Is your car good to drive? Does it pull well? Was the curve smooth? People are so obsessed by figures that they lose sight of how the car is to drive after a map.
''I have 300bhp from a stage 1!'' (By the way, this isn't referring to you, OP!)
Well done you. Now your engine is going to lunch itself and it probably drives like a bag of ****.
Altering the fuelling parameters to within an inch of their lives isn't going to aid longevity. With decent fuel (i.e. super) you can probably eak a few more ponies after adequate adaptation time, so personally I'd be very happy with 250+ bhp. It's probably a more realistic figure than many of the numbers bandied around on this forum.