Actually, that is not correct. The caliper has very little to do with how much energy is dissipated by the brake system. Caliper manufactures go to great lengths to limit the amount of heat transferred to the caliper, for the sake of the brake fluid. I know-doing the brake calculations for the Formula SAE car. The rotor weight has everything to do with how much energy that the brake system can handle.
Also, 100-50 mph braking is *very* tough on the brakes. Do the math. Kinetic energy increases by the square of the velocity. A 100-50 mph braking only has 133% more energy than 100-0 mph braking. -- Akira Sasaki '90 Jetta GLi <- white, with small bumpers > From: Matthew Yip <[email protected]> > Date: Thu, 10 Feb 2000 07:54:40 -0800 (PST) > To: [email protected] > Subject: RE: brakes > > I don't recall that article in EC but I do recall one where EC tested > brake pads. The "test" has a great deal to do with measuring fade > resistance. Most likely, the scenario that EC tested was a car that > was driven to 100 mph and braked to 0 mph ad nauseum until the brakes > faded into oblivion. This is a measure of fade but far from a real > world test. In the real world, it is more likely that you'll brake > hard for a turn-in point, hammer the throttles (all the while letting > the brakes cool) and brake hard again for the next turn-in. Slowing > to 0 mph takes quite a bit more effort (and generates tons of add'l > thermal load) than it does to brake from 100 to 50 in anticipation of > a turn-in. > > Assuming that identical pad materials and fluid is used, the Bimbos, > er Brembos or Wildwoods calipers will most likely dissipate heat more > quickly and efficiently due to the finned aluminum casting. That > aside, if a larger diameter rotor is used, the swept area increases, > thus providing a larger braking surface which both decreases the > effort req'd to slow the vehicle AND, due to lower effort, keeps > rotor temps (and pad/caliper) temps lower. > > Enough brake talk for me - I'm limited to those marvelous 9.4" rotors > that were somewhat acceptable on the Rabbit GTi. > > --- "Williams, Chris (RSCH)" <[email protected]> wrote: >> John wrote: >> >> The differences will be felt on the track where repeated stops >> from >> 100mph or near that are done all the time. >> >> It's my fault to not have mentioned that the same EC test did a >> bunch of >> stops from high speeds to test resistance to fade. They found that >> there >> was virtually no difference in fade resistance between upgraded OEM >> and the >> Wilwoods. > > > ===== > Matthew Yip > [email protected] > http://www.geocities.com/mgyip/ > > '87 GTi 16v - x2 > '88 M5 > '99 F350 > __________________________________________________ > Do You Yahoo!? > Talk to your friends online with Yahoo! Messenger. > http://im.yahoo.com > _____________ > List Sponsor: http://www.netsville.com > To remove yourself from this list, send mail to [email protected] with > 'unsubscribe a2_16v' in the body of your message > See us on the web at http://www.a2-16v.com > Visit the 16V Homepage at http://www.gti16v.org _____________ List Sponsor: http://www.netsville.com To remove yourself from this list, send mail to [email protected] with 'unsubscribe a2_16v' in the body of your message See us on the web at http://www.a2-16v.com Visit the 16V Homepage at http://www.gti16v.org
