The shop hooked some kind of electronic gizmo into the computer to change some of the parameters...he put the car on the dyno to get a baseline,changed a few things,dynoed again...repeated this process for about three hours until he had everything set to optimum.He gave me the gizmo when he was through so I could load the stock tune back in if the car was going to the dealership so as to not raise any eyebrows with Ford .The biggest difference I can tell,besides the increased performance,is the boost off idle is almost instantaneous.
