^ no no no.. only the idle cells, it's just a way to determine the dead time at x voltage.
So what you do, set the VE to 80 for cells around idle 0 to 50kPA and 0 to 900 rpm. Start car, monitor the voltage then adjust the dead time till you hit stoich.
Of course all other VE cells will need to be adjusted to suit as the base map isn't really ideal.