IanH's 955hp V10 Audi RS6 - Another Car Diary!

[anonymous-user]

andymc said:

great read, is the new RS3 cracking 12 secs for the 1/4 mile?

11.3 secs is the same as a 1997 TVR Cerbera so not that quick. I suspect this thing is better at top speed or maybe standing mile.

[IanH755]

I think the modern obsession with "launch control" to drop the all important 0-60 times, mated with better gearboxes and software really helps these newer cars embarrass something like mine off the line.

Using a US website which does a "estimated 1/4 mile time" based on power, trap speed, weight, tyre size, gearing etc etc my car would theoretically work out to do a 10.5 sec 1/4 mile if everything was perfect which makes sense based on my 11.1 sec with a big 1st-2nd gear change delay.

[ChocolateFrog]

I guess you're always battling weight and 15 year old transmission tech.

[D4MJT]

IanH755 said:

Did 11.27sec at 134mph with a slight engine stumble as it changed from 1st to 2nd which was worth probably 0.25 sec so with a perfect launch on a proper surface (and not cracked concrete) I think I could get into the 10's. It also did a 3.6sec 0-60mph and a 6.16sec 100kph to 200kph which would put me in with the McLaren F1

I've a question if I may Ian, it's hard to phrase as it almost sounds like I'm being cheeky but I assure that's not the case and it is genuine interest!

I absolutely love fast wagons, these are pinnacle RS6 for me and I've been following your thread for some time, but I was a little suprised at the 100-200kmh time, I sort of felt it would be likely to be faster.

Reason I say that is I have a 1 series that's making a lot less power than yours, but I'm at 6.28 100-200kmh which is fairly close. I've no doubt at all after that you'd be putting the legs on me but I also thought that sort 60+ roll would be the perfect killing ground as it were for something with just monstrous power and traction like this.

Do you think there's more in it, or is it simply down to weight of the RS6 and perhaps advances in transmissions (ZF6/ZF8 gearing etc)?

It's bloody rapid either way don't get me wrong!

Hope that comes across as it's meant, I'm most definitely not trying to put the car down at all, I love it, you've created a monster!

[IanH755]

D4MJT said:

Hope that comes across as it's meant, I'm most definitely not trying to put the car down at all, I love it, you've created a monster!

LOL, no probs!

I'd put a lot of it down to a combo of weight (say 2.2 tons with me) and a older-tech TC based gearbox which is a 20+ year old design by now but based on tech thats 30 years old (the ZF 5HP is the starting point) so I've got at least 2 "slow compared to a modern DSG/DCT etc" gear changes I need to go through which is about 0.3 seconds per change vs a DSG-type which is about 0.05 sec per gear change (6 times faster) which all adds up.

Plus your car is bloody rapid - a 100-200 time of 6.2 seconds in a 1 series is as fast as a stock Pagani Zonda F, McLaren P1 or Lamborghini Aventador LP-700 does it (well according to here or here anyway), so your 1 series is extremely rapid anyway!

Edited by IanH755 on Thursday 28th October 20:32

[D4MJT]

IanH755 said:

LOL, no probs!

I'd put a lot of it down to a combo of weight (say 2.2 tons with me) and a older-tech TC based gearbox which is a 20+ year old design by now but based on tech thats 30 years old (the ZF 5HP is the starting point) so I've got at least 2 "slow compared to a modern DSG/DCT etc" gear changes I need to go through which is about 0.3 seconds per change vs a DSG-type which is about 0.05 sec per gear change (6 times faster) which all adds up.

Edited by IanH755 on Thursday 28th October 20:32

I appreciate the reply thanks

That's interesting on all counts! 2.2 tonnes is heavier than I had guessed, but then it's a big old girl and awd etc plus the actual size of the engine

But also on gear changes, that does make perfect sense, I only change once 100-200, I can just clear 200km in the top of 5th, as you say, if I change into 6th it drops another 0.3 secs ish onto my time (my car is ZF8, also TC)

If you ever find somewhere sensible to do it I bet the 200-250 is bloody impressive with that sort of shove

[Gandoolie]

What a brilliantly bonkers read! All power (no pun intended) to you!

