Last season during a practice in a summer race I believe they went over how Tony was struggling in that particular session so they threw in Harvick's set-up and he got slower. I think its a combo of Tony losing a bit of his magic and his overall team/CC aren't up to snuff aka he doesn't have Rodney Childers - that guy builds rockets right off the truck.from what I have heard engines aren't built for specific cars they are just built and randomly end up at whatever teams. The difference between a good driver and an exceptional driver on the track isn't that much. its mainly how great the car is and what its capable of. Tony should be able to run ANY setup from any driver on the track to within about 3 or 4 tenths of what anothers best time in that car is. simply put tony should be able to run a havick setup to certainly within a half second on the track. half a second off is quite a bit but tony was off more than that. Tony didn't change crew chiefs after last year. Thats why I think tony the driver isn't up to snuff right now.