Quote:
Originally Posted by 86league
Hi - Brake question for those in the know...
HPDE this weekend and my brakes developed a moderate pulsation under light to moderate pedal pressure, but very light (or no) pulsation when braking very hard (near threshold).
Swapped the Carbotech XP10's out with the stock pads tonight after I got home and with a quick run, the stock pads seem to have a very very slight pulsation - but you almost have to be trying to feel it...
My first thought was uneven transfer layer - but after a bed-in procedure between sessions, I had the same issue when I went back out. My next thought was a warped rotor (or rotors) - one reason I swapped pads - wanted to get a look at things.
Attached are pics of the rotor right after I took the XP10's out, and the pads - the black areas on the pads are just brake dust - it wipes right off. Does this support a warped rotor?
Otherwise - how do these look - is the dark area at the center of the rotor indicate I'm only getting good contact for that ring vs. the whole rotor surface?
Thanks for the advice...
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I am also getting pulsing under light-moderate brake pressure since the last time I did brake work. When I say pulsing, like if I am coming to a stop and put moderate pressure on the brake pedal, I can feel the car slow down like I am modulating the brake pressure. It's not a vibration or ABS, just a modulation in stopping power up and down.
I noticed this started when I swapped my rear brake pads from EBC yellow to OEM spares for the winter and took out my BP10 fronts to check them and found they still had enough life left so I just put them back in. I was going to swap them but I had issues getting the pistons to go back in so I let them go.
I am of the impression that warped rotors/uneven brake pad deposits usually result in vibration when braking, not this pulsing brake modulation that I am getting.