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Crazy brake issues while on track

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Old Nov 4, 2011 | 08:29 PM
  #16  
JDavenport's Avatar
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From: Columbia, TN
Originally Posted by AlwaysinBoost
One really odd thing I should mention is that i'm seeing some pretty severe pad taper in the REAR. By severe I mean the top of the rear pad is at about 25% material left and the bottom of the rear pad is about 75% material left. This is uniform with both the left and right side of the car. There isn't any front-rear taper of the rear pads. I also only have minimal top to bottom taper on the front pads and even less front-rear taper on the fronts.
This is really odd. Like the othere said, I would suspect ABS as the culprit in the one sided pull, but you really need to check this caliper over. I am fighting pad taper on my fronts (OEM Brembo's, XP12 f and r), but not a sign of it on the rears. Rears have never even gotten hot enough to discolor the Brembos and pad wear back there has been flat. You may have a sticking piston or other weirdness.
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Old Nov 5, 2011 | 10:46 AM
  #17  
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From: Wisconsin
FWIW I run the same exact pad combo 24/7 on mine never had issues with the rears over biting the fronts, In fact I was looking into for a more aggressive pad for the back to try and even out the braking some.

Keep us posted and thanks for the info.
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Old Nov 7, 2011 | 05:54 AM
  #18  
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From: Ft Lauderdale
Identical thing happened to me this weekend at Sebring, running XP12's front and rear. I will definitely inspect the calipers very closely.

I was entering turn 3 from about 105mph down to 55mph and the whole car shifted about 20 feet to the left. I pitted the that lap and inspected all the suspension parts and did find anything loose or out of place.
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Old Nov 7, 2011 | 06:13 AM
  #19  
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From: In da streetz
back from the track and I'm happy to report cleaning the sensors made a big difference. I only felt ABS a couple of times and when it did engage it wasn't anything dramatic like what I experienced before. What a relief.

now that the season is over for me I'm going to give the OEM calipers a refresh and see if I can't eliminate this rear pad taper I'm experiencing.

Thanks everyone for the help.
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Old Nov 7, 2011 | 06:25 AM
  #20  
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From: somewhere testing various tires, brakes, and suspensions.
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