use of MAP in FI calcs

[Len Sabatine]

   "Normal" calibrations = Sea Level to 4000 ft Elev. Or so it's stated. 
Then there's
    Altitude and Exports. Death Valley , Mt Everest , South Pole local 
calibrations anyone ?
    Radical  change should get BLM in a dither!! Hey ,maybe running out of 
air is just what
    a big cam Cal needs [ Hint].
      Len

>I left a thought out of my last post...
>
>If indeed the BARO is not re-calculated unless the car is turned off and
>back on, What happens when you start the car at the top of a mountain, and
>drive down to the bottom then drive 200 miles?  lotsa BLM correction?
>
>food for thought.  Maybe why they changed it later?
>
> > Subject: use of MAP in FI calcs
> >
> >
> > I've noticed that in most ECM's all the tables that use MAP as an index
> > stop
> > at 100 kPa.  Since its conceivable that MAP could go above 100 kPa on a
>high
> > pressure day at WOT, I'm betting that the computer normalizes it with the
> > barometric pressure as in mapbar = 100 * map/baro. This would account for
> > the
> > day to day variation in barometric pressure and normalize mapbar so that
>it
> > better represents true engine load.  Have you guys seen any similar
> > operations in your disassemblies?
> > jc
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