Here’s a surprising result, the chart shows the pressure in the signal line going to the N75 valve. The other end of this line is what taps into the turbocharger compressor housing.
![K03 vs K04 Compressor Housing Pressure](https://myaudis4.com/wp-content/uploads/k03_vs_k04_compressor_housing_pressure.png)
The K04’s are operating at a higher Manifold pressure, but the reading from the compressor housing is less than what the K03 readings are for a K03 tune until about 5000 rpm, where the K03 tune drops manifold pressure significantly.