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'''Engine setup''' * V12 60 degree even-fire * Mounted in a boat (pro-longed high load compared to a car) * Two spark plugs per cylinder, total 24 spark plugs ** Bosch Motorspor 3x2 coilpacks (4 pcs required for one engine) ** Beru 3-channel ignition modules (min 10 mA drive current) * One fuel injector per cylinder ** Siemens High-Z 9 Ohm fuel injectors * 24-1 crank mounted trigger wheel Due to lack of outputs I will handle the engine electrically as an inline 6 cyl. '''Two injectors per injector output.''' * Can one FET handle sustained high duty cycle with sufficient cooling? * Two injectors 9 Ohm results in 4.5 Ohm @ 14 Volts = 3 Amps '''Driving the ignition modules''' * Six outputs required - using four stepper outputs and two logic level outputs * Drive current requirement per ignition module input is minimum 10 mA ** Driving two channels is a minumum 10x2 = 20 mA up to 40 mA. ** Can the IGBT logic driver handle this? ** Suitable resistor values on board? * Stepper outputs are powerful, but current limiting resistors are recommended to protect from short circuits
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