A common way to fuck with the numbers is to put the weather station near a heat source and AFAIK this can be done with a dynojet. I have seen in some of the Big Al youtube videos they have the weather station covered with a blanket next to a computer. Dyno it in 50 degree weather and apply correction for 80 degree temps and there ya go. The only dyno that cannot be fucked with is the MAHA dynos (same one the car makers use).