umn

Thanks for the interesting article. As to the pad/disc issue, I just called up the Porsche factory in Stuttgart and ATE (Continetal Teves) if Frankfurt, one of the foremost brake disc manufacturers in Europe.

Both recommended changing the pads when renewing the discs. The issue with worn pads seems to be that the worn pad will only make contact with the disc in a few sports. This obviously results initially in reduced braking performance, but the real issue is that these spots get very hot, which can change the material structure in both the pad and the disc.

If you absolutely must keep your old pads, ATE recommended to be gentle with your braking for the first 500mls or so, until the worn pads make full contact with the new disc. This seems to contradict what was said in above article. Also, according to ATE, deposit of brake pad material on the disc is not much of an issue with modern compounds.

NB: All this information is concerning road use. Track use might be a completely different story.

Cheers,
Uwe