[sperry]

si Drive is pretty useless. All it does is remap the drive by wire throttle, so on lower settings, it's literally the same as just not pressing the throttle as far down. That's it. In fact, on my OBXT, putting it in "intelligent" mode results in the worst gas mileage.

Now, if aftermarket reflashes are able to use the si drive knob to actually switch full boost/timing/fuel maps, that would be awesome, but I'm pretty sure all you can do is remap the throttle pedal curve. As such, I'd be happier with another cup holder or the bigger seat heater buttons than si drive. At the least, they could have made it a 3way switch on the steering wheel instead of taking up the center console with a big knob.