| FLOATING DISCS All metals "grow" when heated. The diameter of cast iron brake discs can increase as much as 2mm (0.080 inch) at elevated braking temperatures. When the disc is radially restrained from growing (as in all one-piece discs) the friction plates are forced into a cone shape as temperature increases, adversely effecting both temperature and pressure distribution within the pads and the feel of the pedal. Racing and high performance street discs are mounted on separate hats or bells, usually of Aluminum. The fastening system is designed to allow radial growth and minimal axial float resulting in a mechanically stable system. Hats or bells should be made from 7075 or 2024 heat-treated aluminum billets that are pre-stressed and relieved, not from 6061 or from plate stock.
Luke Pavlick
'90 Z32 Stage IV Twin Turbo
Items in the mirror appear ... TO BE LOSING
I want to die peacefully in my sleep ... just like Gramps
not screaming and terrified like the
people in his car at the time |
