I'll second what Wolfe said, but I will add that additional resistance to the secondary side of the ignition (the spark side) will not only reduce EMI, but will also make for a hotter spark. This assumes that the ignition coils can overcome the added resistance, and that the wires are good enough to not leak at the higher voltage.
The upside to a hotter spark is the ability to fire a fouled plug, and the ability to ignite a less than optimum mixture. Cold starts are improved and engine operation with incorrect jetting is more reliable. The down side to a hotter spark is increased plug wear, and any weakness in the ignition system will be revealed. Usually shockingly so...
The upside to a hotter spark is the ability to fire a fouled plug, and the ability to ignite a less than optimum mixture. Cold starts are improved and engine operation with incorrect jetting is more reliable. The down side to a hotter spark is increased plug wear, and any weakness in the ignition system will be revealed. Usually shockingly so...