Jon, Accel recommends that the supplied 0.85 ohm ballast resistor be used in addition to the vehicle's original ballast resistor (right off the Accel website). Assuming that the original ballast resistor was 1.5 ohm, the current will be 4.6 amps and you will have 3.22 volts at the coil. This current value agrees well with the accecpted limit of ~4 amps through points. In practice, the current will less because the resistance of the ballast resistor increased with temperature. I have no idea where your 8-10 volts comes from. If you had 9 volts across the coil, you would have 12.86 amps through the coil and points. Clearly too much. Another point to ponder. IF the Accel Supercoil's only difference from a standard points coil is the primary inductance, you would actually have worse performance. Can you guess why this is?
