Adapting VEMS 3.2 ecu to turbocharged 2.5 liter BMW inline 6 engine which is standard ie. without internal mechanical modifications.
Instrumentation, sensors and operational devices.
- Crankshaft Speed/Angular Position Sensor (CS)
- Standard BMW/Bosch 60-2 trigger wheel with variable reluctance (magnetic type) sensor. Bosch item 0 261 210 001.
- Manifold Absolute Pressure sensor (MAP)
- Genboard mounted (VEMS internal) Motorola (MPX4250AP) (2.5 kg/cm2) absolute pressure sensor.
- Coolant temperature sensor. (CLT)
- Standard Bosch item: 0 280 130 026
- Inlet Air Temperature sensor (IAT)
- FAE 33180
- Throttle Position Sensor (TPS)
- Standard OEM spare part 'SE04-M'. 2.6 - 0.88 kOhm angular potentiometer, without idle and full throttle microswitch.
- Idle Air/Speed Control Valve (IAS)
- Standard BMW/Bosch item 0 280 140 509 (rotary valve type).
- There are other solenoid and stepper types easily available.
- For example:
- Bosch item 0 280 140 530 which has three pin connector (solenoid type).
- Bosch item 3 437 010 524 which has four pin connector (stepper type).
- Which one to choose ? Anyone, succestions or comments ?
- Question - where to get Bosch datasheet or how to otherwise find out the solenoid valve ('on/off' or 'pwm') type ? Easiest way might be doing an measurement in existing car, controlled by original ecu. '530' valve is installed in Peugeot 605.
- Lambda Sensor (LS)
- Wide-Band Lambda Sensor (Bosch LSU4). 5 wire special connector, ordered this with the wiring loom connector from VEMS shop.
- LSU4 Bosch item 0 258 007 057.
- Ignition Coil(s)
- Standard distributor with 'TZI' coil.
- For example Bosch item 0 221 122 411 or 0 221 118 322 (2 ms coil on time, should be enough) or wasted spark coil for the 6 cylinder engine. (Bosch item: 0 221 503 002. 3ms coil on time, should be enough).
- Could the distributor (with solid axle, ie. no mechanical advance) type ignition cope the spark advance window needed, is yet unknown (must read another member pages and try out). ** Afterall wasted spark coils are quite expensive.
- Todo: Update when spark delivery type selected.
- Boost control
- Standard wastegate actuator control 'N75' valve, VW/Audi origin.
- Turbo Control
- Turbocharger is 'standard' Carrett T03 center core 'hybrid' item, without variable nozzle turbine. Hence not needeing control device.
- Injectors
- Bigger injectors than in standard naturally aspirated BMW engine are needed to cope with increased power level (from 170 PS to around 250-300 PS).
- For maximum fuel vaporisation modern 2 to 6 hole injectors are preferable.
- Bosch: B 280 431 824/20 item. Has four spray holes with wire splitter, four 'atomization helper' air channels, high impedance (~ 16 ohm). 261 g/min approx. 351 cc/min (N-Heptane).
Wiring loom
- ECU, standard Genboard v3.2 Econoseal (36 and 18) pin connectors.
- CS, IAT, CLT, TPS sensors and actuators, 2 and 3 pin AMP junior timer connectors.
- LS special 5-pin connector, ordered it from VEMS shop.
- Todo: Schematic and connector pin outs for wiring loom.
Firmware, VE, igniton advance and other tables.
MembersPage/BengtR/GenBoardAssembled
- TODO: Other information will be updated within few weeks.