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Hi Zimbali, The data I have is from my own experience. I have tuned more than 400 cars on a dyno. I can tell you that most of the claims of most of the chip tuning companies are exaggerated. Especially in the newest cars there is no improvement to be made unless the engine configuration has been...

10% is not common and very unlikely.Most of the time the improvement is around 5% or less.In most ecus it is not possible to change the target a/f ratio from 14.7/1, that is because the standard oxygen sensor is designed for precision at 14.7/1 and the ecu correction algorithms are designed with...

Usually you dont have to change the part throttle closed loop fuel maps. Most ecus up till now worked open loop at full throttle and most didnt have optimised a/f ratio for power. Very common to see a 11.5 a/f and even 10 a/f on a turbocharged stock car. The reason for this rich mixtures is...

If you have specific questions concerning the me7 I could probably answer them. One warning though, even with an realtime emulator and diagnostic equipment it is extremely difficult to figure out the meaning and function of the various maps. You should read the Bosch ME-Motronic technical...