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Old Jul 17, 2006 | 03:46 PM
  #1  
KZEVO's Avatar
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Brake Shims

check this out. RB just came out with these

http://www.racingbrake.com/EVO_8_STi...r_p/bs1001.htm
Old Jul 19, 2006 | 12:17 AM
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hahaha i've been seeding the link in various discussions that have been long running about brake squeel.
Old Jul 19, 2006 | 01:57 AM
  #3  
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jus re-use your factory shims wen u swap pads
work perfectly fine an i dont see y one wud spend for new shims
Old Jul 19, 2006 | 03:07 AM
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think about it like your brake pad is like a violin string, your rotor is like the bow. you're drawing the bow across the string and if there is room to shake then it'll make noise.

if you have air in your lines the squeek will be worse as there's a little more room or give for high amplitude oscillation which is what causes the noise.

what the installation grease does is tries to damp this vibrating out and also to minimize the spaces inbetween surfaces for vibrations to happen.

brake dust makes this issue worse because now you've built up a lot of tiny violin strings and that just means there's more ways to squeek.

why race pads squeel regardless is because they're harder, things that are harder vibrate at a higher frequency and at that point you might not be able to damp them out with the materials and space you have to work with.

the whole idea is to introduce some vibration damping material inbetween the shim/pistons and the pad. this is like softening the string of a violin. muting a horn, muting a piano.

the engineering problem? brakes get hot you need something that good at conforming to the shape but then won't get soft at say.... 700+ degrees F. (it might be ok brittle, but not soft cuz then it melts and drips away).

so tada... introducing all these high temp greases that harden over heat and time. they keep the brakes quieter.

NOW introduce racing brake's damper shim system. the damper is already built onto the shim so you just put some grease in drop the whole assembly in and it should be miraculous.

Last edited by trinydex; Jul 19, 2006 at 03:09 AM.
Old Jul 19, 2006 | 05:12 AM
  #5  
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Originally Posted by trinydex


think about it like your brake pad is like a violin string, your rotor is like the bow. you're drawing the bow across the string and if there is room to shake then it'll make noise.

if you have air in your lines the squeek will be worse as there's a little more room or give for high amplitude oscillation which is what causes the noise.

what the installation grease does is tries to damp this vibrating out and also to minimize the spaces inbetween surfaces for vibrations to happen.

brake dust makes this issue worse because now you've built up a lot of tiny violin strings and that just means there's more ways to squeek.

why race pads squeel regardless is because they're harder, things that are harder vibrate at a higher frequency and at that point you might not be able to damp them out with the materials and space you have to work with.

the whole idea is to introduce some vibration damping material inbetween the shim/pistons and the pad. this is like softening the string of a violin. muting a horn, muting a piano.

the engineering problem? brakes get hot you need something that good at conforming to the shape but then won't get soft at say.... 700+ degrees F. (it might be ok brittle, but not soft cuz then it melts and drips away).

so tada... introducing all these high temp greases that harden over heat and time. they keep the brakes quieter.

NOW introduce racing brake's damper shim system. the damper is already built onto the shim so you just put some grease in drop the whole assembly in and it should be miraculous.
Would these work any better than the stock ones?
Why?
Old Jul 19, 2006 | 12:15 PM
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Because the RB shims use a rubber compound to absorb the vibrations. The stock ones do almost nothing to prevent vibrations (and squeal).

There are other reasons you can read about on the RB website.
Old Jul 19, 2006 | 03:58 PM
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good gracious... did you read any of what i wrote?




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