IanH's 955hp V10 Audi RS6 - Another Car Diary!
Discussion
IanH755 said:
Considering the size, at 12.5kg per disc they're actually 4kg lighter per disc than OEM (16.5kg) which is fantastic and only 2kg heavier than the AP Racing 390mm discs I currently have.
Thats pretty good. I was amazed how little mine weighed given the 345mm rotors I took off weighed 12kg each.
My Rear Diff - IT GO BOOOOOOMMMMM!!!!!!
Well it's more of whine to be more accurate (sorry the click-bait
)
With a 100k+ mile car pushing 900hp+ for the last 8000 miles it's no wonder there was going to be a weak spot found eventually. I was expecting it to be a driveshaft TBH but the rear diff was also a worry (front diff/transfer box all in uprated GB) as well as potentially the wheel bearings (replaced during 900 conversion).
I dropped it off at the garage last night and they've just confirmed the bearings had failed and were making some quite impressive noise on the lift
So heres my symptoms and a quick vid of the noise for those who are interested -
Whine only present when pressing the throttle, even just 1-2%. No whine when off throttle.
Noise is road speed dependant not gear/rev. I tried 2nd-6th at 40mph so 5500rpm to 1500rpm and the whine stays the same.
Noise starts from 20mph to 100+ and the whine starts as a low freq low volume noise. At 40 and 60mph the volume peaks (resonance) and then rises to extremely high freq low volume by 100mph+.
Cornering & bumps have no effect on the noise nor does braking (if you keep the throttle pressed too).
Passenger's in the back seat at the time said there was "buzzing" by their feet under load.
The rest of the car drives, stops & handles exactly as before but the MPG was down slightly (6 less MPG shown when doing 60mph on a motorway) due to the increased drag in the drivetrain.
In the video I'm just tapping the accelerator a tiny amount every 1-2 seconds so the noise appears/disappears making it easier to hear the difference.
Video - https://www.youtube.com/watch?v=74gSiI0vT80
So my initial plan was to check with Audi for costs/time for a new one. After the call I had a cry and a sit down (which was very difficult considering the vigorous bumming Audi^^^ gave me) and then got around to finding a decent gearbox place in Kent to get it rebuilt instead for under half the price of a new one. It should be all back running next week with my new brakes fitted, new diff and a considerably lighter wallet!
PS Warranties are very important! If your current one runs out and can't be extended (car now over 100k miles) then get another one pronto! Doh!
^^^Audi wanted £4300 with an unspecified waiting time as they had none anywhere, not even in Germany.
Well it's more of whine to be more accurate (sorry the click-bait
)With a 100k+ mile car pushing 900hp+ for the last 8000 miles it's no wonder there was going to be a weak spot found eventually. I was expecting it to be a driveshaft TBH but the rear diff was also a worry (front diff/transfer box all in uprated GB) as well as potentially the wheel bearings (replaced during 900 conversion).
I dropped it off at the garage last night and they've just confirmed the bearings had failed and were making some quite impressive noise on the lift
So heres my symptoms and a quick vid of the noise for those who are interested -
Whine only present when pressing the throttle, even just 1-2%. No whine when off throttle.
Noise is road speed dependant not gear/rev. I tried 2nd-6th at 40mph so 5500rpm to 1500rpm and the whine stays the same.
Noise starts from 20mph to 100+ and the whine starts as a low freq low volume noise. At 40 and 60mph the volume peaks (resonance) and then rises to extremely high freq low volume by 100mph+.
Cornering & bumps have no effect on the noise nor does braking (if you keep the throttle pressed too).
Passenger's in the back seat at the time said there was "buzzing" by their feet under load.
The rest of the car drives, stops & handles exactly as before but the MPG was down slightly (6 less MPG shown when doing 60mph on a motorway) due to the increased drag in the drivetrain.
In the video I'm just tapping the accelerator a tiny amount every 1-2 seconds so the noise appears/disappears making it easier to hear the difference.
Video - https://www.youtube.com/watch?v=74gSiI0vT80
So my initial plan was to check with Audi for costs/time for a new one. After the call I had a cry and a sit down (which was very difficult considering the vigorous bumming Audi^^^ gave me) and then got around to finding a decent gearbox place in Kent to get it rebuilt instead for under half the price of a new one. It should be all back running next week with my new brakes fitted, new diff and a considerably lighter wallet!
PS Warranties are very important! If your current one runs out and can't be extended (car now over 100k miles) then get another one pronto! Doh!
^^^Audi wanted £4300 with an unspecified waiting time as they had none anywhere, not even in Germany.
This is the first i've came across this thread and i have to say your car is incredible, well done!
IanH755 said:
PS Warranties are very important! If your current one runs out and can't be extended (car now over 100k miles) then get another one pronto! Doh!
