Sorry, more E92 brake questions
Discussion
So I did Angelsy, it went really well and mainly I was surprised how well the brakes held up given all the reports. I did however really thrash them with some resulting issues. All standard by the way, during the day they were noisy, meaning loud low tone as I pressed hard, also lots of noise and rough feel from the steering which I later decided was rough track surface and marbles. But no fade, and I did hammer that peddle hard (I know, everyone has a different threshold and I've never tracked a car with great brakes so I'm good at driving around bad brakes). point is the resulting issue, which is a sound I can only describe as a loud groaning sound (low frequency vibration)every time the car stops.
Yesterday I pulled the front wheels off and used brakes cleaning fluid and a buffing pad to clean up the disks, and the sound is much reduced. I'm thinking i need to used 250 grit emery paper and try again?
Is this all normal stuff? Any other advice?
Next question, inside the wheel arches at the front is a panel, on the right front there are some slots, oh, no, they didn't put the holes in the slots (?) and on the left no slots, does it help at all to just remove the panels? I ideally you'd attach some ducting but what is you didn't? Any help?
Next track will be the Nordschliefa, arguably not as hard on brakes,week after next, not much time so have decided to keep the standard pads, I've done all the research and torn between Carbon Lorain or Pagid, but don't think it will happen for this Ring trip.
Oh, one last thing, does anyone know how aftermarket pads, or indeed track days in themselves affect warranty? this car is under full factory warranty...
Thanks
Yesterday I pulled the front wheels off and used brakes cleaning fluid and a buffing pad to clean up the disks, and the sound is much reduced. I'm thinking i need to used 250 grit emery paper and try again?
Is this all normal stuff? Any other advice?
Next question, inside the wheel arches at the front is a panel, on the right front there are some slots, oh, no, they didn't put the holes in the slots (?) and on the left no slots, does it help at all to just remove the panels? I ideally you'd attach some ducting but what is you didn't? Any help?
Next track will be the Nordschliefa, arguably not as hard on brakes,week after next, not much time so have decided to keep the standard pads, I've done all the research and torn between Carbon Lorain or Pagid, but don't think it will happen for this Ring trip.
Oh, one last thing, does anyone know how aftermarket pads, or indeed track days in themselves affect warranty? this car is under full factory warranty...
Thanks
Typical BMW M brakes I'm afraid. Thrash them and you get a long pedal very quickly.
A friend of mine suffered the same issue and rather than fork out over £1000 for discs and pads all around he simply bought some TEXTAR pads from Eurocarparts (BMW use TEXTAR as well - infact, take away the BMW shim and you'll see TEXTAR or Pagid branding) and had his discs cuts on a brake lathe for £20 per corner. They used the latest technology so it was properly balanced and cut to a brand new surface finish. The new pads complimented perfectly and they felt as good as new.
Here is a video on how it works:
http://www.youtube.com/watch?v=ULZcxE-R0VI
Pretty cool technology.
A friend of mine suffered the same issue and rather than fork out over £1000 for discs and pads all around he simply bought some TEXTAR pads from Eurocarparts (BMW use TEXTAR as well - infact, take away the BMW shim and you'll see TEXTAR or Pagid branding) and had his discs cuts on a brake lathe for £20 per corner. They used the latest technology so it was properly balanced and cut to a brand new surface finish. The new pads complimented perfectly and they felt as good as new.
Here is a video on how it works:
http://www.youtube.com/watch?v=ULZcxE-R0VI
Pretty cool technology.
stevesingo said:
Yeah brilliant 
No mention of minimum disc thickness. A band aid solution for cheapskates, Wheelerdealers even.
Typical response. No mention of minimum disc thickness. A band aid solution for cheapskates, Wheelerdealers even.
It's a cheap solution, yes but not a bandaid solution.
Braking skimming is a Porsche approved service. Most Porsche dealers have the device in the workshop. Even my local Sandal BMW have such a device, as do Stratstone Mercedes and the Toyota garages down the road. I guess they are all cheap skates eh?
