Here is quick peek at some of the research being done for the upcoming episode: "Ultimate Air Filter Flow Test"
In this episode I will be measuring the air pressure at wide open throttle between the panel air filter and the MAF sensor.
-AND-
I will be data logging directly from the intake MAP sensor to capture the pressure inside the intake manifold.
(I can't use the OBD MAP PID since it is off by 6 KPa due to the analog multiplexer used by the ECU)

Sooooo, I needed to figure out the formula (aka transfer curve) of the factory MAP sensor.
I used a precision absolute pressure sensor with a known transfer curve, applied a common vacuum source and measured the voltage output at multiple pressures.
Once the weather warms up, the data collection will begin!

 

That setup makes my inner geek very happy. My outer geek wants to help...