Quote: One VERY SIMPLE way is too have the engine room on A/C... if its sucking in cool air it can be 50hp or more
Nope, cells had same ~ambient air temp and humidity, DA within 100ft.
One place even had a "mea culpa" regarding their numbers and in that they were short a good percentage of what it was really off.
If you don't believe there are happy dynos/dyno operators out there, then OK. Some guys out there know how to tweak the software, alter correction factors.
