Resistors for ignition module's benefit, not coil. Coil would be happy as a clam at 12V (that's how MSD, Pertronix, etc run them). Will slowly cook factory ECU however. Simply install new coil where old one used to be. At 18,000 volts don't think plug gap should be increased. Doesn't really qualify as HEI in my opinion. Nevertheless should notice improved performance, especially in cold weather. Bill Robertson #5939 >--- In dmcnews@xxxxxxxxxxxxxxx, "Adam 16683" <acprice1@xxxx> wrote: > I want to do the coil ugrade from Special T's website, but I have a > few questions about it. > > With the 1.8 ohm resistor, is the main power relay removed/bypassed? > > With the original dual resistor setup, the relay removes one resistor > during startup. Is this not necessary with the larger Voltage from > the new coil? > > Thanks! > Adam Price