I'm just about ready to purchase a TTS MasterTuner but have a question that I'm sure someone can answer. Bike is a 2010 FLHX. The OEM stock map sets the closed loop AFR to 14.6 - 1. I know that this value can be changed via the lamda value but my question is this: "Does the VTune option work in closed loop mode to suggest a new closed loop AFR value"?
There are many help files with Mastertune, one is maybe an answer to your question:
What does VE Tuning Accomplish?
The VTune process is used to calibrate the ECM’s VE tables such that the desired AFR is obtained under all riding conditions. After the VE tables are calibrated for your engine build, t
he AFR can be adjusted to the desired mix of performance and economy, and the ECM will maintain these values. By tuning the values in the VE table to be as close to ideal as possible, the amount of adjustment that the ECM must perform is minimized. This results in reduction of settling time and a smoother, more responsive engine.
I hope this helps a little.