@RCruiser thanks for your enthusiasm and your kind words, but you have to give credit where credit is due, and in this regards
@Dool shares at least 50% of the credit if not more. I could have never figured out the inner workings of most parameters without him helping with testing and observations.
Anyhow here is the secret recipe of the file: this new iteration includes a pretty precise characterization of the O2 sensor.
As incredible as it may sound we are actually using a narrow band sensor as you would use a wideband sensor.
What this implies? it implies that I can set a target AFR for the time I'm cruising (constant throttle / constant RPM) and the red box will adjust fuel to keep that target, in a proper closed loop mode (wave your hand to the supplier of the red box who said closed loop wasn't possible!). This kind of control was also in the V5 but there were two fundamental flaws:
- the first was that the calibration was upside down, meaning that when the AFR was enriching the red box would think it was getting leaner
- the second was that the calibration was very coarse anyway.
Thanks to
@Dool and his incredible amount of testing with the AFR gauge, I've been able to figure out the proper calibration, or at least a better calibration, for the o2 sensor. We didn't advertise this but we've passed almost two months testing different o2 sensor calibrations and AFR targets, acquiring precious data. I would produce the new map file, Peter would test all four maps and then deliver the data to me to create next iteration, and so on.
Now, being a narrow sensor it will never be as precise as a wideband, so if I set a 14 AFR target, there will be oscillations around that target point. However, we are now at a point where the oscillation are rarely more than 0.5 AFR points and most of the time within +/-0.2 AFR points from the target. The target can be se toward fuel economy or throttle response, the possibilities are many!
In V6 map3 has an AFR target leaned more toward fuel economy, while map2 is leaned more toward power and throttle response. Map1 is somewhere in between.
What you should experience (an it seems like it's working) it's a more stable feeling of power, no hesitations, quick and consistent throttle response and a smoother overall power delivery!
So far I've been exploring (together and thanks to
@Dool's help) most of the Red Box tables and options. There is only one area left for me to explore and that one could lead, I hope, to a smoother idle and faster cold start and other benefits. So far these setting have always worked so I never paid too much attention to them, whether or not they are optimized we shall see! I'll keep you posted!