[teemmy]

Originally Posted by Lulz_M3

I have mine at 100%, gas mileage still seems good other than wanting to flog the car all the time, the power is just intoxicating. The DME will keep the A/F and timing in check, nothing to worry about.

You may want to invest in a BT cable however, i believe on the 08+ models the DME can store hidden "tuner" codes that will not illuminate a CEL but could be seen if the dealer scans the DME. Maybe someone else can chime in with more info/experience.

^+1

Will JB+ put any unnecessary stress on the DME? When I was researching different tunes people mentioned how JB4 completely relies on DME when adjusting a/f ratios while other tunes such as cobb already had preset a/f tables...

I was thinking about buying a BT cable as well, but most people have told me that the JB+ won't throw any codes, or at least shouldn't. I have no plans to set it past 75%.

[Lulz_M3]

No, the CAN based communications of the DME and sensors is quite advanced and allows real time monitoring of knock and A/F. If knock events are encounted, it will pull timing on the fly to account for it. Same for A/F.

If you are under warranty i would worry about the "tuner codes," if you are out of warranty dont even worry about it.