Brembo GTP Brake Package???

[demo]

Has anyone experienced rotors warping with these packages?

[ttweed]

Why do you ask?

Read this tech article by Carroll Smith at the Stoptech site. His contention is that warped rotors are a myth. The symptoms that are interpreted as warping are actually uneven pad material deposition on the rotor.

[demo]

That was a great article. I was advised, if I install diferent Manuf pads, and bed in, they would remove transfer material.
I did that, it was good for a few hard stops, then it came back.
Even on street, after a few stops the judder gets really bad.
Now what?

[ttweed]

Check your tierod ends and rack for steering play and measure runout on the rotors. Given that the hub and wheel flange are flat and in good condition and that the wheel bolts and hat mounting hardware is in spec, installed correctly and tightened uniformly, Blanchard grinding is your next option, if putting semi-metallic pads on for awhile didn't clear it up. You may have cementite formations already, and the only real fix is new rotors.

From the article:

"The only fix for extensive uneven deposits involves dismounting the discs and having them Blanchard ground - not expensive, but inconvenient at best. A newly ground disc will require the same sort of bedding in process as a new disc. The trouble with this procedure is that if the grinding does not remove all of the cementite inclusions, as the disc wears the hard cementite will stand proud of the relatively soft disc and the thermal spiral starts over again. Unfortunately, the cementite is invisible to the naked eye."


"The driver can feel a 0.0004" deposit or TV on the disc. 0.001" is annoying. More than that becomes a real pain. When deposit are present, by having isolated regions that are proud of the surface and running much hotter than their neighbors, cementite inevitably forms and the local wear characteristics change which results in ever increasing TV and roughness.

Other than proper break in, as mentioned above, never leave your foot on the brake pedal after you have used the brakes hard."