And obviously if it exceeds the minimum thickness the service is pointless but then, most people do have the faculties to work that out. The thickness is usually laser engraved somewhere on the brake disc and any competent mechanic will point it out.
Edited by Schermerhorn on Monday 23 June 20:23
VTECMatt said:
FYI The Ring is a brake killer.
no its not.There are only a couple of really big braking zones (e.g. SX into Aremburg , Dottinghöhe into Tiergarten - although not during TF, as you're not doing full laps).
If you're leaving DSC on, it does work the brakes much harder, so they may overheat then, but all you really need (brake wise) for consistency quick lapping is a better pad compound.
I ran PFC08s on my E92, and they were a good compromise between road + track.
My CSL had APs, with PFC disks + PFC01 pads, APs provided better pedal feel, but not better outright braking performance over standard BMW brakes (with appropriate pads).
Anyone who tells you otherwise is talking nonsense.
(raison d'être being that standard brakes are already capable of overwhelming available grip to tarmac)
Thanks guys for all the replies, the current std pads are better now that I've cleaned them up, I'm on the Ring next week too, doubt I'll have a chance to change the pads so I'll see how it goes and make a decision after.
Any thoughts on leaving the vent covers off?
BTW, any ideas about how upgrading pads or just doing track days in general effects warranty?
Any thoughts on leaving the vent covers off?
BTW, any ideas about how upgrading pads or just doing track days in general effects warranty?
Schermerhorn said:
Typical response.
It's a cheap solution, yes but not a bandaid solution.
Braking skimming is a Porsche approved service. Most Porsche dealers have the device in the workshop. Even my local Sandal BMW have such a device, as do Stratstone Mercedes and the Toyota garages down the road. I guess they are all cheap skates eh?
And obviously if it exceeds the minimum thickness the service is pointless but then, most people do have the faculties to work that out. The thickness is usually laser engraved somewhere on the brake disc and any competent mechanic will point it out.
Dealers offer such a service as it is cheaper than replacing brake discs under warranty. For the numbers of cars dealers see under warranty with brake vibrations, if 30% of those can be skimmed and remain within the minimum thickness tolerance, that is a significant saving. And of course, when the next service comes around and the discs are close to the minimum, the dealer will advise new discs for which the customer pays.It's a cheap solution, yes but not a bandaid solution.
Braking skimming is a Porsche approved service. Most Porsche dealers have the device in the workshop. Even my local Sandal BMW have such a device, as do Stratstone Mercedes and the Toyota garages down the road. I guess they are all cheap skates eh?
And obviously if it exceeds the minimum thickness the service is pointless but then, most people do have the faculties to work that out. The thickness is usually laser engraved somewhere on the brake disc and any competent mechanic will point it out.
Edited by Schermerhorn on Monday 23 June 20:23
Schermerhorn said:
Typical response.
It's a cheap solution, yes but not a bandaid solution.
Braking skimming is a Porsche approved service. Most Porsche dealers have the device in the workshop. Even my local Sandal BMW have such a device, as do Stratstone Mercedes and the Toyota garages down the road. I guess they are all cheap skates eh?
And obviously if it exceeds the minimum thickness the service is pointless but then, most people do have the faculties to work that out. The thickness is usually laser engraved somewhere on the brake disc and any competent mechanic will point it out.
+1It's a cheap solution, yes but not a bandaid solution.
Braking skimming is a Porsche approved service. Most Porsche dealers have the device in the workshop. Even my local Sandal BMW have such a device, as do Stratstone Mercedes and the Toyota garages down the road. I guess they are all cheap skates eh?
And obviously if it exceeds the minimum thickness the service is pointless but then, most people do have the faculties to work that out. The thickness is usually laser engraved somewhere on the brake disc and any competent mechanic will point it out.
Edited by Schermerhorn on Monday 23 June 20:23
I got my fronts skimmed 5k miles ago. No juddering since....will use again in future if i have another brakes set juddering.
Gassing Station | M Power | Top of Page | What's New | My Stuff