My car hit 22.8 psi the first day in both performance and eco mode.. At first I could not really feel a difference between the two, because both are HUGE improvements over stock. Now after a few days, it is obvious to see that the ECO mode is much slower to build boost at lower throttle inputs than performance mode. Which I actually like as the passing performance is still very nice. Think of a scenario where you are passing a car with the in cruise control activated, the last thing you want is to have slow acceleration when passing on a two lane road because you forgot to switch into performance mode...
I think a lot of the perceived performance can be attributed to not only the higher boost, refined AFR, and more aggressive timing, but the throttle by wire settings appear to have been adjusted. This helps induce more throttle blade opening at lower pedal inputs, helping it appear to increase the performance of the car. The ability to adjust the driving dynamic with throttle by wire is astounding, especially with a manual transmission where throttle/clutch input sensitivity by the driver is much higher.
