2.5" gets good results. I was wondering was Dan using the 13T as that would make a good comparison or did you weight the wheels by any chance. Dans dyno showed insane boost looks like 19psi at 3000rpm, realistically I think for fuel economy would need 2 boost settings for city driving would be more comfortable with around 15psi at 3000.
This make no sense. If you have a wastegate with max 19psi, you can still get 15psi at 3000rpm. You simply end up using less throttle. So example...19psi is at 100% throttle...15psi is at 70% throttle.