All brakes make a noise; it's just usually at a frequency that the human ear can't hear (think about it; what would you expect placing any material againsta fast spinning steel disk). That said, the ability to hear the brakes is usually caused by the pads vibrating although brake pad dust and rough disk can also be contibutors)
Ways to fix it are:
a) Use CRC Stop Squeal (pink adhesive goo) available from Repco and most autopart places. This rubbery adhesive goes on the back of the pad and in 95% of cases stop the audible squeal. I use it all the time ofn all 3 of my cars.
b) If this doesn't work you can cut a radial groove (same direction as if you had spokes in the wheel) in the pad with a hacksaw in the middle of the pad. Cut down to within about 1 or 2mm of the backing plate. Some good pads already have a radial groove or cut in the middle of the pad for this reason.
c) Chamfer the leading edge of the pads (the short side) so the angle of incidence with disk is around 45 degrees. Just grind or cut the corner off the leading edges (just about 5 mm usually).
These will not inhibit the performance of your brakes and are standard Porche approved remedies.
The AutoGuide.com network consists of the largest network of enthusiast-owned enthusiast-operated automotive communities.
AutoGuide.com provides the latest car reviews, auto show coverage, new car prices, and automotive news. The AutoGuide network operates more than 100 automotive forums where our users consult peers for shopping information and advice, and share opinions as a community.