That's known as heat soak. Not enough air was moving through the filter box to keep it cool so the heat from the engine started to heat up the intake. Completely normal don't worry.

 

Like the above post stated, nothing to worry about, Unless, you get moving along at a good speed, are not in stop and go traffic and the AIY temps do not go back down or stop dropping.

Great, thanks for the feedback, I really appreciate it!

 

Like the above post stated, nothing to worry about, Unless, you get moving along at a good speed, are not in stop and go traffic and the AIY temps do not go back down or stop dropping.

 

The only other option is to install a 180°F thermostat. You will still get heat soak but everything (IAT, fluids, etc ...) will be approximately 20°F cooler. The thermostat itself is cheap enough, and easy enough to install, but you need to change the electric cooling fan settings in the PCM; and to do this you need a DiabloSport programmer.
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Charger's used a short IAT probe, which allowed it to easily get heat soaked. I installed a challenger IAT, which sticks further into the air stream. Made a huge difference in the readings.

 

Interesting stuff PD. Are they interchangeable from model year to model year or do the IAT sensors cover a range of years?

Are the IAT readings going to affect how much timing and fuel the PCM throws at the engine or is it just a benefit from an accuracy standpoint?

 

165 seems high to me. I'll have to watch my intake air temps more closely this summer when it gets over 100. Yesterday I was stuck in slow moving traffic for about 20 minutes on the highway. It was 87 outside and the highest the intake temp hit was about 125 with the stock airbox (which is much better than the AF dynamic intake I just took back off).

 

Thanks for the info. So did you wire in a new connector to use the Challenger IAT?