Brake Rotors/Discs

Brake Rotors/Discs

Front-rotor warpage is not usually from overzealous use, but from miss-/over-torquing of wheel lug nuts (spec is circa 80lb/ft).

If removal of rear wheels proves difficult (frozen to the disc) and the vehicle is 93/94 then watch for heat build up due to a sticking rear calliper. If the wheel is simply sticking to the hub/rotor via normal iron/steel-aluminium corrosion, apply copper anti-seize grease between the two mating surfaces.

Grooved or drilled rotors are unnecessary for the street, modern street brake pads do not require such alterations. In particular drilling brake rotors reduces motor mass (hence a hotter disc) as well as causing a heat gradient between areas around holes and that between the holes. Cross drilled discs must be cast as Porsche discs are, otherwise stress risers & cracks will result causing rotor warpage, pulsating pedal and decreased braking efficiency.

Driving technique & brake-usage

When coming to a stop, aim to stop short by a few feet and then ease up on the brake pedal - so allowing the pads to cool slightly, reducing rotor grooving & limiting rotor warpage.

Glazed Brake Pads

Grooved rotors can prevent glazed brake pads, although usually a change to a better brake pad will resolve the problem.

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