Use of MAP in FI calcs

[Len Sabatine]

     Baro ? Weather correction , ratio of atmospheric pressure in front of 
throttle valves , versus
    percentage of pressure behind throttle valves, make appropriate fuel 
corrections as part of
   adaptive learning process on daily startup / restart process. Don't have 
a clue how this is
    connected with Exh scavenging other than normal weather tuning changes 
by default process
    of atmosphere in a state of flux. Everyone's doing the best they can to 
compensate. How much
    of the atmosphere is entering the inlet manifold  seems the thinking 
behind it all , each start / run
    cycle.
    Len

>Ok, so baro is either sampled at power up or in some cases continuously 
>sampled.  I agree with Ludis that what is needed particularly in the mass 
>airflow calcs is the pressure inside the manifold, not outside.  So.. is 
>the only purpose for baro then the correction for the effect on exhaust 
>scavenging that someone mentioned? I would think that a few kPa variation 
>in baro would have minimal effect on scavenging.
>
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