The results from the intake duct testing prompted some questions about the temperature inside the engine compartment near the intake manifold.
While the specific condition being asked about was what the temperature inside the engine compartment would be with the duct open versus closed, and that was not the objective of the test, previously measurements have been made in the area of the MAP sensor that give some idea of what the temperature under the hood is like.
Normally the GTI is equipped with an Eventuri intake that leaves the passenger side of the intake open – shown below.
With the passenger side open the air temperature in the area of the MAP sensor is shown on the chart below.
