When the air is cooler and heated up in the cylenders, it expands at a much larger rate. The ecu compensates for this and you get a little extra HP.

There is a "reason" why timing is pulled back in hotter temps. The air is thicker, which means once it is heated up it will not expand as much as cooler air. Which manes spark must come at a different time. Sitting in 100 degree traffic vs 40 degrees on the highway use different fuel maps. Fooling the ecu to thinking its 40 all the time will result in a very short lifespan of the motor. You will be doing damage to the motor and not even know it until its gone.

I do not suggest doing any of these ECU modifications alone. Any modifications are not covered under the factory warranty. That includes the one mentioned above. That is just a warranty to cover the "chip". If your motor goes, DCX will void your complete warranty and you will be out parts / labor on a new motor.

Want a faster crossfire? Purchase the SRT6 next year. It's cheaper than replacing a motor.