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If working properly, an electronic coil current switch is FAR superior then switching by the use of mechanical points which bounce and ring plus begin to deteriorate as soon as they are used. In addition, any oxide or carbon or burning which inherently builds up on their surfaces becomes resistive which can weaken the spark. The solid state electronic switch works faster and is more positive, therefore, even if using the stock coil, there might be be more energy expended across the plug gap which is whats needed to better initiate combustion. HOWEVER to get the most bang for the buck and utilize the full advantages the switch can offer, I HIGHLY RECOMMEND you couple it with a high energy high performance high voltage coil which often results in also running a wider plug gap. Although you could still use EITHER a 6 volt coil PLUS an added external series Ballast Resistor, I would recommend use of a full 12 volt (some call internally ballsted) rated coil, and again, a high performance coil as recommended by the switch manufacturer. On a 12 volt system, a 6 volt coil still requires the Ballast, while a full true 12 volt coil does not REGARDLESS if points or an elec switch were used to switch coil current. Just make sure if you use a 6 volt and a ballast, to wire any required 12 volt power to the switch AHEAD OF the ballast to obtain 12 volts instead of the 6 thats available AFTER the Ballast (i.e. on the coils input) NOTE check with the vendor as far as coil recommendations, cuz I believe some of the higher power coils may require a higher current rated switch then others. ALSO if youre running a wider plug gap (say like 0.035 to 0.045 or even more) you need to have good high quality plug wires and distributor cap n boots etc since at higher firing voltages theres a greater chance of high voltage breakdown and arcing. ALSO check with them for plug wire specifications, cuz although one normally uses pure wire core plug wires, some switch vendors may specify resistive plug wires. I guess the bottom line is to buy the whole package (switch, coil, plug wires) a vendor such as Pertronox may offer if your inexperienced in these matters. Best Wishes, God Bless, let us all know what you decide. John T Nordhoff in Indiana, retired Electrical Engineer
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