| Re: Pads, Rotors et all |
Subject: Re: Pads, Rotors et all by bogus on 2009/3/29 20:31:14 Quote:
What is interesting is that top level race cars DO use drilled rotors. However, theirs are carbon fibre and cost $5k a set. The theory behind drilled rotors is to exhaust the gases generated by heat when stopping. The problem is, 95% of street cars brakes never get hot enough to off gas, and since modern street pads don't use glues to bind the pad material together, the gases don't generate as much anyway. It's all marketing hocus-pocus. Modern pads are made of various powders, pressed together at some 5000 PSI or something silly like that. Now, when you are getting consistant 1800F rotor temps, then you need something... and F1 brakes do just that, deal with 1800F rotor temps. The holes, for them, do a number of things - vent the gases, cheese grate the pad surface to keep it from glazing and allow a place for more air to flow to help cool the rotor surface. Then again, the composition of the F1 brake pads is top secret anyway... NASCAR teams are moving away from drilled. I noticed today that the Alcon system being used by JGR racing is simply slotted. I would imagine that gives much of the same result without the weakness concerns. In general, the composition of racing pads is significantly different. I have no idea what is what when it comes to manufacture... |
