Why measure the wastegate?
A position sensor on the wastegate shows how far the valve is actually open, moment to moment. On a twin-turbo engine it's a quick way to diagnose uneven manifold pressure between banks, because you can see if one gate opens earlier or further than the other. On any turbo setup, it shows how the gate behaves and flows, which helps when boost won't hold or creeps.
Calibration
NSP needs a calibration that turns voltage into valve position. Ideally it comes from the wastegate maker. If not, do it on the bench with the spring removed: record the voltage fully closed and fully open, plus a few points between, and enter them. Without the spring, the valve moves freely and you can check each position.
Wiring
The sensor connects to an analog input. Any spare AVI will do. Turn the pull-up off for this input, as recommended, so the pull-up doesn't skew the position reading.
Sensor 1 and 2 are set up the same way, one per gate. Log both beside wastegate pressure and manifold pressure to see the full picture.
