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      09-24-2020, 02:32 PM   #45
//TMT
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Drives: 2020 X2 M35i, 2005 Volvo V50T5
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Quote:
Originally Posted by xcelir8bmw View Post
Why wouldn't the OBDII boost specs show 22.8 MAX, while the TDI unit pushes more above it?
Because OBD-II is simply a request to the engine controller to report the boost it is measuring. Normally this number is directly measured by the controller from the manifold sensor.

However, the manifold sensor is no longer connected to the engine controller. It's connected to your new TDI unit, which is reading it, and remapping it to its own algorithm. The TDI then emulates the sensor and provides this completely different remapped value to the engine controller.

How the TDI manipulates these values is their proprietary domain. And, it is very unlikely to bet so simple as to be 22.8 minus X.
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