Choosing the correct AFR

Hello

At the time 03.13 you are showing lambda parameters at the Full throttle, and I can not understand why at the moment of full throttle engine RPM hasn't increase.

Can you tell me where is a magic? Or you can make a limit for the rpm?

It was probable video'd on a rolling road/dyno' which could hold a constant speed - check out eddy current and water load dyno's.

Many, cheaper, dyno's are the inertia type where a weighted roller is spun by the tyres and the power is worked out from the torque required to accelerate the roller to speed.