If you run your engine in during summer, obviously it will make it's own individual performance to carry on through it's life based on the temperature of the average air that is forced in. (Or does it?) Based on running at the higher temperature airflow during summer, do you think that this would have an effect on the way the engine would perform in winter? Would it take the 10° or lower temperatures of winter as a natural power booster through air molecules being more dense? If you can understand my rambling I'd be interested to know if this could explain why some people are getting high 220rwkw+ readouts from a stock phoon, when the average is more like 210rwkw, even when run on different dynos.