Have been giving a bit more thought on the possibilities regarding EXUP control. Agree that the EXUP does a great job of ensuring smooth power delivery at low / mid range. Once on tour I had the opposite problem with my EXUP - I stupidly put the pulley back on backwards after servicing the valve meaning my EXUP could not fully open and it was very noticeable as the bike struggled to get above 90mph. Corrected it at our next stop and what a difference it made. Although I would like a nice loud exhaust note (especially when filtering through london traffic - and most likely well below 5000 RPM). So I'm thinking an additional set of options on the TFT Dash named 'EXUP Control' hitting this menu would give you the following options:
- EXUP Controlled by ECU (i.e. don't do anything with the EXUP - just let the ECU control it normally)
- Fully open at Idle (for that louder exhaust idle, but once you're above a set speed, revert back to EXUP Controlled by ECU)
- Always open (keep the valve open, louder exhaust note, sacrifice some low / mid range power, and send fake signals to the ECU so you don't get error codes showing up on the tacho)
- Manual control (explained below)
- Test EXUP (this would simply open and close the EXUP several times without having to run the engine, good if you've just serviced the valve and want to make sure everything still works)
The manual control option would be interesting as it would allow you (whilst riding) to decide whether to open the valve, you might be doing slow speeds filtering through traffic therefore a bit of extra exhaust sound might be good. Once you're out of traffic and then want the ECU to have control of the EXUP - just hit the button on the TFT Dash remote and the EXUP would revert to ECU Control. This would then give you the flexibility of having some extra exhaust note (whilst sacrificing power), but then when road conditions change and you want your smooth power delivery back, hit the button and then you have that extra power back and your EXUP reverts back to control by ECU.
Additionally if you have your EXUP controlled by ECU - I would include a third diagnostic panel on the main screen which would show a nice graphic of the position of the EXUP. You could then visibly see it's position change as you ride.
On the practical side not much would have to change for the TFT Dash on the hardware side, it would need an extra communication wire which links to an 'EXUP control unit'. The 'EXUP control unit' is something additional I would provide, but I imagine this to be a small box which would sit near the EXUP servo and would plug into the EXUP servo. The plug coming from the ECU would then plug into the box. It would sit between the ECU and EXUP valve giving that extra flexibility.
Would need to do a bit of research and prototyping to see if the above will work practically, but theoretically it should work.