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Strange Brake Issue after Track Day


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i have separate brake pads on the front that i swap out for track days. the rears are street pads that stay on at the track. my last track day, i cooked my track pads pretty bad. i'm still having problems with the street pads, though. i'll try to explain how it feels as best i can.

when the car is cold, the pedal requires a LOT of pressure to get the car to stop. its as if the front pads (Mintex Street, by the way) just won't grab. if i do a FIRM decel from 70 - 20, the car doesn't seem to slow down much at first. then, once they heat up, they stop the car like a champ. after 1 - 2 firm decels, everything seems fine. its as if the brakes just aren't working when they are cold (normal for race pads; not for street). also, they're not pulling to one side or the other; just not grabbing.

here's what i've done:

new pads all the way around (Mintex Red)

new rotors (rear)

hone rotors (front, cross-hatch)

flush / bleed with power bleeder, ATE fluid

pressure test (no leaks)

inspect master cylinder (no visible leaks)

verify caliper orientation (small piston leads)

verify caliper piston function

replacing front rotors today just for the heck of it, but i don't think it will make much difference. any ideas?

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