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      06-03-2010, 11:56 AM   #5
Second Lieutenant
runnerx's Avatar

Drives: 06 M roadster; 06 330i 6spd
Join Date: Apr 2007
Location: Bay Area, California

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Originally Posted by SpiralOut View Post
I had some problems with them at the track last week.... after a few hard laps they were juddering like crazy on hard braking. Every session they would be fine for 1 to 2 laps then shaking would start again when they warmed up. I assumed it was just because I hadn't bedded them good enough. Car has 3000 miles and about 2000 on cool carbons. After coming home I took pads off and they were glazed over pretty bad.... I guess it could be improper bedding that didn't prepare them properly for the heat at the track?
I use Ferodo and never have an issue. My guess is the compound on cool carbon couldn't handle the heat; it most likely started to melt and left a lot of residues on the rotor, which caused the judder. I had the same issue with Axxis ULT but judder should go away after a few days of driving or when the residues wear off. Go get some real track pads from Hawk, Ferodo, or PFC.
2009 BMW X5 4.8i
2006 BMW ///M Roadster 6spd manual

2006 BMW 330i 6spd manual - gone

Last edited by runnerx; 06-03-2010 at 12:41 PM.