How many times have you heard that load of BS online, or at a meet? Apparantly that internet wisdom hasn’t made it to the engineers at Porsche. Here are the brakes they use on their 911 GT3 Cup Car
This is the interior and exterior of it, for those that haven’t seen it, or doubt that it’s “really a race car”
Now, this is not to suggest that all cross drilled rotors are great for the track. Nor is it to suggest that anything else is inferior, or superior. The fact of the matter is 2 main things determine what the right setup is. The quality of the rotor, and the pad being mated to it. I don’t know what foundry Porsche sources their iron from for these disks, nor do I know what pads they use. Will try to do some research, unless on of our readers knows? But I’d bet dollars to donuts that the combo was researched heavily before being decided upon. This is not a car built around a strict budget, so their ability to choose is fairly free. The more aggressive your pad, the better the iron needs to be in your rotor (assuming you’re running iron disks). Choose wisely!