 Porterfield R4S Brake Squeal |
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| bluhun |
  Dec 23 2009, 08:11 PM
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#1
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Member  Group: Members Posts: 91 Joined: 23-January 06 From: San Rafael, CA Member No.: 5,464 Region Association: Northern California  |
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I'm running the Porterfield R4S street pads front and rear (Boxster calipers and rotors up front, with widened 914 rear calipers and 20 mm vented and cross-drilled rotors), and they squeal like a Banshee! I'm running the anti-squeal shims and we've tried the Wurth anti-squeal treatment, but to no avail. Is there any tried and true cure for this malady or is this just par for the course with carbon-kevlar pads? |
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| ArtechnikA |
Dec 24 2009, 08:16 AM
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#2
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rich herzog Group: Members Posts: 7,390 Joined: 4-April 03 From: Salted Roads, PA Member No.: 513 Region Association: None |
QUOTE(bluhun @ Dec 23 2009, 09:11 PM)  ...squeal like a Banshee! I'm running the anti-squeal shims and we've tried the Wurth anti-squeal treatment, but to no avail. Is there any tried and true cure for this malady or is this just par for the course with carbon-kevlar pads? I wouldn't mind a bit of squeal if I had some because if I'm braking, it's usually because someone clueless and oblivious isn't paying attention... The tried-and-true cure is: brake deeper! I'm running R4S on the Titan with cryo-treated (but stock-sized) slotted frozen Rotors. No noises... The Titan is sometimes viewed as having marginal braking for its weight and power, and this combination definitely improves that. It _is_ possible to have too much brake, just as it's possible to have too much tire, if you can't get them into their operating ranges. And you might be experiencing a bit of glazing as well, especially if they weren't broken in per the recommendations... There's 2 schools of thought on anti-squeal goo, and since I've never used the Würth I don't know which it is. But you either try to stick the pad to the piston so it can't vibrate, or you lubricate the back so that when it does vibrate, there is no friction to make noise. I've had best luck with the "lubricate" method so that's what I use. I use a LIGHT smear of LubroMoly copper-based LM508 anti-sieze on the back of each pad. If the Würth product is a 'stick-it' product, try the lubrication approach. If it's a lubrication product, try one of the 'stick-it' methods. Brake harder and let 'em get hot... |
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Posts in this topic
bluhun Porterfield R4S Brake Squeal Dec 23 2009, 08:11 PM
Racer Chris I think its common with carbon/kevlar pads. Its ha... Dec 23 2009, 08:21 PM detoxcowboy
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I'm running the Porterf... Dec 23 2009, 11:13 PM ConeDodger I have the R4S pads at all four corners of both th... Dec 24 2009, 09:00 AM tat2dphreak
:agree:
my R4S pads never squeaked, when they we... Dec 24 2009, 09:27 AM r_towle From my understanding, brake squeal is not from th... Dec 24 2009, 12:43 PM
iamchappy I had some squeal on mine when using solid rotors ... Dec 24 2009, 01:22 PM |
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