I am at sea level but the humidity is rather high and it's in the mid to upper 90's right now. The first time I brought it to the track, I didn't have time to let it cool for long and it was near 100% humidity in the lower90's-upper80's and it hit a 16.457@82.33 with a 2.361 60foot W/91LB weight-reduction, Intake and UDP. That was with a 3000-3500rpm launch and a tad after 7000rpm shifts.