Ask them to pull a couple of degrees of timing and try it out again. My truck's factory rating is 310 horspower and after the tune it makes 302 rear wheel horsepower through the traps in the quarter mile.
Yeah I figured its either too lean or too much timing.....i forgot to compare actual timing numbers.....
Or Ill just weld on a bung and use my wideband thats sitting in my spare room, log and send it to them.