I have a 04 automatic with a bullydog powerpup on it and even stock it takes a really long time to reach 325 degrees with the ac off and eveything.
Any ideas??

 

Cool down times can vary in a large degree.

My truck can take seconds sometimes or I can sit there for 20 minutes. It all depends on what you just did driving wise.

I drive a stick, but I found at least with my truck, all I do is just downshift and give it a nice big gulp of air as I'm coming to a stop and it makes a big difference in cool down times.

Outside air temps can make a difference also so keep that in mind too.

Jeff