Originally Posted by Stu @ M Developments

A topic close to my heart. The amount of absolute garbage Dyno figures out there Is absolutely shocking mate.

The biggest compensator is the intake air temperature, followed by atmospheric pressure, ambient temp and humidity.

Even the tyre pressures, temperatures and strap loading affects the readings significantly and a good Dyno operator will read, monitor and record all these parameters on a car that is going to have regularly tuning done to ensure consistency.