Unfortunately, an ignition system is not a static environment. Total resistance in the circuit changes from moment to moment, depending on the state of development (or collapse) of the magnetic field in the coil, the inductive reactance of the coil windings, and the state of charge or discharge of the condenser. While the ignition system might be technically called a DC circuit, there's a huge AC component involved which varies continually and affects the overall current flow. My brother gets paid a thousand dollars a day to run computer modeling simulations of proposed new electrical parts for automotive applications, and the manufacturers who purchase his consulting services are glad to pay his fees. He's got a master's degree in electrical engineering, and a doctorate in plasma physics. He was one of about half a dozen engineers worldwide who were working on computer control programming for the fusion reactor program a few years ago. That gives him the math background to figure out all those variables with some degree of authority for his findings. BTW, he's also an ASE certified Master Automotive Technician!
Jerry
