[pbonsalb]

And track pads might stop worse than stock until you get enough heat in them to get into their operating range. Pad materials have operating ranges. If you are driving around town, you may not reach the low end of the range of track pads. And if you track on street pads, you may exceed the high end of their operating range.

I am not sure we know what brake issue BEATO suffered during his 155-35 slowing. Was it pads? Fluid boiling? Insufficient rotor capacity? Had he already overheated the brakes during the session? Does he use the brakes too much? Should he just try pads meant for the track first, plus a fluid change? Or is the only solution a $6000 front and rear BBK?

My take is that he is overthinking piston area. All the aftermarket kits are designed to provide similar braking force to stock. They cannot deviate much from stock because that changes bias and ABS.