you already said the project...if the lim smoke is in the map function, you can't calcolarti nothing in afr...too many variables:air temperature,density,pressure, baro,moles per milligram according to the parameters above citiati,etc...
you need to improve the lim funmi in %, if the output Z is in iq.
here you are a bit of an advantage because the output Z is in Nm, then think of it as a lim torque as a function prress turbo..