A rudder pedal works different than a brake, clutch and gas pedalen because of the potentiometers. On the rudder the left and right are one and they use one potentiometer (10Kohm), while the left and right toebrakes, uses 2 potentiometers (10Kohm), one on left and one on the right toebrake.
So the left and the right rudder share one potentiometer 0% > 100% or -16383 to +16383, 0 is the center from there it is deflect to the right is + and left is -.
Do it is possibble to configure youre racingpedals to rudder it is not very comfortable to work with. How?
You have to calibrate the gaspedal. Then press it half way set to zero. From there you have to go to release and set axis -100 to 0.
Then press it half way set to zero. From there you have to go to press all the way up and set axis 0 to +100. The clutch and brake pedals can be configured to toebrakes.
To control this is not very well to handel. Because if release your foot from the gaspedal youre plane will yank to the left. While with rudderpedals it stayed in the center.
Hope this help to contribute to explain the difference. Feel free to experiment with this on youre racing pedals.