Brake fading

[Bubble_Drift]

I normally don't brake hard since I use my hachi for daily driving and drifting.

Last week I went driving on a "touge" and went full out.
After 15min or so, on the way back down I was braking and shifting down to second when I notice that the pedal is almost on the floor, but the car isn't slowing down as it should be. Quite scary because it was a tight 180degree turn.

This is what I got:
New stock pads
Old disks, but in good shape.
New dot4 brake fluid
New Goodridge lines.

Any advice to make the brakes better?