I know we have an ECU Mapping thread already, but I want this to apply specifically to flashing the ECU, not piggyback fuel controllers such as Power Commander, Rapid Bike, Bazzaz, etc.
Has anyone had it done on the Supersport? It had some big advantages over piggyback systems (and some may say possible disadvantages).
Here is a copy/paste from Rexxer's website of the disadvantages of a piggyback systems that is defeated by flashing the ECU:
- The auxiliary module is dependent on the signals that the original ECU receives. This causes a timedelay (even if only milliseconds) between the signal receivers and the information received by the auxiliary module (injection nozzles, butterfly valve potentiometer, etc.). Thus 100% optimal mapping is not attainable.
- The installation of additional hardware means that there is more possible sources of error.
- An influencing control on injection timing and Spark Advance in "real time" is not possible.
- When increasing the rev limiter by means of an auxiliary module it is not possible to redefine the fuelling, which can lead to fuelling problems and preignition. These parameters are copied from the rev limit of the original map into the inreased range. Therefore the increased rev range is not mapped to attain optimal performance.
- There is no possibility to deactivate or modify the parameters of the Lambda probe.
- The exhaust-valve control cannot be deactivated.
Being able to disable the O2 sensors and eliminate closed loop means you would have a complete tune through the entire RPM range at any throttle position. It would eliminate the complexity of a piggyback trying to trick the ECU to make adjustments to closed loop. It would surely allow for much better low end/mid range power than the OEM map.
My concern with disabling the stock O2 sensors was regarding elevation and whether the bike would adjust air/fuel without them. Dave at Rexxer said the bike would be fine as the pressure and temp sensors would still be active. I still had my doubts so I contacted my local tuner, who I plan to have do some Dyno work for me in the future, and he said basically the same thing:
"As long as the tune is within normal range you will be fine when the O2 are disabled. The bike will be fine at different altitudes, the air pressure, intake manifold pressure, and air temp sensors will compensate."
Dave @ Rexxer claims to have flashed our ECU's and specifically has a tune for the Supersport with the Competition Werkes pipe. However, I haven't heard of anyone on the forums having a flash on our bikes yet. Would be nice to hear from someone who has it.
If you purchase the Rexxer "User" unit you can do the flashing yourself between different maps and the stock map. Rexxer user unit can also retrieve and reset any ECU error codes and reset the service due indicator.
Disadvantages: If you don't buy the "User" unit, you have to ship your ECU in if you need to flash back to stock or adjust the tune.
Last edited by Audi403; 08-08-2018 at 02:38 AM.