Track Day Brakes - C7 RS6

[C6NVS]

haha, I knew you'd make the comeback !

Yep, selective storms on the East coast, only good for kite boarding !!

[zzz]

I was going to post a new topic but figured this one fitted.

I've now done 1.5k miles in the car & just got the wheels rebalanced (l've not hit anything nasty but like to keep everything sweet) Anyway, while I was getting the wheels done the guy the owns the garage and races bikes was talking about a recent outing to Doddington where there was a spanking new (2k miles on the clock) rs6 c7.
The guy used the same pit garage as the aforementioned bikers. After a few laps one of the race instructors came over and told the guy he was not giving it enough on the exits much to the guys denial. Fast forward a few more laps and the guy gets pulled off the track with a burned clutch.
I've been given a present of an instructors track day from a friend (I may not use the rss, other decided yet) and the story has put the fear into me. What could have caused this? Was the guy running with tc on and the car was slipping the clutch on corner exits to gain traction? Any ideas? Was it someone here?

[robf]

Sounds bizarre to me!

Although, to be honest, not as bizarre as tacing an RS6 on track! A few laps at the 'Ring for a laugh, fair enough, but why you take a car weighing over 2 tons on track?!

Brake fluid is always the first to go. I have a new GT3 on ceramics and i still boiled the fluid after 5 laps at Brands. You also must turn off stability control control as it is constantly managing the car's attitude with the brakes.

[bam_bam]

Fast forward a few more laps and the guy gets pulled off the track with a burned clutch.

I don't get it, the C7 driver got pulled off the track for a burned clutch?!?! Really?

[zzz]

Agree with the comments on rs6 on track. If I do it, then it'll be once to try to explore the limits of the car more than I could ever do on the road.

Bam. Apparently he had no drive, gear wouldn't engage and a bad smell of melted clutch when it was pulled back in. So literally pulled off the track as opposed to flagged off

It was only a 10 minute anecdotal chat with some guy (didn't have any cause to not believe him), I just wondered if there was something in the TCU/engine management that would cause that to happen on a track drive.

[W8PMC]

Sounds bizarre to me!

Although, to be honest, not as bizarre as tacing an RS6 on track! A few laps at the 'Ring for a laugh, fair enough, but why you take a car weighing over 2 tons on track?!

Brake fluid is always the first to go. I have a new GT3 on ceramics and i still boiled the fluid after 5 laps at Brands. You also must turn off stability control control as it is constantly managing the car's attitude with the brakes.

Why would you not an RS6 on track? Agreed it's going to get bothered by several other cars but would be quicker than many & assuming you drive with a common sense level of sympathy you & the car will do just fine.

I've tracked most of my cars including B7 RS4, C5 RS6, R35 GT-R & never had an issue. My current Stage 2 tuned F10 M5 will happily keep a 991 GT3 honest round Spa, that said it could only hang for a couple of laps & then at that pace i'd have to back off after 2 laps.

[bam_bam]

Bam. Apparently he had no drive, gear wouldn't engage and a bad smell of melted clutch when it was pulled back in. So literally pulled off the track as opposed to flagged off

It was only a 10 minute anecdotal chat with some guy (didn't have any cause to not believe him), I just wondered if there was something in the TCU/engine management that would cause that to happen on a track drive.

Why would there be 'something' in the TCU/ECU that would 'melt' the tiptronic? What are you thinking, that the TCU/ECU detected that the car was on a track and so it decided to grenade the gearbox? I still don't get it.
The 'clutches' on the C7 are wet so I guess you'd have to boil the whole gearbox to smell that, seems implausible and completely indicative of an anecdotal chat with some guy. Some guys spin the strangest stories just to grab your attention or trust, I don't get it, I call bullshit.
Plenty of people have driven these cars on track, including the 'ring, without issue. But, if you track it and it's your risk.

[zzz]

Bam. Apparently he had no drive, gear wouldn't engage and a bad smell of melted clutch when it was pulled back in. So literally pulled off the track as opposed to flagged off

It was only a 10 minute anecdotal chat with some guy (didn't have any cause to not believe him), I just wondered if there was something in the TCU/engine management that would cause that to happen on a track drive.

Why would there be 'something' in the TCU/ECU that would 'melt' the tiptronic? What are you thinking, that the TCU/ECU detected that the car was on a track and so it decided to grenade the gearbox? I still don't get it.
The 'clutches' on the C7 are wet so I guess you'd have to boil the whole gearbox to smell that, seems implausible and completely indicative of an anecdotal chat with some guy. Some guys spin the strangest stories just to grab your attention or trust, I don't get it, I call bullshit.
Plenty of people have driven these cars on track, including the 'ring, without issue. But, if you track it and it's your risk.

@ special track detector. No, if the guy had TC on and as he was coming out of corners and mashing the accelerator so the car was struggling for grip and the TCU was slipping the clutch to regain traction (is that how it works?). I'm guessing as to how he could possibly have knackered his clutch on a few laps of Donington, after this I'll be calling BS too.

