Contour Enthusiasts Group Archives Forums General Dyno and Drag My SVT's dyno results.

They can determine the "average difference" in percent over multiple dyno runs from both mustang and dynojet and come up with a generic number like 5% difference. Then you just multiply or divide by the percentage.
It isn't meant to be exact but only to standardize for comparison purposes.
If we didn't allow standardization of temperature and pressure then NO dyno graph would be worth the paper it was printed on.
I'd take it for what it is worth.