RS4 62-0 braking time?

[FrankC]

What time does it take the RS4 with standard brakes to go from 62mph to rest?

Mate let me have his M3 for the day and the brakes are awesome!
Figures for the M3 are 62mph to rest in 2.6 seconds.

The M3 is 70kg lighter than the RS4,but the difference in stopping power is
much more noticable in the M3!

I have driven a couple of other RS4,s and the brakes all seemed to have the same amount of performance.

Cheers fc

[don]

Don't know the exact figures but the RS4 has awesome stopping power.. ...stock..

RS4 front discs = 360mm
rear discs = 312
front tyres = 255/35/18

M3 front discs = 325
rear discs = 328
front tyres = 225/45/18

[JAMES]

nobody here thinks so.
as soon as you chip it the brakes cant hack it.

[FrankC]

The brakes are the only major gripe i have with my RS4.

Lets hope Audi give us brakes to match the performance of the next RS4!

[Conti]

They said they will use carbon/ceramic (?) brakes for the next one!

[FrankC]

Cabon/ceramic?.....will this result in the car being able to shed speed quicker,or does it mean less brake fade?

Sit in the passenger seat of an evo6 under hard braking and it feels like you will land up through the windscreen!

I seem to recall this car held some record for 0-60-0mph..6 sec dead?

[Nickm]

James, I disagree!!! For normal road use stock brakes don't stop you any slower than uprated ones - the only real reason to upgrade is to stop the brakes overheating on track days. Unless something else is changed - like wider tyres (that give more friction) then the stopping distance is identical standard or uprated.

[RS4ever]

The RS4's brakes are excellent on the road. Braking is to do with swept area which remains the same, unless you fit bigger diameter discs and I guess not many are doing that. The only problem the RS4 has is overheating on the track causing brake fade. Drilled discs solve that problem. I know for a fact that they are better than an M3 CSL on the track (not to mention faster as well). I have proved it. In fact the M3 owner is fitting AP brakes because he says the standard ones don't work. Surely, if you can lock up your wheels, your brakes can't get any better.

[don]

I'm glad we have some 'non-track' people commenting on the brakes. I certainly did not mean the brakes would be adequate for track days, but for road use they are far above the standard.

Most of you have probably seen this vid, but if not it is well worth a look. Tiff gives an impressive display comparing the RS4 to S4 stopping power.Just let me know if anyone knows how to correct the aspect ratio, it is a bit tall on my screen.

http://ultra.cto.us.edu.pl/pub/Multimed ... 20Tiff.mpg (31 MB)

Makes sense that drilled discs will help for track days. Can you get away with drilling the stock disc or do you need a new disc upgrade?

[JAMES]

i disagree a couple of hard braking sesions at the end of roads in a chipped rs4 and the brakes are already very hot and not as responsive.i havn't lost them yet but dont trust them.
also at high speed on the motorway the 2 pot calipers are insufficient and disks again heat instantly.

[TarmacTerrorist]

Can only speak from my own experience having driven with standard and uprated brakes both on and off the track. I personally believe the 360mm disks are not the weak link in the standard set up and are more than fit for purpose, it's those poxy 2 pot callipers and there total inability to handle any prelonged exposure to heat. The problem seems to be with with them transfering far too much heat over into the fluid causing it to then overheat and giving you the dreaded brake fade/soft pedal feeling.

I really dont think the drillled quattro gmbh disks will give you any better results in this department either, it's those 2 pots of poo that let the system down again. The extra braking force and extra time before fading you will feel will be soley gained from the pagid yellow pads they supply with the quattro disks. The standard fit Audi pads are as soft as cheese so that the kylie minougue missus will be able to stop the thing at the end of the road on a cold and frosty morning, as such any hard work you put into these pads and they heat up beyond there temperature range and cause fade.

I reckon a set of the same yellow pagids with the standard 360mm discs will give virtually identical results as the drilled Quattro ones, all though I wouldn't advise the yellow pagids to anyone as they will sqeaul like pigs around the town and they reportedly eat the discs like nobody's business. I would suggest that the only real benefit you would gain with the Quattro drilled discs would be when braking in wet motorway conditions as it would elimate the possibilty of a film of water compressing between pad and disk, just dont use the yellow pads that are supplied.