Note to self. Stop listening to guys that own tyre garages.

[doodlebug]

Diff not clutch?

[bam_bam]

No, TC brakes spinning wheels.

[wildbore]

Trying to make sense of the story with regard to the reference to clutch(es), I don't see how any of the transmission could be cooked. It is well able to handle the output of the engine and there are other drivetrain components that will suffer and give up first (brakes, diffs, tyres), as the transmission just passes the power down the line.

There are two clutch packs inside the rear differential. If ESP was on and the driver was really giving the car grief in a quick succession of corners, I could imagine the rear diff clutch packs starting to object. I would have thought that the diff control module would have interceded before that point, though (I am pretty sure there is a "Diff too hot" warning message). Also, I would have expected the diff CM to talk to the ESP unit. Maybe the driver missed some on-screen warnings in the driver console? Just speculating...

[W8PMC]

This can only be a car with a pre existing issue, albeit only came to light when hammering it.

Audi RS's can play on track all day with just simple consideration for the weight of the car. Consumables such as pads will take a hammering due to weight, but assuming the car's warmed up & cooled down correctly a few track days wouldn't trouble an RS6.

[robf]

Sounds bizarre to me!

Although, to be honest, not as bizarre as tacing an RS6 on track! A few laps at the 'Ring for a laugh, fair enough, but why you take a car weighing over 2 tons on track?!

Brake fluid is always the first to go. I have a new GT3 on ceramics and i still boiled the fluid after 5 laps at Brands. You also must turn off stability control control as it is constantly managing the car's attitude with the brakes.

Why would you not an RS6 on track? Agreed it's going to get bothered by several other cars but would be quicker than many & assuming you drive with a common sense level of sympathy you & the car will do just fine.

I've tracked most of my cars including B7 RS4, C5 RS6, R35 GT-R & never had an issue. My current Stage 2 tuned F10 M5 will happily keep a 991 GT3 honest round Spa, that said it could only hang for a couple of laps & then at that pace i'd have to back off after 2 laps.

Why? Thought it would be pretty obvious; doesn't sound much fun understeering around a track all day whilst eating up consumables because it weighs the same as a bus.

Also, you have undone your own argument there saying your M5 only lasts 2 laps! Given the F10 has silly power as standard, the Stage 2 M5 must have a huge advantage down the 2 big straights at Spa. Besides, track days are meant to be fun; not for setting times which loops round to my original argument that an RS6 is not suited as a track day car whatsover. That's not to see i wouldn't do one just for a laugh.

[IanH755]

Besides, track days are meant to be fun

Even in an RS6 too, unless you're trying to set lap records

I do track days purely for the fun of it, whether I'm in my mates stripped-out track Clio or a 2 ton V10 powered missile. All I try to do is show some improvement through-out the day and if I do then I'm happy.

[W8PMC]

Sounds bizarre to me!

Although, to be honest, not as bizarre as tacing an RS6 on track! A few laps at the 'Ring for a laugh, fair enough, but why you take a car weighing over 2 tons on track?!

Brake fluid is always the first to go. I have a new GT3 on ceramics and i still boiled the fluid after 5 laps at Brands. You also must turn off stability control control as it is constantly managing the car's attitude with the brakes.

Why would you not an RS6 on track? Agreed it's going to get bothered by several other cars but would be quicker than many & assuming you drive with a common sense level of sympathy you & the car will do just fine.

I've tracked most of my cars including B7 RS4, C5 RS6, R35 GT-R & never had an issue. My current Stage 2 tuned F10 M5 will happily keep a 991 GT3 honest round Spa, that said it could only hang for a couple of laps & then at that pace i'd have to back off after 2 laps.

Why? Thought it would be pretty obvious; doesn't sound much fun understeering around a track all day whilst eating up consumables because it weighs the same as a bus.

Also, you have undone your own argument there saying your M5 only lasts 2 laps! Given the F10 has silly power as standard, the Stage 2 M5 must have a huge advantage down the 2 big straights at Spa. Besides, track days are meant to be fun; not for setting times which loops round to my original argument that an RS6 is not suited as a track day car whatsover. That's not to see i wouldn't do one just for a laugh.

I never said my M5 lasts only 2 laps as i can happily run a session of up to 10-12 laps at Spa, i said when pushing closer to the cars & my limits as in playing with the 991 GT3's i had to be sympathetic & then could only really put 2-3 hot laps together at 90-95% capacity but i don't run on track at that level all the time. Also after say 10 laps i'd want to come off to calm down & take a breather.

Neither the RS6 or M5 are great track cars but they're designed to be driven quickly & can play confidently on track all day. Yes the pads will take more of a beating than the lighter cars but it's only pads & fuel that take a bashing as i'm still on my original discs after around 8 track days in the UK & Europe & 22k miles.

My M5 also doesn't suffer badly with understeer & the oversteer is controllable. I did however upgrade the Springs & Pads along with the extra power so it's more than capable in the corners as well as the straights & very few cars were able to worry the M5 but yes they could stay out longer when pushing hard.