Quote:
|
Originally Posted by The Cleaner
This is true, OEM pads have a very specific rockwell hardness to wear WITH the rotor. Most dustless pads are much harder and not carbon based and tear rotors faster. They don’t transfer heat to the caliper and fluid like OEM pads and have a higher rotor temps during braking.
There is really nothing positive about dustless pads when comparing to OEM spec TUV approved pads other than less dust.
|
Agree completely with the hardness comments. I don't understand the heat comments however. Carbon is an insulator, and would not promote heat transfer. Apart from that, however, why would it be a good idea to transfer heat to the caliper and then the fluid? That is what causes boiling of the brake fluid, and thus loss of braking when the brake pedal sinks to the floor. The pads need to insulate, it is part of the design function.
The amount of heat that goes into the rotor is directly related to the energy absorbed by the brake. The brake can only get hotter if it is absorbing more kinetic energy, the same energy absorbtion rate will produce the same heat in the rotor. So, if the rotor is in fact hotter with aftermarket pads it is because the vehicle is stopping more quickly.
All that aside, I do agree that the OEM pads are a good all around balance, with the sole exception of the dust factor.
__________________
2007 X3 3.0si, 6 MT, Premium, White
Retired:
2008 535i, 6 MT, M Sport, Premium, Space Grey
2003 X5 3.0 Steptronic, Premium, Titanium Silver
2002 325xi 5 MT, Steel Grey
2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue
|