Connie_rider. You asked about adjusting for altitude. Well I just did it.
Wanted to use the MAP sensor that came with the Kawasaki throttle bodies.
To do this I lifted pin 1 of the existing speeduino MAP sensor and connected the output of the Kawasaki MAP sensor to the pad under the lifted pin.
I picked up power and ground for the sensor at pins 2 & 3.
I ran pin 1 of the old MAP sensor through a 470 resistor to the analogue pin A05 of the arduino.
This now makes the Kawasaki sensor which is mounted on the throttle bodies the main MAP sensor for the ECU and the original MAP sensor is now a
barometer. To calibrate the Kawasaki sensor I set the 0 volt setting to 2 kpa and the 5 volt setting to 125 kpa.
With these settings the MAP and Barometer meters tracked each other. So now the ECU can check the barometer every couple seconds meaning I can Ride from Denver to Tampa Bay without worrying about the changes in atmospheric pressure.
https://youtu.be/gyYeJQyZTVQ