Re: Slotted vs. Drilled
the original post is pretty accurate but for a few things. the bite is said to drop when you have drilled rotors. true because the holes create air pockets that create a buffer beween the pad and rotor...more efficient with slots since the slots extend along the surface of the rotor farther than the pads can reach, thus allowing gases to escape, but...and this is the kicker, with less surface contact between rotor and pad due to holes/slots, a greater bite is achieved. example. adidas on ice=bad idea. skates on ice=good idea. less surface contact means a much higher lb/in2 ratio. with pads and rotors though, this happens on a molecular level (hence the type of friction that is created). the original post is accurate for your more typical pads designed for solid rotors (but better with slots), but higher performance pads have less off gassing and make them more appropriate for drilled rotors. to add one more thing to the original post...temp of pads/rotors is proportional to off gassing. the hotter they get, the more release. im a materials engineer for vt technologies and work specifically with the compounds used in most brake pads (but using them for accoustic reasons instead).
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