Interesting P&H Driver Link and a MAP Question

[Bruce Plecan]

From: "Ken Bauman" <303print at northrim.net>
> I'm hoping someone would be kind enough to give a good explanation on why
some
> MAP based systems also include a second pressure sensor for ambient
pressure?
> Several setups I have seen use one pressure sensor, usually a GM MAP
sensor.
> Yet others use two pressure sensors, one for MAP and a second for baro.
What is
> the advantage disadvantage of doing this?

Much better tuning resolution.
In your typical fuel map the increments are 5 K/Pa, and there isn't enough
*room* from 95-100 K/Pa to have any real resolution in there for baro,   and
the same for timing
Bruce


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