Originally Posted by Berzerklo
^This. OP what you are asking for is impossible to accomplish with a simple tuning re-program. To do what you want would require a physical modification of your waste gate as well as a custom tune. Even then I don't think you will realize better fuel economy trying to keep your car moving at 80 MPH with no boost.
I believe you're right. I use cruise control for nearly all my freeway. Just thought the motor with low/no boost would burn leaner. I'm sure the eco map will pick a few MPG's up and that will offset my heavy footed fun