs Work: The ground electrode of a spark plug is connected to the metal shell, which is threaded into the engine block via the cylinder head. The insulator primarily serves to isolate the metal shell from the central electrode. The terminal nut is the part of the spark plug that contacts the high-voltage coil. When current passes through the terminal nut and the central electrode, it ionizes the medium between the central electrode and the ground electrode, generating a spark that ignites the air-fuel mixture in the cylinder.