Originally Posted by JohnC
The difference between the Ram and a Jeep is not the program. The Jeep has a smaller engine bay. Because of this it uses a more restrictive intake and exhaust. If that's all it was, any aftermarket tuner would be able to get over 400hp on a jeep with no other mods. The best way to compensate is to help the exhaust and intake breath better. A tune will help it even more.
I am not disagreeing with you at all. I realize there are a lot of physical differences between the two. It is however possible to get 390 Horsepower and 407 Foot Pounds out of the engine on the Jeep using the in place equipment with a program change.
The Conversation was more about them not offering it in this particular version even though likely Chrysler doesn't actually have to change much to do this. Mind you the Durango Police truck Milous just posted in the 2014 Durango thread is exactly the type of vehicle I have seen them run these types of programs in.
Impala Police cars ran a different engine program with much higher horsepower and no speed limiters. They never changed anything on the engine to make this happen. However due to changes in emissions standards, this type of modding by the manufacturers has gone away mostly.