Brake Issues

[yaoxiao4]

Hi,

I've been running into a lot of brake issues lately (mostly on Laguna Seca)

I installed the Z1 2 Piece fronts and 1 piece performance rears with carbotech xp 10/8, with SS brake lines and rbf600 fluids.

a couple months ago I ran with that setup and it left nasty marks on the rotors and I had to try to clean them off (rebedding), and it made loud screeching noises after the track day, but since I didn't feel any vibration or fade I just sort of ignored it

last Friday I ran there again and this time, the first session my rotors again had very nasty marks all over them. In the second session my brakes felt spongy and shortly after pedal went all the way to the floor with barely any stopping power (boiled fluid?). I waited a few hours before next couple sessions and the car ran fine. However the marks are still there.


My question is do you guys run into this issue too? if so other than brake ducts / control arm deflectors is there anything I can really do?