after bullydog gt tunes for 3.8 jk 2008
Get HP Tuners and get to play with more parameters one at a time. Then you note it down and change it back if it does not improve. EG if you put more non-pressurized air in then you can change the pulse width of the injector to match the extra air = more power. Plus there is the timing curve that is open for playing with. The HPTuner costs $299USD and you need 2 credits at $50 each for access. That would be my choice but in reality it is hard to get 15-20 more HP from a JK 3.8. I used to dent the floor with the throttle and grit my teeth. That was good for 10HP. Put the money in the piggy bank for a new JL one day.








