MAP cars respond very well to boltons and a performance gain is a gain even untuned and unsafe wont take the gain away just from being MAP , Like a MAF you can run out of MAP (counts / voltage) but in most cases that takes boost and you just change to a 2 BAR or 3+ BAR MAP depending on the amount of boost
Speed density systems calculate the density of the air by measuring the temp of the intake air and manifold psi, with the density of air known the engine ECU then looks up how much air it expects to be moving at a specific engine speed and manifold psi then calculates fuel , Fords have a strange way going about the fueling aspect but it works
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