Got my Z dyno'd today at AWDTuning in Flower Mound, TX. They use a Mustang Dyno.
Good gains though. Temp. here was 90 degrees and very humid so the numbers seemed low at first glance but Keith, the tuner, put up a file of a stock Z's baseline he tuned last year and compared it to my bolt on modded +tuned Z and it's a drastic increase.
See pics below! (excuse the dirtiness)
Results
Video