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Essentially, but there are many tuning strategies. It doesn't mean less power, just how it's requested. Even though Stage 1 OTS may feel less stout from the driver seat in certain conditions, it's surely making more power than your stock 9psi map.
It explains why some other things are the way they are in the Z4 map. It requests more as a %, but has less to get as a maximum than 335is. I had a snappy pedal map once on a high torque tune and it was an annoyance to drive. No matter how lightly I tried to accelerate from a stop, it was like launching at the track. Not great when you're at a light behind a cop or trying to go up a minor incline at cruise and wind up accelerating at full boost.
335is and Z4 normal modes are the same. Sport mode is another story. 335is top, Z4 bottom. X axis is pedal position, Z is % torque requested. Basically, Z4 is WOT at between 35-40% pedal in Sport and has no taper as RPM increases.
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