after reading some threads on brake performance and seeing some of the comments in this thread, i thought i would add my 2c.
First of all, bigger pads are always better.
Forget the stilleto principle, you are turning motion into heat and a smaller pad will over heat quicker than a larger one. The smaller pad will end up riding on a cushion of gas before the larger one. This can be reduced by drilled and grooved rotors.
Second, putting the stock rear pads further out with the 278mm CSVT front rotors means that you do have greater leverage on the rotor, but the outer edge of the 278mm rotor travels faster than the 253mm rear rotor at any given road speed and therefore creates more heat. Brake fade again becomes part of the equation especially when you are expecting greater performance from your brakes.
So, despite what you may have read, the rotor swap is not a straight win win swap but a compromise to the cost of larger calipers and pads or two pot calipers.
I have this mod on my car and noticed accelerated pad wear.
I'm looking around for a larger caliper setup that works without too much alteration ...... anyone ? ....G.