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Pad Deposits or...?

Just finished a track day this weekend with my new brakes (Akebonos and Carbotech xp10/8). I made sure to go through a proper bed-in process at the time of the

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Old 07-21-2020, 11:49 AM   #1 (permalink)
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Default Pad Deposits or...?

Just finished a track day this weekend with my new brakes (Akebonos and Carbotech xp10/8). I made sure to go through a proper bed-in process at the time of the install, but at the end of the track day when I looked at the rotors, I could see some "smearing". As far as driving feel, I never felt any wheel vibration under hard braking. So, I'm not sure if this is pad deposits, but I wanted to get some expert opinions...





Thanks!!
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Old 07-30-2020, 04:01 PM   #2 (permalink)
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That's normal after a track day. You may need to get the rotors turned after several events, depending upon how hard you track the car. You could add some brake vents to increase cooling. I also recommend Castrol SRF brake fluid.
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Old 07-30-2020, 06:58 PM   #3 (permalink)
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Thanks! I was planning on street driving the car every once in a while in between track days and hoping the XP10s up front remove any deposits that may have formed. Other than that, I have the duct kit for the fronts.
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Old 07-31-2020, 08:24 AM   #4 (permalink)
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Heat spots IMO.

"Heat spots (Fig. x) are a tell tale sign that your brake rotors have uneven brake pad deposits. How do they affect you? Heat spots will lead to brake harshness, vibration and reduced structural integrity. Heat spots on brake rotors occur when brakes aren't broken in (bedded) properly and the brake pad deposits on the rotor accumulate and eventually turn into a compound known as cementite. You don't want Cementite on your brake rotors. Cementite is compound that is very hard, overly abrasive and doesn't allow the rotors to cool properly. As a result, Cementite heats up the local area around itself growing in size and reducing the cooling capacity of your brake rotors.
Prevention: Properly breaking/bedding in your new brake rotors is vital to the longevity of the rotor. See our Brake Rotor Bedding Guide.
If this is caught early on, you can possibly remedy it by bedding in your brakes with a more abrasive pad, or resurfacing your rotors. If the heat spots are extensive, you will need to replace your rotors."
https://brakeperformance.com/inspect...brake%20rotors.
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Old 07-31-2020, 12:25 PM   #5 (permalink)
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Damn, I hope not. I was pretty intentional/hard on the brakes during the bed-in process so I'm surprised if it still turned out that I didn't bed it correctly. And my brakes were smoking pretty heavily for a while afterwards...

Out where I live, it's hard to find an open enough stretch of road to go through the bed-in procedure without looking like a jackass. For those of you who live in suburb/metro areas, any recommendations on how you bed your brakes?

Also, how many hours of cold street driving do you think is necessary to remove uneven pad deposits?
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Old 08-03-2020, 06:27 AM   #6 (permalink)
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Quote:
Originally Posted by alanyluan View Post
Damn, I hope not. I was pretty intentional/hard on the brakes during the bed-in process so I'm surprised if it still turned out that I didn't bed it correctly. And my brakes were smoking pretty heavily for a while afterwards...

Out where I live, it's hard to find an open enough stretch of road to go through the bed-in procedure without looking like a jackass. For those of you who live in suburb/metro areas, any recommendations on how you bed your brakes?

Also, how many hours of cold street driving do you think is necessary to remove uneven pad deposits?
Don't worry too much about it, it's pretty hard to bed in brakes for track duty on the street. Do the best you can, I have similar issues with bedding, early morning industrial parks work best. Driving won't really get rid of them.
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Old 08-03-2020, 01:52 PM   #7 (permalink)
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Sounds good, and thanks for the suggestion! I'll keep my eyes open for any changes in braking behavior and just go from there!
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