porterfield r4s brake squeal
12-12-2017, 12:18 PM
#1
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porterfield r4s brake squeal
about 1200 miles ago I replaced my OEM brake pads on my '13 C63 P31 with porterfield r4s to get rid of brake dust and reduce brake squeal.
to my surprise, it has begun to squeal and has gotten significantly worse as mileage increases.
i have bedded-in my new brake pads and my c63 only has 17k miles so the rotors are fine.
on my old PFL c63 a few years back i had porterfield r4s and dont recall it ever squealing this loud.
just wondering if anyone else is experience the same issue with porterfield R4s on C63?
thanks
to my surprise, it has begun to squeal and has gotten significantly worse as mileage increases.
i have bedded-in my new brake pads and my c63 only has 17k miles so the rotors are fine.
on my old PFL c63 a few years back i had porterfield r4s and dont recall it ever squealing this loud.
just wondering if anyone else is experience the same issue with porterfield R4s on C63?
thanks
Last edited by intence; 12-12-2017 at 12:21 PM.
12-12-2017, 12:33 PM
#2
The last time I used R4S they squealed. They're meant to be used for autocross, so when you're just daily driving they glaze over and make noise. That's been my experience.
I use Centric pads. They're cheap, dustless, and quiet for the street.
I use Centric pads. They're cheap, dustless, and quiet for the street.
12-12-2017, 04:17 PM
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Porterfield R4S and similary Hawk HPS are garbage. They don't stop well at all even when at temp. The only upside is they last practically forever. They both are noisy.
12-15-2017, 01:25 AM
#5
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hi i have those porterfield padsfront & rear on a c55 & c63 no noise,just make sure they use pleanty of the rubbery gunk on back of pads
great pads & low dust & no noise
great pads & low dust & no noise
12-15-2017, 09:28 AM
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For My Mercedes has a 6 step solution to quiet brakes. They also sell Porterfield brake pads. Contact Jerry for more information.
http://www.formymercedes.com/6_Steps...iet_Brakes.asp
http://www.formymercedes.com/6_Steps...iet_Brakes.asp
12-15-2017, 10:33 AM
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you are the first person i have seen on this forum to not like the hawk or porterfield pads. do you have a reason why you dont like 2 of the top pads on the market?
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12-15-2017, 03:01 PM
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because the formulation they use are probably from the 70's or 80's.
Ferodo DS2500, Endless MX72, or Project Mu HC+ for street/track pads. My Audi has Ferodo's and they're the best street pads I've ever used. Quiet, rotor friendly, and stops like a race pad at any temperature. Even in the snow. Does not easily overheat for a "street pad" as well. The compatible Endless and Project Mu pads are supposedly just as good. I have a new set of Ferodo DS2500's for my E63 front's that I haven't put on yet. Matching rear's aren't available so I might end up going with Endless pads to match the fronts. My concern is if the Endless pads are noisy since the matching Project Mu pads are in fact noisy. I picked up a set Project Mu HC+800 for my brothers Subaru BRZ and they squeal. They also aren't rotor friendly, so I'd honestly group them with track pads as they do stop as well as track pads too. Currently running Racing Brake XT910's and they're similar to the OEM compound with subtle differences. I have a review of them on the W211 forum. Affordable pads, but I probably won't buy them again.
for race pads you have A LOT more to chose from. none are rotor friendly though, but oh man the selection is real nice.
all you HPS, HP+, R4S, etc guys are just hype seekers. those pads are junk. remember when Axxis/PBR Metal Masters were revered as the best pads available? oh ya, they were just as good at Autozone "LIFETIME" pads. anybody who recommends those to someone literally wants that person to die in any braking situation.
