Originally Posted by donbrew

PID is a request to the computer for information, A sensor is hardware. So, if you know the right PID to set the RPD to you can get any bit of info you want. That is a simple answer, does it help?

I seem to remember somebody saying that you can send PIDs with the RPD, I don't know.

What they are saing in the CobaltSS thread is that the sensor is mounted on metal and the metal is very close to the heat producing turbo, so it is actually reading the temp of the metal tube, not the temp of the air inside.

Originally Posted by RJ_RS_SS_350

If it were me I'd do some testing first. See if your HP or torque has improved, see what's happening with your fuel economy. The increased IAT may be messing with your timing a little.

Originally Posted by DrLoch

From reading it seems that moving IAT 2 closer to the throttle body and engine is causing what you are seeing. What impact that has on performance I can't answer. HPTuners which I use, doesn't allow access to a number of tables the the ECM uses for fueling, boost control and timing. But, if there are 2 IAT sensors it stands to reason there is some method to the madness or there wouldn't be two to begin with.

Same reason for 2 boost sensors, although I can somewhat understand that.