The car
The project car is a BMW E30 325i with a 3.0 litre stroker engine with turbo. The stock Motronic system is not good enough for this engine, and it has been decided to install a Genboard.
Many details will be the same as for the installation of MembersPage/GergelyLezsak.
Engine details
Some of these things are still not decided upon:
- Engine: M20B25 , 6 cyl inline, 12 Valves, SOHC.
- Primary trigger: Stock 60-2 VR crank-trigger.
- Ignition system: Single coil, mechanical distributor.
- Idle control : Stock solenoid, two coils - only one used.
- I heard that both coils must be used, "A" powered to decrease opening and "B" used to increase it
- Fuel injectors: Yet to be determined.
- TPS: Yet to be determined.
- IAT: Yet to be determined.
- CLT: Stock coolant sensor has NTC curve 2.5kOhm@20C. (NTC's are normally rated at 25C ... not a big difference though)
Issues
- TPS needs to be converted to potentiometer-style for best result. Resistor network cold be hacked together to get three unique positions or a modern TPS could be mounted.
- There is no stock IAT with the AFM gone. It could be custom made with a NTC thermistor (found in Webshop) or maybe a commercial GM/Delco IAT sensor ($16 at Summit Racing).
- Fuel injection needs to be sorted out, this depends on keeping the stock harness or building new one which wires to separate injector drivers for each injector.
Genboard wishes and details
Ordered an assembled unit and should be configured like:
- Primary trigger : VR sensor / 60-2 wheel
- Secondary trigger: Currently no cam sync, but prepare the board for Hall.
- Low voltage flyback.
- One channel EGT mounted with flying loom, see below.
- knock is also mounted for most v3.3 (and for all v3.3 in EU stock at the moment)
- stepper is usually mounted for assembled units (unless explicitely required otherwise, of course)
econoseal harness or just connector
- if you can/want crimp, order EC18-wire and EC36-wire.
- If you want receptacles with crimped wires, you want EC36-harness and EC18-harness.
EGT conn
- make SURE that I'll need the K-compensational cable soldered to the board
- together with the small filtering cap (we use 0805) of almost any value (10..220nF probably best) soldered at the connection near the AD597AR chip (bottom of the board, at the place where the K-compensational cable meets the board).
- K-compensational cable attached as a flying loom out through the end plate(rubber grommet)
- and a K-connector. Note that there are at least 3 kinds of K-thermocouple connectors. If you already have a sensor with a
- rectangular, big (uncommon; looks similar to one show in webshop, just bigger)
- rectangular, miniature (common)
- round (Jason has some, not yet shown in webshop)
Preferred date of shipping: late July. Note that order is apparently not checked out yet, it's among the "problematic orders". Please see if you can do something about it (check out). If you fail, for some reason, we can service it from there too.