Brake disc help please?
Discussion
Can anyone help? I have a 4.5 Cerbera that has had the standard AP Racing front discs replaced by the new RR/Tuscan cross drilled discs because they were warped (and by then too thin to skim). Now they have warped again - within 750 miles! I have a big argument going on with the factory because they say that I am the only person in the universe to have warped the new style discs as fitted to Tuscans. Is this true? Has anyone else had a problem with the new discs?
Interestingly, the new discs' venting vanes are angled, implying that they are/should be handed. In fact, a chat with AP Racing confirmed that if the vanes are angled then (depending on the angle) they should only be fitted to the correct side of the car. In my case, both the warped pair of discs (that have now gone back to the factory via the dealer) AND the replacement discs that I had to buy (because the factory refused to supply free replacements) are near side brakes - ie all four discs are identical and all four should be fitted to the near side. The factory say this makes no difference.
And before you ask, no I didn't do a track day and yes I have run them in properly.
Interestingly, the new discs' venting vanes are angled, implying that they are/should be handed. In fact, a chat with AP Racing confirmed that if the vanes are angled then (depending on the angle) they should only be fitted to the correct side of the car. In my case, both the warped pair of discs (that have now gone back to the factory via the dealer) AND the replacement discs that I had to buy (because the factory refused to supply free replacements) are near side brakes - ie all four discs are identical and all four should be fitted to the near side. The factory say this makes no difference.
And before you ask, no I didn't do a track day and yes I have run them in properly.
i recently had a cerbera in for the same problem had the discs ground and they lasted about 200miles on further investigation i found that the garage that had fitted the new uprights hadnt cleaned the corroision of the bearing carrier mounting faces also they had got the carriers off the old uprights by beating the s**t out of the flanges i replaced these and cured the problem
If you check the forum out I remember reading somewhere about this subject and there was a link to a website run by Carroll Shelby. He says that brake discs do not warp, it is a build up of pad material due to the pads and disks not being run in properly. Pads and discs need to be cycled properly to run them in, your symptons sound exactly like this.
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