Hi all,
Getting my S4 Avant chipped next week (MRC) but realise I need much better stoppers. Should I look at RS4 brakes or go for Brembo, AP Racing etc..? Budget is an issue I'm afraid.....
S4 Brakes vs RS4 Brakes
RE: S4 Brakes vs RS4 Brakes
Speak to Keith at Dialynx, he is doing a conversion based on RS4 discs, need 18" wheels.
99 Ming Saloon, Tanoga S/S, De-cat APR D/Ps, Miltek catback, Forge DVs, RS4 suspension, K04s, I/Cs, MAF, Clutch, injectors, oil cooler, airbox, Y pipe, spark plugs, front brakes, Vast EFK, Walbro fuel pump, MRC custom tune, 18" B7 RS4 reps, Kumho tyres
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RE: S4 Brakes vs RS4 Brakes
why would anybody replace one lot of useless brakes with another lot of useless brakes, unless you are taking the punters for a ride?
I agree with Don:
I have the RS4 calipers and Quattro gmbh drilled discs and noticed quite a big improvement over the standard S4 setup.
Having driven an RS4 with Movits, they are an improvement again over what I have and probably the ideal along with Brembo/993 Big Reds/AP Racing.
Of course, the cost difference is significant and must be weighed up with the likely use/abuse they will cope with.
I ran my S4 with 325bhp for 4 years without problem and it wasn't until I had the full K04 conversion carried out (with other bits) that the brakes were definitely 'the weakest link'.
HTH,
Simon
K04's, full Milltek, Forge DV's, Tanoga, H&R, RS4 calipers with Quattro gmbh
discs, AWE DTS, S4 18" B6 alloys.
I have the RS4 calipers and Quattro gmbh drilled discs and noticed quite a big improvement over the standard S4 setup.
Having driven an RS4 with Movits, they are an improvement again over what I have and probably the ideal along with Brembo/993 Big Reds/AP Racing.
Of course, the cost difference is significant and must be weighed up with the likely use/abuse they will cope with.
I ran my S4 with 325bhp for 4 years without problem and it wasn't until I had the full K04 conversion carried out (with other bits) that the brakes were definitely 'the weakest link'.
HTH,
Simon
K04's, full Milltek, Forge DV's, Tanoga, H&R, RS4 calipers with Quattro gmbh
discs, AWE DTS, S4 18" B6 alloys.
how about the Porsche brakes package that AMD offer?
Clive
S2 ABY coupe, S4 B5 saloon, S4 B6 avant
RS4 B7 phantom black saloon, mint, fully loaded, low mileage - FOR SALE!- http://www.rs246.com/index.php?name=PNp ... ic&t=88981
S8 D2 facelift, RS6 C5 saloon, both gone but not forgotten
S2 ABY coupe, S4 B5 saloon, S4 B6 avant
RS4 B7 phantom black saloon, mint, fully loaded, low mileage - FOR SALE!- http://www.rs246.com/index.php?name=PNp ... ic&t=88981
S8 D2 facelift, RS6 C5 saloon, both gone but not forgotten
Keith only uses the RS4 discs, calipers are RS6 or Big reds can't remeber which.
99 Ming Saloon, Tanoga S/S, De-cat APR D/Ps, Miltek catback, Forge DVs, RS4 suspension, K04s, I/Cs, MAF, Clutch, injectors, oil cooler, airbox, Y pipe, spark plugs, front brakes, Vast EFK, Walbro fuel pump, MRC custom tune, 18" B7 RS4 reps, Kumho tyres
What Keith uses are Brembo 6 pot calipers which were designed for a GT3 I believe. With a small modification they fit the RS4 perfectly and look good. He fitted mine as a bit of an experiment 6 weeks ago and they're very good. Used them at Croft recently and no real noticeable fade with the yellow pagid pads. Significant improvement on the original 2 pots which as people have said are adequate for normal use but no good for really fast driving/trackdays.
There was a big discussion on the forum recetly about the cooling for RS4 brakes and the issue of warped discs which I found quite helpful too. Some really detailed stuff from guys who know a lot more about it than me. As a result Gav, Dave P. and I all took time making sure the discs were cool after each session at Croft and none of us have had problems. We were each running slightly different set ups as well.
All I can say is I was braking as well as the Movit guys as far as I could tell and Keith did the work for less than half what QST charge for the front Movit kit.
I know his opinion is that the calipers are the main weakness of the RS4 brakes rather than the discs and from my limited experience this would appear to be mostly true. I did give him more detailed feedback about them since he wanted to use mine as an example of this upgrade. Not my job to advertise so if you want to know more contact him or pm me. 
