With regard to question 7
Tuners such as Procede(Vishnu) also do quality engine management for the entire ECU as well as increasing the boost. Based upon their N54 and N55 chips I have not seen a blown engine from a responsibly modded car (no meth/nitro) that is driven hard, but not beaten to death.
I know that Procede and Burger do hundreds if not thousands of man hours testing and datalogging on the chips before an initial version is released. That being said, Chips are not without their bugs and sometimes firmware updates are needed to ensure optimal operational efficiency.
My personal opinion would be to wait until a stable tune comes out for the N63. Let the tuners test the capability of the engine before you put your car on the line.
-Rich
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