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+1 ^
from what i hear the N55 is going to be alot harder to tune, bmw isnt going to make the same mistake they did with the N54, putting it out there and then addeding a new ecu and software to stop tuning. ( software 29.2+ and MSD81 DME/ECU) They are going to go hard from the bat for anti-tuning, and tuner codes.
As for power, anti-tuning things bmw will put into the engine might limit the amount of power tuners can extract from the engine possibly.
Of course valvetronic is going to be a PITA to tune, and by the time this engine is even where te N54 is, its going to be a god 2 years.
I think the bottom line is the N54 tuned, will make more power than the N55 will. Of course this is speculation, but it has been hinted by tuners and other good sources.
V4, Jb3 2.0, etc. have come so far in 3 years.
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