There was a big discussion on the forum recetly about the cooling for RS4 brakes and the issue of warped discs which I found quite helpful too. Some really detailed stuff from guys who know a lot more about it than me. As a result Gav, Dave P. and I all took time making sure the discs were cool after each session at Croft and none of us have had problems. We were each running slightly different set ups as well.
All I can say is I was braking as well as the Movit guys as far as I could tell and Keith did the work for less than half what QST charge for the front Movit kit.
I know his opinion is that the calipers are the main weakness of the RS4 brakes rather than the discs and from my limited experience this would appear to be mostly true. I did give him more detailed feedback about them since he wanted to use mine as an example of this upgrade. Not my job to advertise so if you want to know more contact him or pm me. Managed to take a quick picture to show you. Dirty wheels but you can see why they need to be 18". Could have had them any colour but like the original Porsche red. It also reminds me of the Movits on my previous S3 which were excellent but even they were a lot more costly than this option
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The price Keith quoted me was very reasonable and it looks a good combo. Those calipers are massive!
99 Ming Saloon, Tanoga S/S, De-cat APR D/Ps, Miltek catback, Forge DVs, RS4 suspension, K04s, I/Cs, MAF, Clutch, injectors, oil cooler, airbox, Y pipe, spark plugs, front brakes, Vast EFK, Walbro fuel pump, MRC custom tune, 18" B7 RS4 reps, Kumho tyres
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be very careful of the stock RS4/RS6 rotor.
it is extremely heavy.
The basic design is flawed, in use it is virtually impossible for air to enter into the veins at the centre of the disk and be spun out.
It overheats and gets too hot, look at all the photographs of rotors glowing red under use.
Get rid of it. Lamborghini is learning to get rid of it, having had it wished upon them by Audi.
Use a hat and mount a decent rotor upon it. You can buy the Porsche GT3 Cup rotors from the racing department at Porsche cheaper than the street GT3 rotor, if you can't stretch to Mov'it's custom made rotors.
Please realise that Mov'it makes very serious brakes, i know pweople replacing their Porsche brakes with Mov'it brakes, on their Porsches. The recent Porsche which set the world braking record for a street car did it with Mov'it brakes.
I'm sorry, but some little man in a shed who tells you that the stock RS4 rotors are OK, is talking out of his arse, and has he ensured that he has picked a compatible piston size for the replacement callipers, otherwise he will <beep> up the ABS operation, and hence the ESP. If you think this is basic stuff, it is, but then any 'brakeman' knows that the rotors are a piece of junk, so it might just pay to take a little time to be sure, and does he even know how to calculate what piston sizes are compatible?
Remember, if your brakes don't behave when you need them, you might end up toast.
R+C
it is extremely heavy.
The basic design is flawed, in use it is virtually impossible for air to enter into the veins at the centre of the disk and be spun out.
It overheats and gets too hot, look at all the photographs of rotors glowing red under use.
Get rid of it. Lamborghini is learning to get rid of it, having had it wished upon them by Audi.
Use a hat and mount a decent rotor upon it. You can buy the Porsche GT3 Cup rotors from the racing department at Porsche cheaper than the street GT3 rotor, if you can't stretch to Mov'it's custom made rotors.
Please realise that Mov'it makes very serious brakes, i know pweople replacing their Porsche brakes with Mov'it brakes, on their Porsches. The recent Porsche which set the world braking record for a street car did it with Mov'it brakes.
I'm sorry, but some little man in a shed who tells you that the stock RS4 rotors are OK, is talking out of his arse, and has he ensured that he has picked a compatible piston size for the replacement callipers, otherwise he will <beep> up the ABS operation, and hence the ESP. If you think this is basic stuff, it is, but then any 'brakeman' knows that the rotors are a piece of junk, so it might just pay to take a little time to be sure, and does he even know how to calculate what piston sizes are compatible?
Remember, if your brakes don't behave when you need them, you might end up toast.
R+C
I don't see why they wouldn't fit an Audi,,,but the Cup car discs with calipers and pads come in at about 1500 quid from Porsche motorsport.
They look enormous!
I often buy parts from them way cheaper than Porsche centre prices.
There is a lot of banter about pads on these forums, but with Porsche brakes, i have no problem with standard compound on road & track (Brands GP last week) they are cheap as well around 60-70 quid a set.
They look enormous!
I often buy parts from them way cheaper than Porsche centre prices.
There is a lot of banter about pads on these forums, but with Porsche brakes, i have no problem with standard compound on road & track (Brands GP last week) they are cheap as well around 60-70 quid a set.
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