Strange noise when braking from higher speeds
23 September 2008, 10:40 AM
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Strange noise when braking from higher speeds
Ok all, std MY99 4 pot brake set up, but with Pagid Black pads.
If I brake steadily/reasonably firmly down from 70mph, the brakes make a rather strange noise, not immediately, but after they have been applied for a second or two of firm braking; it's hard to describe, it's not knocking or grinding or anything like that. It's more like a loud intermittent hum, which speeds up as the speed decreases. Sounds kinda futuristic lol! I'm wondering if perhaps my discs are past their best and are grumbling as the heat builds up?
Anyone have any suggestions?
Ns04
If I brake steadily/reasonably firmly down from 70mph, the brakes make a rather strange noise, not immediately, but after they have been applied for a second or two of firm braking; it's hard to describe, it's not knocking or grinding or anything like that. It's more like a loud intermittent hum, which speeds up as the speed decreases. Sounds kinda futuristic lol! I'm wondering if perhaps my discs are past their best and are grumbling as the heat builds up?
Anyone have any suggestions?
Ns04
23 September 2008, 03:30 PM
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Lol, you're running out of brakes..! 
I had exactly the same thing on my 05wrx using padgid black pads, feels like the disc is warped. It also used to happen with the oem pads. When new the pagids seemed not to suffer from this "vooomvoooomvooooom" noise you've described, but it didn't take too many miles for it to return..
The thing that I noticed was that it was highish speed moderate braking that it seemed to be at it's worst. If you stamped on them it wasn't quite so bad. My conclusion was it was down to the length of time spent on the pedal, ie steady braking is actually creating more heat build up, IYSWIM..?
On my lardy 05 it did seem to eventually effect the retardation. Perfect excuse to fit some AP's, which if I'd realised just how much better the braking performance would be, I'd have fitted 12months earlier (problems with the 4pots or not..!).
Have you noticed any 'patches' on the surface of the disc (pad transfer)..?
I had exactly the same thing on my 05wrx using padgid black pads, feels like the disc is warped. It also used to happen with the oem pads. When new the pagids seemed not to suffer from this "vooomvoooomvooooom" noise you've described, but it didn't take too many miles for it to return..
The thing that I noticed was that it was highish speed moderate braking that it seemed to be at it's worst. If you stamped on them it wasn't quite so bad. My conclusion was it was down to the length of time spent on the pedal, ie steady braking is actually creating more heat build up, IYSWIM..?
On my lardy 05 it did seem to eventually effect the retardation. Perfect excuse to fit some AP's, which if I'd realised just how much better the braking performance would be, I'd have fitted 12months earlier (problems with the 4pots or not..!).
Have you noticed any 'patches' on the surface of the disc (pad transfer)..?
23 September 2008, 05:09 PM
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Lol, you're running out of brakes..!
I had exactly the same thing on my 05wrx using padgid black pads, feels like the disc is warped. It also used to happen with the oem pads. When new the pagids seemed not to suffer from this "vooomvoooomvooooom" noise you've described, but it didn't take too many miles for it to return..
The thing that I noticed was that it was highish speed moderate braking that it seemed to be at it's worst. If you stamped on them it wasn't quite so bad. My conclusion was it was down to the length of time spent on the pedal, ie steady braking is actually creating more heat build up, IYSWIM..?
On my lardy 05 it did seem to eventually effect the retardation. Perfect excuse to fit some AP's, which if I'd realised just how much better the braking performance would be, I'd have fitted 12months earlier (problems with the 4pots or not..!).
Have you noticed any 'patches' on the surface of the disc (pad transfer)..?
I had exactly the same thing on my 05wrx using padgid black pads, feels like the disc is warped. It also used to happen with the oem pads. When new the pagids seemed not to suffer from this "vooomvoooomvooooom" noise you've described, but it didn't take too many miles for it to return..
The thing that I noticed was that it was highish speed moderate braking that it seemed to be at it's worst. If you stamped on them it wasn't quite so bad. My conclusion was it was down to the length of time spent on the pedal, ie steady braking is actually creating more heat build up, IYSWIM..?
On my lardy 05 it did seem to eventually effect the retardation. Perfect excuse to fit some AP's, which if I'd realised just how much better the braking performance would be, I'd have fitted 12months earlier (problems with the 4pots or not..!).
Have you noticed any 'patches' on the surface of the disc (pad transfer)..?
Sounds like you've nailed it mate. So basically, I need better brakes?
Hmmm, maybe it's time to go for the K-sport 6 pot 304mm kit? They in a GB at the moment.... Argh, must stop spending money on this damn car!!!
Ns04
24 September 2008, 10:03 AM
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You dont defo need better brakes. Mine do this alot when hot, even when the pads are new (pagid RS29s).
In fact, all brakes will do it if you get them hot enough. My 911 would do it after a while on track, and that had monster brakes. The noise will get more and more the lower the pads gets though.
At the end of the day, if the brakes are stopping you without fade etc, I wouldnt worry.
In fact, all brakes will do it if you get them hot enough. My 911 would do it after a while on track, and that had monster brakes. The noise will get more and more the lower the pads gets though.
At the end of the day, if the brakes are stopping you without fade etc, I wouldnt worry.
24 September 2008, 11:04 AM
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You dont defo need better brakes. Mine do this alot when hot, even when the pads are new (pagid RS29s).
In fact, all brakes will do it if you get them hot enough. My 911 would do it after a while on track, and that had monster brakes. The noise will get more and more the lower the pads gets though.
At the end of the day, if the brakes are stopping you without fade etc, I wouldnt worry.
In fact, all brakes will do it if you get them hot enough. My 911 would do it after a while on track, and that had monster brakes. The noise will get more and more the lower the pads gets though.
At the end of the day, if the brakes are stopping you without fade etc, I wouldnt worry.
It's just that they do it quite readily! It's not like I have to try to get them to produce the noise: for example, coming off a slip road to a roundabout/traffic lights. Apply brakes two seconds later....... I am still on the original discs, maybe its time I changed them. The pads still appear to have plenty of life in them.
Ns04
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24 September 2008, 03:16 PM
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Could be disc's I suppose, but even with new disc's they won't perform anything like a decent big brake kit.
I can honestly say that when I fitted my AP's (only 330 4pots btw) it transformed the car, so much it was like having another 50bhp..
Best money spent on my scoob, and I've spent a bit..
Out of interest, how much are a new set of OEM disc's..?
I can honestly say that when I fitted my AP's (only 330 4pots btw) it transformed the car, so much it was like having another 50bhp..
Best money spent on my scoob, and I've spent a bit..
Out of interest, how much are a new set of OEM disc's..?
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