Hi, having a bmw e90, I can say that on these 2000cc (163cv and 177cv) ? can earn a lot of single remapping...obvious that if you overdo it you have to deal with the reliability? in the long term (especially remembering that these engines suffer from gi? from the stock of the turbine and clutch).
I have heard in the past of people who have brought their 177cv about 220 hp (and the 163cv about 210cv) but at least on paper I think that, especially with the dpf fitted, these increases in power are pretty motivated to be defined as reliable (without dpf the situation is much better because of the discrete reduction in the temperature of the exhaust, with the obvious benefits to the turbocharger).
In the end, however, I think that, beyond the numbers, there? that really matters ? how are the data increases.
Returning to the theme, how ? the state gi? that said, on the edc17 worked in the tricore...I have a galletto v2 clone but I am of the opinion that, in view of the delicacy of the ecu in question, it would be advisable to use instrumentation official