The car is a BMW 528 from 1982, chassis model is E28.
Below are details on the install of a VEMS Genboard on the engine.
Engine information
- Stock M30B28, a 2.8 litre inline 6 cyl with 184 hp with stock Bosch L-Jetronic ECU
- Fuel injectors are 6 x 440 cc, low impedance (overkill? yes)
- Ignition system uses a single coil and distributor
- Stock coolant temperature sensor is ok for use with the Genboard
- Stock TPS has to be wired to an adapter to switch resistors on/off to imitate potentiometer type TPS (I want idle/WOT indication)
- Custom intake air temperature (IAT) sensor mounted just after the throttle plate, sensor is NTC from web shop
Plans for Genboard control
The stock engine harness will be removed and replaced entirely to simplify the installation. There will be additional things controlled by the Genboard, not available on the stock engine:
- Electric fan
- Idle air solenoid
- Sequential fuel injection
Trigger setup
On the stock engine - the ignition is not controlled by the ECU (L-Jetronic), it's done by a mechanism in the distributor. I will use a Honeywell GT1 Hall sensor to pick up holes drilled in the vibration damper on the front of the crank shaft. Three holes spaced 120 degrees, the Hall sensor will see these holes at about 60 degrees before TDC of each cylinder.
Genboard configuration
To come.