If anyone gets dyno'd on a Dynojet please post up. I may do that soon.
No offense to mustang dyno users, but there are just too many human controlled variables to make those readings good to hand out to others. They're always low and depending on the operator readings can be different each pull. IMHO a mustang dyno is only good if you use it for your baseline, dont change ANY parameters on the dyno each session, and keep coming back to it as you mod the car. Nothing more.
Any dynojet within the US will read within 1 hp of each other and are usually fairly correct ( you dont have to use compensations or formula's) which is why I use them.
As far as load tuning, if you have standard software you can easily tune at set rpm's you dont have to sit there to do it.
As far as Air Fuel readings....are they just using a tail pipe sniffer? If so, then those are subject to scrutiny too because of the repeated use they see and how they inherently work. If you want correct AF readings you'll need to use a seperate machine plugged into the O2 sensor bung.