What is the maximum speed to be expected, if one in the mentioned US vehicle with 5.3 liters displacement and 273 hp ( top speed at 160 K/mh regulated), the control so to speak deactivated, however this works, by chip tuning, or by other interventions? Would this also increase the acceleration capacity further? Should at higher final speeds conversions be made on the vehicle? How much more consumption would one have to expect then?