| I won't say this is the end all be all of brake tech but this is what I understand: Cross-drilled was developed to aid in "outgassing" of pads. Pad technology has come far enough that they have eliminated the outgassing problem. On Porsche's website, the only benefit they give for having cross-drilled rotors is better wet braking performance. Plus, porsche rotors have cast holes to keep them from cracking. Braking works by converting forward motion into heat. The rotors act as heatsinks, meaning they absorb the heat energy, then dissipate the heat. The more mass in the rotors the more energy they can absorb and expel as heat through the central vent. So if you drill holes in the rotor, you reduce the mass and less energy can be transfered. This is why upgrading to larger diameter rotors is the optimum choice. More swept area is more mass and the results are better stopping distances. Anyone is more than welcome to tell me where I'm wrong. I'm a big boy, I can take it :)
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Jonathan Howlett
AIM-JRHZ32
1993 Ultra Red Twin Turbo
1990 Pearl Yellow Twin Turbo(Deceased) |