Here is my review of the Racing Brake XT910
https://mbworld.org/forums/w211-amg/...ml#post7023108
Ferodo DS2500, Endless MX72, or Project Mu HC+ for street/track pads. My Audi has Ferodo's and they're the best street pads I've ever used. Quiet, rotor friendly, and stops like a race pad at any temperature. Even in the snow. Does not easily overheat for a "street pad" as well. The compatible Endless and Project Mu pads are supposedly just as good. I have a new set of Ferodo DS2500's for my E63 front's that I haven't put on yet. Matching rear's aren't available so I might end up going with Endless pads to match the fronts. My concern is if the Endless pads are noisy since the matching Project Mu pads are in fact noisy. I picked up a set Project Mu HC+800 for my brothers Subaru BRZ and they squeal. They also aren't rotor friendly, so I'd honestly group them with track pads as they do stop as well as track pads too. Currently running Racing Brake XT910's and they're similar to the OEM compound with subtle differences. I have a review of them on the W211 forum. Affordable pads, but I probably won't buy them again.
for race pads you have A LOT more to chose from. none are rotor friendly though, but oh man the selection is real nice.
all you HPS, HP+, R4S, etc guys are just hype seekers. those pads are junk. remember when Axxis/PBR Metal Masters were revered as the best pads available? oh ya, they were just as good at Autozone "LIFETIME" pads. anybody who recommends those to someone literally wants that person to die in any braking situation.
Here is my review of the Racing Brake XT910
https://mbworld.org/forums/w211-amg/...ml#post7023108
I can share my 2cents in regards to the XT910 in street driving on my E63 and factory rotors.
Street Driving:
Initial bite is Good/OK. Factory pads have 3x more initial bite and deceleration rate until pad life is <70%. After the 70% mark bite and deceleration is on par. I do have to note the XT910 pads have a very very linear feel. It's been 3,000 miles and the pads still feel exactly the same as day one. I'd safely assume they'll feel the same up until they're in need of replacement. Factory pad performance demished as time went by. Up until they were in need of replacement. By that time they did not feel confidence inspiring. This was about 40-30% life when the factory pads just didn't feel confidence inspiring. They weren't bad but weren't good. Having a linear performing pad is key to proper driving. You want your pad to perform exactly as you expect it when you expect them on the street or the track.
I have yet to perform any elevated or panic braking with the XT910, but as they feel very linear in regards to pedal pressure it is not something I would worry about for daily driving. I do have to mention that my opinions on the pads beyond street would be a no...they feel like a great sport pad, but not a pad I'd use on the track. That is just the feeling I get. I could be wrong though as I haven't tested them to that extent just yet.
In regards to dust and noise...they aren't noisy one bit, but do dust the same as the factory pads intially. Over time though the pad dust didn't keep building exponentially on wheels though like factory pads do. Factory brake pad dust seems to attract more factory brake pad dust like a magnet. The XT910's dusted the wheels within the first 10 minutes of stop and go driving, but after that slowly built up. Also, they made noise once or twice but that was about it.
As time goes on I may update this review if anything changes.
Street Driving:
Initial bite is Good/OK. Factory pads have 3x more initial bite and deceleration rate until pad life is <70%. After the 70% mark bite and deceleration is on par. I do have to note the XT910 pads have a very very linear feel. It's been 3,000 miles and the pads still feel exactly the same as day one. I'd safely assume they'll feel the same up until they're in need of replacement. Factory pad performance demished as time went by. Up until they were in need of replacement. By that time they did not feel confidence inspiring. This was about 40-30% life when the factory pads just didn't feel confidence inspiring. They weren't bad but weren't good. Having a linear performing pad is key to proper driving. You want your pad to perform exactly as you expect it when you expect them on the street or the track.
I have yet to perform any elevated or panic braking with the XT910, but as they feel very linear in regards to pedal pressure it is not something I would worry about for daily driving. I do have to mention that my opinions on the pads beyond street would be a no...they feel like a great sport pad, but not a pad I'd use on the track. That is just the feeling I get. I could be wrong though as I haven't tested them to that extent just yet.
In regards to dust and noise...they aren't noisy one bit, but do dust the same as the factory pads intially. Over time though the pad dust didn't keep building exponentially on wheels though like factory pads do. Factory brake pad dust seems to attract more factory brake pad dust like a magnet. The XT910's dusted the wheels within the first 10 minutes of stop and go driving, but after that slowly built up. Also, they made noise once or twice but that was about it.
