I leave ours in normal most of the time. ECO isn't as much as a neuter job as it is on BMWs so it's fine for me but I find turning the silly knob more of a pita than pushing a button like I do on the BMW (understandable for the ridiculous number of drive modes though).
Sport is definitely more fun and seems to really let the turbos work, I don't feel like throttle response is super lazy but I do think you lose about 3psi per mode (maybe even 4-5). I haven't tested it but it certainly feels like the wastegate operates differently, you can especially tell if you have modified your BOV. When lifting in sport you get a massive whoosh, in normal it's just a soft psssh. Haven't tried in ECO but I'd bet it's even less.
Sport is definitely more fun and seems to really let the turbos work, I don't feel like throttle response is super lazy but I do think you lose about 3psi per mode (maybe even 4-5). I haven't tested it but it certainly feels like the wastegate operates differently, you can especially tell if you have modified your BOV. When lifting in sport you get a massive whoosh, in normal it's just a soft psssh. Haven't tried in ECO but I'd bet it's even less.
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