Brake screech
#16
Three Wheelin'
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Some good information can be found here http://www.stoptech.com/technical-su...l-white-papers on bed-in and other braking topics. Personally I'd not go down to 0mph on the brakes when bedding in, or hot brakes, unless there was a necessity.
http://stoptech.com/technical-suppor...-system-bed-in
Overtime, I've gone with the KISS process, and sure, you don't have to go to 0 but, it shouldn't make much difference whether you do or you don't. I suppose in theory, there is no abrupt stop if you don't go down to 0 and that might make a bit of difference on how the pads wear on the brakes but, in practice, it hasn't made any difference for me. But, I'm not going to argue with the experts.
Dan (has Stoptech 13" on his 350z)
#19
Rennlist Member
#20
Nordschleife Master
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The part I don't understand is why do the brakes squeal in the first place? I've owned 2 other Pcars and neither one ever squealed and I never bed them. I've owned many cars and trucks over my 40 plus years of driving and never once had to bed the brakes and never had brakes that squealed. Can some one explain why sport cars in general can squeal and your every day low end car doesn't?
#21
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The part I don't understand is why do the brakes squeal in the first place? I've owned 2 other Pcars and neither one ever squealed and I never bed them. I've owned many cars and trucks over my 40 plus years of driving and never once had to bed the brakes and never had brakes that squealed. Can some one explain why sport cars in general can squeal and your every day low end car doesn't?
#22
Rennlist Member
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The part I don't understand is why do the brakes squeal in the first place? I've owned 2 other Pcars and neither one ever squealed and I never bed them. I've owned many cars and trucks over my 40 plus years of driving and never once had to bed the brakes and never had brakes that squealed. Can some one explain why sport cars in general can squeal and your every day low end car doesn't?
Can't give a technical explanation but am sure that the pad material is a factor. Most track pads I've heard squeal. The pagids I've used are noisy. Also on 987s and 986s (not sure about other models) there are puck/shim things- called dampers that fit into the caliper pistons to reduce noise. When I went to track pads I left these out and that contributes to the noise. I don't know for sure if the GT3 uses similar (haven't had the pads out yet), but I don't think so. Looking at brake parts on Suncoast I don't see them. Of course the caliper design is different too. Bottom line I think Porsche prioritized brake performance over noise/comfort considerations.
Bedding the brakes as discussed already helps too in that a proper bedding will tend to create a more uniform surface between the brake pad friction surface and the brake disk. This uniform surface helps to reduce the vibration and thus squeal. Unfortunately this is a temporary solution only. As the brakes are deployed over time, and especially in an aggressive or repetitive sequence (e.g. spirited or track driving) the surface between brake pad and brake disk changes from the smooth surface when freshly bedded to one with more variations (this applies to both surfaces -- pads and disks). The result is an increase in vibration and hence the potential for the brakes to squeal.
I have found using a combination of very good high temperature ceramic anti-squeal paste (ceramic won't cause a degradation in the rubber caliper boots and seals) and anti-vibration shims help. I always get squeal on the track, but I have significantly reduced the squeal around town. The occasional re-bedding helps too.
#24
Three Wheelin'
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I washed my car today and the squeal came back. Maybe brake dust might have something to do with it. I think these brakes will continue to squeal for a long time.
#26
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I just ignore it. Or laugh.
#27
Race Car
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I love my brakes when squealing
as you said happens when (too..) light pressure on brakes (and brakes are still cold...)
to avoid screeching just push higher or more convinced a bit on brakes
as you said happens when (too..) light pressure on brakes (and brakes are still cold...)
to avoid screeching just push higher or more convinced a bit on brakes
#29
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Glad this was posted today. The screech from my brakes the past few days has been insane. Have 1,400 miles on her. Will try to bed her within the next few days. I don't mind some screeching, but the noise lately has been a little over the top.
#30
Rennlist Member
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Permatex 24125 Ceramic Extreme Brake Parts Lubricant, 8 oz.