The car is a BMW Bavaria 3.0S from 1976, chassis model is E3.
Below are details on the install of a VEMS Genboard on the engine.
- Stock M30B30, a 3.0 litre inline 6 cyl, about 180 hp with stock carburators
- 6 x 380 cc/min fuel injectors, high impedance from E34 M5
- Stock distributor ignition
- Stock coolant temperature sensor is ok for use with the Genboard
- Potentiometer style TPS (got it from Farnell)
- Custom intake air temperature (IAT) sensor mounted just after the throttle plate, sensor is NTC from web shop
Plans for Genboard control
- Electric fan
- Idle air solenoid
- Sequential fuel injection
60-2 wheel from a modern M30 (BMW E34 535 -91) with stock VR sensor.
MSD p/n 8224 "GM 2-Tower Coil Pack"
OK to use with the IGBTs ?
- Low resistance (0.35 Ohms). Not so low inductance: 4.2mH
According to the PDF instructions they can be used for stock replacement on some vehicles, in some cases using ballast resistors, and ultimately the MSD DIS-4 CDI unit is suggested. Pure CDI coils typically have much lower resistance (<0.01 Ohm), this is a half-breed. Will it work as a regular inductive coil? Can the IGBTs handle that?
- 14V / 4.2 mH = 3.3 A/msec so with max 2..3 msec dwell you should be OK.
- Check if the spark energy is suitable for you at 2.2 msec it's ideally I*I*L/2= (3.3 * 2.2)**2 * 0.0042 / 2 = 111 mJ (appr max 100 mJ in realty)