If you set the EFIS Altimeter to zero feet the Baro on the EFIS should match the Manifold pressure.

We have three different manifold sensors that can be selected. Since you are not using our sensor will have to guess what you actually have.

1. Select P/N: 41201 Turbo and press SAVE.
2. Return to the EFIS main run mode and set the Altimeter to zero feet.
3. Read the BARO value on the EFIS screen at zero feet.
4. Return to the Manifold Calibration menu.
5. Use the Shift Adjust setting to make the Manifold read the EFIS Baro value at zero feet.
6. Press Save