TrackDay, I'll break up stock HC unit and a Jeep SRT8 WK2 unit apart shortly and show you guys the weight difference the individual pieces. The Jeep SRT8 utilizes the same size 380MM rotor ring so the weight for our HC 2 piece units will be the same, if not lighter, than we've advertised.
We have not done any testing on the HC application just
yet. The manufacturer of these rotors, Girodisc, has tested this style rotor on multiple street/race applications however. The rotors are the same style rotor rings used in all of their high performance brake systems; Audi, BMW, Ferrari, Lamborghini, Mercedes, McLaren, Nissan, Porsche, etc.
A couple things to note about these brakes:
We recommend running slotted discs for high performance applications. The rapid heating and cooling cycles will cause cracking on the friction surface of a drilled disc. The use of high friction or racing pads will exaggerate this condition. Most pad manufacturers specifically recommend that their race pads not be used on a drilled disc for this reason.
For maximum airflow and superior cooling, this brake system uses curved vanes. For a curved vane internally vented disc, the geometry of the vanes dictates the direction of rotation. A curved vane disc must be installed with the vanes running back from the inside to outside diameters in the direction of rotation. Your discs will come with labels indicating their correct placement on the vehicle. Orienting the disc in this manner creates a centrifugal pump. The rotation of the disc causes air to be pumped from the center of the disc, through the vanes, and out through the outside diameter of the disc. This greatly enhances the disc’s ability to dissipate heat.
Another cool thing about these rotors is that the slots also act as a rotor wear bar. Once the slot is worn down, your rotor is at the minimum thickness and should be replaced.