Hey guys, just to clear up some general confusion:
1) Without OBDII the JB4 can only read in the sensors it's attached to. In this case the MAP sensor for boost and the MAF sensor for airmass and inlet temperature. Using only those parameters the JB4 can provide pretty solid tuning and map1, map2, and map3 can be run like this. And this allows you to install or remove the JB4 in minutes!
2) Adding the OBDII cable gives the JB4 a lot of additional data including engine speed, pedal input, throttle, timing advance, fuel trims, AFR, engine temperatures, and more. When available the JB4 takes all this CANbus data and incorporates it into the tuning which produces a smoother and better tuning output. Think of it in terms of resolution, high def vs low def. You can still watch the football game in low def but it's not quite as crisp. Without the OBDII certain elements have to be modeled/estimated instead of being read directly.
We understand the OBDII is a total PITA on the platform and we're still looking for alternative connection points. For most of you I suspect the normal "low def" (no OBDII) tuning is so much better than the factory tuning to start with you won't miss the extra OBDII data. And for the hard core among us then you can route it.
