Heres my tune for a 05 chevy 2500hd 6.0 4l80. The thing runs out great on top, but lacks on the bottom, and wont do a burnout. Is it the converter and brakes keeping it from a burnout?
first is stock, second is final. The thing's afr is spot on with my wideband give or take .2 or so in spots but it runs awesome and pulls hard to the shift points once you get to 3K rpm or so.