Brake dust
Steve.
I will not buy semi metallics anymore, they leave very visible dust, have a tendancy to squeal more and don't stop like the ceramics.
Last edited by KevinM; May 4, 2007 at 08:57 AM.
I will not buy semi metallics anymore, they leave very visible dust, have a tendancy to squeal more and don't stop like the ceramics.
but just so you know, the ceramics aren't as forgiving on the rotors like semi-metallic pads are. they cause the rotors to wear out quicker. you should still get a long life out of the rotors, but it'll be a thousand miles less than normal
"Since they were first used on a few original equipment applications in 1985, friction materials that contain ceramic formulations have become recognized for their desirable blend of traits. These pads use ceramic compounds and copper fibers in place of the semi-metallic pad's steel fibers. This allows the ceramic pads to handle high brake temperatures with less heat fade, provide faster recovery after the stop, and generate less dust and wear on both the pads and rotors. And from a comfort standpoint, ceramic compounds provide much quieter braking because the ceramic compound helps dampen noise by generating a frequency beyond the human hearing range."
"THE CERAMIC AGE
Back in the 1980s most automakers were using semi-metallic pads on their front-wheel drive cars. Semi-metallic friction materials containing chopped steel fibers were, and still are, a popular choice for high-temperature, hard-use braking applications. But, because of their high steel content, semi-metallic compounds tend to be harsh, noisy and hard on rotors. Brake suppliers also developed a variety of nonasbestos organic (NAO) compounds, but NAOs are better suited for low-temperature applications and drum brakes. Something else was needed as an alternative to semi-mets."
Here is the full article
http://www.aa1car.com/library/2003/bf30322.htm
like I said, you won't lose alot of useable life, but the rotors will wear sooner than if normal metallic pads are used...on the flip side, the ceramic pads will last longer than normal pads...
oh well, either way the ceramics work better than OEM...alot and they don't dust your wheels like OEM does either.
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Ceramic: These are composed of ceramic fibers, nonferrous filler materials, bonding agents, and possibly small amounts of metal. Lighter in color and more expensive than other brake pads, ceramic pads are cleaner and quieter, and offer excellent braking characteristics without wearing down the rotors.
Semimetallic: This formula, containing about 30 to 65 percent metal, typically includes chopped steel wool or wire, iron powder, copper or graphite mixed with inorganic fillers, and friction modifiers that bond all the ingredients together. These pads are more durable and have excellent heat transfer, but also wear down rotors faster, have intrusive noise characteristics, and may not perform as well under low-temperature conditions
Here is great article on Ceramics, backs up less rotor wear!
http://www.akebonobrakes.com/company...ramic_tech.pdf
I think someone created a myth!
Last edited by KevinM; May 4, 2007 at 10:56 AM.
Companies like Akebono like to tout how much research they've done to produce a superior ceramic pad. I have no reason to doubt them, but I think it's entirely possible that another me-too company would throw together a "ceramic" compound just to jump on the ceramic band wagon and end up with a rotor eating hunk 'o dung that leads to the "ceramics are bad" opinions.
As for the dust covers, you're going to get a pile of people who say they reduce the cooling of the rotors/pads and cause a different set of problems.
So, what makes the Carquest Blue's so good? Carquest, what chain are they sold at? Not familiar with them here in central NH.
Thanks
Anybody tried the Carbon Metallic ones?
Last edited by bridge; May 5, 2007 at 08:31 AM.








