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9.8 is the base factor. A whole host of other factors are included in the actual lift value - adaptations, torque adjustments, etc . so just because the WOT map says 9.8mm, doesn't mean its opening the valves exactly 9.8mm.
Throttle opening has nothing to do with it. On the N52, the throttle plate is open 100% at 60% pedal value - the N55 will be similar.
Stock 330i tune maxes out at 9.7mm. 325i and 328i have less but they are detuned.
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