CSL '0401' Program Binary Disassembly Notes

[Tomba]

Oh man that would be very cool. ...

Likely you would need seperate wideband control units to control the widebands as I suspect the stock hardware (MSS54) isn't able to control pump current for the widebands. Then there is an issue with the ADC conversion, I believe the stock lambdasondes input voltages are increased by amplification circuit to optimize the full range of the ADC. 1.2V lambda sonde voltage might be 5V input on the ADC. The wideband control units output voltage will need to work in a relatively small range (0-1 V vs 0-5V) and might reduce accuracy and resolution.

I work with OEM engines and ECUs for testing and some OEMs have implemented a "wideband" function in their narrow band application. Once this function is enabled the input voltage present the actual lambda value. 1V = lambda 1, 0.8V = lambda 0.8. Mainly used to control the mixture during full load. The ETAS LA-4 wideband is able to feed a 0-1V signal for this. I wouldn't expect this function to be present on MSS54, but might be an idea to implement. As you said, it will take much work as the original narrow band signal is used for many sub functions. Might be able to turn the "wideband signal" in two, one converted to actual lambda and one converted to narrowband lambdasonde voltage. Enough to think about.
I do think it is not necessary, as I never heard people getting different lambda ratios during full load. Stock corrections should be able to correct it. I can understand the desire for a load depended enrichment factor during full load, rather than the current ambient pressure based one for charged applications. I would expect that with your current knowledge it shouldn't be much trouble to change the variable x/y axis for a map?!


Tuning and logging with tunerpro,
Depends were you send the live data to, if you use CAN and connected K+DCAN to the OBD port were also vehicle CAN is connected (pin 6 and 14) you will see the cluster going bananas sometimes. I suspect commands send to K line are also transmitted over CAN and interrupt the vehicle CAN. Experienced this on my E46 320i (M54B22/MS43). Would need 2 cables connected to each bus (k-line/ CAN) (one flashing, one logging) or all over k-line (DS2 command).

Live tuning would be my preference. But how to implement? It would mean certain amount of maps or whole areas are put in RAM and read from RAM instead of ROM/FLASH (don't know if that is already done?). Commands from CAN/Kline would tell the uP to change the address location and value and update the map. I'm using OLS300 now and need 2 ECUs to switch as there is one memory for master and one for slave.
I believe there are programs that export data real time/once changed. Make a program to detect changes, if change is present send location and value to ECU, ECU updates and voila! Once done tuning, flash calibration. I doubt it would be that easy