Why does Dynatek recommend 5 ohm coils for street use and 3 ohm coils for racing?
The resistance of the coil determines how much current flows through the ignition system. The 3 ohm coils, because of their lower resistance, pass more current and therefore run warmer than the 5 ohm coils. If the coils are located where they receive good airflow and are away from engine or exhaust heat, then 3 ohm coils will generally give reliable service on the street. However, when the coils are located under the tank, between the cylinders, or close to the engine with a tight fitting cover, 3 ohm coils may overheat. This is most likely to occur under worst case conditions, such as creeping along in traffic on a hot day in Arizona (this isnt so great for an air cooled engine either!). Rather than get into the specifics of every application we make the general recommendation – 5 ohm for street, 3 ohm for race. NOTE: DO NOT use the DC6-5 coil with the DS6-2. Damage to the coil and ignition will result and will NOT be warranted.
