Hey everybody. It's been a long time but I'm finally starting up the project again. Between work, getting married, and a pile of other things none of you care about, it's been way too long.
Right now my bike is packed into the back of the garage so deeply you can barely see it:
Though between my birthday and a very nice present from my parents as a bachelor present, my toolbox has never been nicer:
Since it's nearly impossible to get in there to do anything, especially since my dad bought 2 snowmobiles, I've turned to getting the Engine Management Computer built and tested as I can do this at home.
As you can see there are a lot of holes and not a lot of components. This is the beauty of this design. This board can do so many things it makes ECU's like a MOTEC look basic and over priced. Just by using different components, I can customize the board to suit any situation.
This is the board as it came from the UK. I was worried that the group of Open Source guys that develop the software and circuit boards for this project will have upgraded since I bought the kit over a year ago. I was on their website just last week and I went to the 'requests' section of the wiki to see what might be added or have been added. The message was clear. Nothing is planned because the board can already do everything.
The good news is that to do what I need, not all of those little holes need to be filled with components. When the board support 16+ cylinders and 20+ injectors, EGT sensors, and a pile of other features I'm not touching, the board will need surprisingly few components. Just some driver FETs for the 2 coils and for the 4 injectors, the MAP sensor (which is mounted right on the circuit board and supports up to 30 psi), and some miscelaneous components.
When done, the board will be set up as follows:
- Drive 4 injectors. Semi-waste. Squirt 2 cylinders at once. Each Cylinder will get a squirt at TDC.
- Drive 2 coils. Wastespark. Same as with squirt, TDC will get spark wether on power stroke or not.
- System will re-use the OEM Throttle position sensor.
- System will re-use engine temperature sensor.
- System will re-use crank trigger and will not use the cam position sensor
- System will re-use IAT sensor.
- RPM triggered digital output will be configured to control air shifter to act like an MPS Autoshifter
- Unlike the OEM electronics, fast idle will be automatic.
- ECU will control cooling fan. I'll custom tweak the fan to run as often as needed.
- ECU will control a nitrous solenoid or similar device as a fully mappable PWM boost controller
- Idle speed will be controlled dynamically by advancing and retarding ignition
- Input from Wide Band O2 sensor will allow ECU to re-configure it's own maps on the fly.
- Input from WFO throttle switch to prevent full boost unless throttle is Wide Fucking Open.
- Increased redline. I haven't decided how high to go but likely 12k or something like that.
I haven't decided if/how I'm going to use the ECUs capability to incorporate up to 2 EGT sensors and other inputs/outputs. Possibilities include monitoring fuel pressure to include fuel pressure drop failsafes, generic input switches to put ECU into a crippled rain mode like the new sport bikes have, adding a knock sensor (The ECU supports up to 2. Though tuning a knock sensor not designed for this engine is something I'm not sure I want to get into), and so much more!