As for braking distance stock vs uprated, it entirely depends on what your doing.

I found anything up to 85/90mph the standard brake set up (with pagid orange pads mind) will give you just as good braking force/ stopping distance in an emergancy as uprated kit would (movit 4 pots now). I have only ever had the standard brakes fade on me once under repeated braking from these sort of speeds and that was at Donnington last year on the GP circuit, which I'm sure that anybody who has done this track will agree that it is very hard on brakes whatever your driving with whatever brake system.

It's at speed in excess of 120 that things seem to get really interesting with the standard 2plops when braking hard, I've described it before as like having two OAP's clinging to the suspension struts trying to clamp the disks with there false teeth, the juddering back through the pedal is attrocious, and this carrys on all the way down to a stand still if you dont let off slightly and re-apply them at timely momments during your deceleration.

The one major benefit I have found with the uprated brakes over the standard kit (at speeds within the law) is the fantastic feed back you get from the pedal as to what is happening down in the wheel wells, I presume this is all down to the extra surface area that the pistons are making with the back of the pads having a four pot system, I can only imagine what the 6 pots must feel like, must be an awesome feeling of feed back even braking from 30.


As always its horses for courses, if you intend tracking the car regulary then get the best uprated kit your money can buy and make it the first mod on your list, no good turning up with a 400+ bhp monster and having to come off every five or ten minutes just when your starting to have fun, plenty of posts on here regards whats on offer and general pricing. If its just a spirited run to the office every morning then a set of pads (pagid blu,ornge) and regular fluid change is all you will need and should get good results over stock pads. If on the other hand it's just the missus dropping the kids off and fetchibng the weekly shop then go buy youself a model helicopter or something.

[TarmacTerrorist]

The M3 is 70kg lighter than the RS4,but the difference in stopping power is
much more noticable in the M3!

M3 will probably have a much better weight ratio front - rear than the rs4, next time you open the bonnets up on both of them look how much further the engine hangs out over the front wheels in the Audi than it does in the Beemer, MMMmmmmm......all that lovely understeer.

flame proof suit on.

[Jani]

There are no great differences in braking between M3 and RS4, when brakes are cold. In fact RS4 is better, see comparison here.

When hot, M3 seems to have the edge. And it also has cr*p brakes if compared to Porsches.

I don't have first hand experience of RS4 stock brakes, but I've sat in one with stock ones, and it is scary on track. Even in quick road use they seem to be on the limit, let alone track. Or German road use, braking from 290 km/h...

Mine is with the quattro brakes, and they worked very well even on track. The discs do get very hot though, the problem is with cooling somehow, they don't pump air like Porsche discs.

Also after the track it took 2 weeks for the brakes to return to normal, pad transfer on disc caused wabbling and even more noise than normal. They do squeel like pigs if not used properly every day. Very annoying in car parks where you hear it.

Then again I heard movit's squeel too...

[Nordschleife]

Pierced/drilled whatever, the standard rotors are heavy and retain heat. The ONLY cure is replacement. Currently, excellent rotors and callipers are available from Mov'it. Mov'it dominates the high performance German market whether we are talking about RS6s, RS4s, Bentleys, Lamborghinis, M3 CSLs, Vipers or Corvettes. Germany is probably the toughest market for brakes you can find, those demanding Autobahn stops on frequently cold brakes together with easy access to circuits like the Nuerburgring.
The experience of driving a RS4 wirth properly set brakes, front and rear, with steel brake lines is epiphanal. Once experienced, never forgotten, really!
R+C

[jukkan]

Jani means my car and yes it is very scary to drive with the standard brakes on a racing track! You can drive maximum 2 laps fast and they´re all gone and then You just have to hope for the best Well now I have Movit´s 370x35mm at the front and they seem to work very well, hope I get soon to a racing track with them! The only problem with Movit´s is that they do squel very hard when they are cold and it´s very annoying!