As time goes on I may update this review if anything changes.
Last edited by hachiroku; 12-15-2017 at 03:30 PM.
12-19-2017, 02:20 PM
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because the formulation they use are probably from the 70's or 80's.
all you HPS, HP+, R4S, etc guys are just hype seekers. those pads are junk. remember when Axxis/PBR Metal Masters were revered as the best pads available? oh ya, they were just as good at Autozone "LIFETIME" pads.
all you HPS, HP+, R4S, etc guys are just hype seekers. those pads are junk. remember when Axxis/PBR Metal Masters were revered as the best pads available? oh ya, they were just as good at Autozone "LIFETIME" pads.
12-19-2017, 02:38 PM
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i've used them too...across multiple platforms...there are better pads out there. some of the best pads have ZERO marketing so you may not even know they're out there.
beats by dre spents over 80% of their budget on marketing. they're obviously the best headphones on the planet! NOT
Porterfield and Hawks race pads are a whole different subject. They are actually solid pads.
beats by dre spents over 80% of their budget on marketing. they're obviously the best headphones on the planet! NOT
Porterfield and Hawks race pads are a whole different subject. They are actually solid pads.
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gp500e (08-04-2019)
12-19-2017, 08:54 PM
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C63 amg Custom 67 Camaro GLK 350 4matic 2017 AMG GTS
i've used them too...across multiple platforms...there are better pads out there. some of the best pads have ZERO marketing so you may not even know they're out there.
beats by dre spents over 80% of their budget on marketing. they're obviously the best headphones on the planet! NOT
Porterfield and Hawks race pads are a whole different subject. They are actually solid pads.
beats by dre spents over 80% of their budget on marketing. they're obviously the best headphones on the planet! NOT
Porterfield and Hawks race pads are a whole different subject. They are actually solid pads.
12-19-2017, 09:58 PM
#13
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i cleaned my wheels and subsequently my brakes too and the squeal reduced by a lot but still there a little bit. will try to bed in brakes again and see if it helps
12-20-2017, 12:35 AM
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porterfields are good pads depending on use. I think for a street pad they are fine. For canyons, aggressive driving, and definitely for track use, they are not well suited at all. Even during some freeway pulls where you brake after, I can get the pads to start smearing a little bit. I can't imagine they would hold up well to track use. street use, mine are quiet and have significantly less dust than the stock pads. I think my next pads will be Endless MX72s
12-20-2017, 02:40 AM
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It depends on which pads you use. Their street pad is not going to be great for the track, but their dual compond R4-1 pad is great. Its made for racing but it's a surprisingly great street pad. My personal favorite is the Hawk pads.
Last edited by Mazspeed; 12-20-2017 at 02:46 AM.
12-20-2017, 12:53 PM
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porterfields are good pads depending on use. I think for a street pad they are fine. For canyons, aggressive driving, and definitely for track use, they are not well suited at all. Even during some freeway pulls where you brake after, I can get the pads to start smearing a little bit. I can't imagine they would hold up well to track use. street use, mine are quiet and have significantly less dust than the stock pads. I think my next pads will be Endless MX72s
Last edited by hachiroku; 12-21-2017 at 11:45 AM.
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RacingBrake (12-21-2017)
12-20-2017, 07:47 PM
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i've used them too...across multiple platforms...there are better pads out there. some of the best pads have ZERO marketing so you may not even know they're out there.
beats by dre spents over 80% of their budget on marketing. they're obviously the best headphones on the planet! NOT
Porterfield and Hawks race pads are a whole different subject. They are actually solid pads.
beats by dre spents over 80% of their budget on marketing. they're obviously the best headphones on the planet! NOT
Porterfield and Hawks race pads are a whole different subject. They are actually solid pads.
I've had great results from Hawk race pads along with Ferodo, Cobalt and Carbotech. Street pad experiences have varied.
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hachiroku (12-21-2017)
