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      01-04-2015, 10:44 AM   #1
Shooto82
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Brake vibration

I traked my 1M this weekend, was fun but until the brakes stArted to fade out, and it vibrate in the rear end. Is the vibration normal once the brakes over heats?
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      01-04-2015, 11:16 AM   #2
MDORPHN
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Certainly possible. If you overheated the pads, material from them could have been deposited on the rotors causing the vibration.

A more aggressive, truly track-worthy pad (that is designed to handle higher temps) -- once properly heated-up on track -- should clean the deposits off the rotor and you'll be fine.

Neil
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      01-05-2015, 12:11 AM   #3
///Munson
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Yes, as above. Very likely to be deposits. Commonly misdiagnosed as warped rotors. Although that is also of course possible, but IMO less likely.
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      01-05-2015, 01:27 AM   #4
Shooto82
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Any recommendation? Brake pad upgrade?
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      01-05-2015, 02:31 AM   #5
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      01-05-2015, 02:50 AM   #6
///Munson
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Be mindful that using very capable pads can often lend you the confidence to stand on the brakes so hard that you'll expose the next weakest link - boiling fluid in the callipers. If that happens, you'll wish the pads had faded first.
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      01-05-2015, 09:34 AM   #7
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Just to be clear, the vibration is likely to be from uneven brake pad deposits.
It's not so noticible with OEM pads but when race pads are properly bedded in they'll leave a visible coating of pad material on the rotor that increases braking capability.

Your uneven deposits will eventually wear off with OEM pads but it may take a long time. As Neil said putting on a set of pads with a more aggressive compound will scrub the rotors clean rather quickly. Might as well buy them to handle your next track event.

In my experience you can scrub them clean without going to the track as you're not trying to bed in the track pads; bring them up to a moderate temp with repeated medium speed stops instead of the higher temps needed to transfer pad material.
StopTech's website has a good tech paper on this too.
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      01-05-2015, 10:02 AM   #8
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Just sounds like you parked the car with overheated brakes. This will cause a large deposit to form on the rotor underneath the pad. Should be able to clean them off with aggressive driving. Next time, do a full cool down lap and let the brakes cool down before stopping. Also, do not engage the parking brake after coming off track.
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      01-05-2015, 10:20 AM   #9
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One thing that isn't mentioned yet is the fact that you could be on the brakes too long (common for newer drivers to do this) which can cause the pads to overheat and thus leaving deposits on the rotor.

Re-bed the pads and you should be okay.
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      01-05-2015, 11:22 AM   #10
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Exactly. Faster you go, the easier you are on the brakes.
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      01-06-2015, 06:53 AM   #11
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drill your disks regularly

Lots of people overlook the simple task of drilling out the vent holes in their disks, this restores the cooling efficiency of the disks and is a simple task which helps avoid overheating and damage to the disk such as horrible ridges and groove lines
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      01-08-2015, 10:13 AM   #12
Shooto82
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So changing to better pads could be a solution, cleaning the oem pads/rotator could be also a solution, and better breaking during a track session is a must.

Anything else I should be worry about ? Will the vibration damage anything else?
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