Would a warranty cover such a modified car?
got my car back with a new rear diff and the AP Racing 410mm Radi-Cal setup with custom braided brake lines.Brakes re-bled (got some air out) and pads bedded releasing a vast quantity of smoke and the brakes are stunning!!!
I'm hitting the tyres grip limit at *well* above motorway speeds which is much better than before where it braked strongly down from high speed to 70mph-ish before starting to chirp the tyres.
Now I just need to sort the knocking from the OSF DRC strut which is leaking at a union in the arch. I've got a 10k servicing, GB service and DRC re-pressurisation at Unit20 in a few weeks so hopefully everything will be well afterwards!!!
I'm hitting the tyres grip limit at *well* above motorway speeds which is much better than before where it braked strongly down from high speed to 70mph-ish before starting to chirp the tyres.
Now I just need to sort the knocking from the OSF DRC strut which is leaking at a union in the arch. I've got a 10k servicing, GB service and DRC re-pressurisation at Unit20 in a few weeks so hopefully everything will be well afterwards!!!
IanH755 said:
Brakes re-bled (got some air out) and pads bedded releasing a vast quantity of smoke and the brakes are stunning!!!
I'm hitting the tyres grip limit at *well* above motorway speeds which is much better than before where it braked strongly down from high speed to 70mph-ish before starting to chirp the tyres.
Very good. Pics needed though...I'm hitting the tyres grip limit at *well* above motorway speeds which is much better than before where it braked strongly down from high speed to 70mph-ish before starting to chirp the tyres.
IanH755 said:
Now I just need to sort the knocking from the OSF DRC strut which is leaking at a union in the arch. I've got a 10k servicing, GB service and DRC re-pressurisation at Unit20 in a few weeks so hopefully everything will be well afterwards!!!
Hmmm. One of my friends has just spent 2k repairing a fault one is RS4's DRC system, so I'm sure that'll be cheap!So then, TLC time!!!
I've been buying a few bits just to sort out some of the cosmetic issues I have from it being a 100k mile daily driver -
The cleaning rags filled a 35L bin to make them look that good, they were filthy! It was mainly the calipers with 100k miles of baked on grime!
I've been buying a few bits just to sort out some of the cosmetic issues I have from it being a 100k mile daily driver -
- Fitted a new front splitter to replace the badly battered and bruised one which the previous owner had glued 2 Laser Jammers too. During their none too subtle removal by MRC (think chisels/screwdrivers were used) the plastic splitter was scratched to pieces and cosmetically wrecked. Simple job to replace, 5x Torx bits and some trim poppers, took about 15mins after I'd got the car jacked up after Tea.
- Changed the license plate holder screws (rusted) & broken plastic protectors for a new set.
- Tomorrow I'll be fitting a new engine undertray, just need 15 1/4 turn fasteners from Audi - no point fitting old rusty ones.
- Friday is the 10k service at Unit20 and DRC re-pressure and I'll also get some pics of the new brake setup too.
- Found some rust in the NSR arch which needs sorting before winter starts.
The cleaning rags filled a 35L bin to make them look that good, they were filthy! It was mainly the calipers with 100k miles of baked on grime!
Thanks for the update. Still possibly one of the most interesting and exciting 'my car is... 900bhp' threads on PH.
Those brake discs are enormous. Great to see you actually driving a car of this power level daily and most importantly (unlike so many owners of cars at this power level) - you're actually and actively maintaining it.
Keep going - look forward to more pictures.
Those brake discs are enormous. Great to see you actually driving a car of this power level daily and most importantly (unlike so many owners of cars at this power level) - you're actually and actively maintaining it.
Keep going - look forward to more pictures.
Busy day up at Unit20 in the Wirral -
10k Servicing
Gearbox Service
Rear Diff Oil re-fill
New engine undertray fitted
Front suspension arm noise located (to be dealt with next month)
DRC suspension leak found (to be dealt with next month)
Other than the servicing bits, we found that the creaking/clunking noise was from the suspension arms and that the DRC leak, which was a slight weep a month ago, has now stopped (yay) but the flexible pipes are very badly corroded and need replacing before it can be re-pressurised (boo) so, with 100k miles on them, it'd be rude not to replace the struts at the same time for a complete suspension refresh (yay-me/boo-wallet).
10k Servicing
Gearbox Service
Rear Diff Oil re-fill
New engine undertray fitted
Front suspension arm noise located (to be dealt with next month)
DRC suspension leak found (to be dealt with next month)
Other than the servicing bits, we found that the creaking/clunking noise was from the suspension arms and that the DRC leak, which was a slight weep a month ago, has now stopped (yay) but the flexible pipes are very badly corroded and need replacing before it can be re-pressurised (boo) so, with 100k miles on them, it'd be rude not to replace the struts at the same time for a complete suspension refresh (yay-me/boo-wallet).
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