Surely you can fit plenty more under there ?
I've 330x32 floating discs under 16" wheels with 4 pots ( not Honda obviously )
Really, fitting uprated pads to standard discs is almost a waste of time, they will not be compatible with each other.
The further apart you go, the worse it will be for the discs.
Even a much higher quality disc/bell arrangement could make a huge difference to braking performance, used in conjunction with the right pads.
Aggressive pads can actually create far more heat in the disc than some milder pads, so actually make the problem worse even if you think it's the right way to go.
There is also the risk that spraying too much water onto a hot disc could also lead to premature failures. It will be trial and error though
For all things braking...speak to Bob at
http://www.bgdevelopments.co.uk/contact-us
He will be able to build you something much much better than what you have.
Or a quick google says Wilwood offer stuff already ? Bob is mostly an AP guy, I'm sure the Wilwoods would be cheaper.
http://www.importtuner.com/reviews/p...ig_brake_kits/