Trying to run modern vehicles, with all their safety systems on a dyno is not easy if the vehicle in question doesn’t have a dedicated dyno mode. This is required in order to be able to run the vehicle without its suite of safety systems on, since they would not allow its wheel to spin in a room, facing what is very obviously a solid wall.
The Rivian R1T doesn’t have a dyno mode, so when Aaron O’Neal tried to see how much power it actually makes using a rolling road, the vehicle was not at all happy. It did allow power to be applied initially, but you can clearly see in the video that it constantly cuts power and pegs the vehicle back.
Aaron doesn’t say what warnings popped up on the screens, but he does say that it was the vehicle’s collision control system that could not be turned completely off that hampered the test. It didn’t cut power completely or constantly - it just intervened every few seconds, it seems, but even so, the vehicle still managed to put down good numbers given the situation 526 and 563 horsepower.