[IanH755]

Soooooo, fuel leak issues all sorted (new fuel-line and quick connect) plus some TLC with 10 new spark plugs, 10 new coil packs & a new fuel filter then a little extra safety/fun with an uprated in-tank fuel pump fitted (Walbro) as the old OEM one was starting to drop the rail pressure from 5 BAR down to 3 BAR at 6k+ RPM which could have risking a Lean situation if it dropped any lower so it's now running a stable 4.9BAR all day long.

Having the fuelling sorted certainly helped with the MPG (LOL-PG anyway - 3.6MPG at full throttle, 12MPG around town, 24MPG on a 60mph run) and, in combination with a nice strong new spark, it helped drop my 100-200kph Dragy time down from 6.25 sec to just 5.4 sec so I'm guessing the fuelling issue was maybe more hindering that initially thought.

[Stephen-8c1fb]

I bought my C6 in 2015 after having a much loved WRX. After 3 engines I was getting a little fed up but never thought I would find another drive to match it. Then I saw that Audi had squeezed this V10 and what most consider to be an old mans estate car, which at 66 mine is. That was a game changer for me and seven years later every time I put my foot on that accelerator pedal the hairs on the back of neck stand up. I dont even know if its been modified but at 180 (on the speedo) it was still pulling like it was just getting wound up. Wolf in sheeps clothing does not come close to describing this animal.
I have still got stock breaks and am astonished how good they are.
Is there an easy way to find out if she is remapped?

[IanH755]

Stephen-8c1fb said:

Is there an easy way to find out if she is remapped?

See below

Stephen-8c1fb said:

I dont even know if its been modified but at 180 (on the speedo) it was still pulling like it was just getting wound up.

OEM C6 was limited to 155mph (about 160mph on the speedo) so I'd say yours has some form of map. If you ring MRC Tuning with your Reg No they'll be able to tell you if it has one of theirs added as they're the most popular C6 mapping by far (approx 4 in every 5 mapped cars).

[IanH755]

Hi all, after a bit of "spirited driving" at the weekend I thought my brakes felt a little more 'fadey' than usual so after a quick check I realised I'd not checked my pads in a long time (being abroad for 4 years is an issue) and all my pads were down to a few mm of material left which was a surprising slip-up in my usual maintenance routine.

I'd previously bought some more AP Racing DS25 pads for when they needed changing it was a simple matter to whip the old pads out (2x pins and 2x Allen bolts per caliper), clean up everything and fit the new ones.

Now I just need to bed them in before going silly and, if I remember the first set correctly, these "gas off" quite a surprising amount with lovely clouds of white smoke for the first 5-10 heat cycles.

I also took the time to fix a small water leak into the boot-lid from a seal around a wiring harness and around the inner rear lights, just in time for all this lovely weather.

PS - the old "0-206mph in 36 secs" video when the car was 735hp is now very, very outdated - my guess would be 70-208mph (indicated) in around 18-20 seconds, which was surprising!

[Mezzanine]

The last thing you want with 930bhp is 'fadey' brakes!

Everytime this thread pops up on my list it makes me smile - just a monster project

[Davie_GLA]

I love this thread. Guy stays abroad for ages, comes home and beats the devil out of it with "fadey brakes" not even considering it's mental.

Top work fella, are you aiming for a thousand?

[IanH755]

Davie_GLA said:

I love this thread. Guy stays abroad for ages, comes home and beats the devil out of it with "fadey brakes" not even considering it's mental.

Top work fella, are you aiming for a thousand?

Probably not. I've pretty much max'd out the TTE850+ turbos which were the best available 7 years ago when I first did the 900+ conversion, but there's now the TTE1000+ available and, for the truly mental, an extremely limited set of TTE1200+'s (only 1 so far).

However it'd be £8k+ to drop the engine, get my TTE850 turbos uprated to TTE1000, refit the engine, new mapping etc which is a lot of cash for "bragging rights" of 1000hp when the car is already utterly ludicrous, but on the other hand, should the engine need dropping out for any other work in the future, it'd something I might consider, if I haven't sold the car by then TBF.

[KungFuPanda]

What tyres do you run on such a monster?

I’ve recently bought a D4 Audi S8 which is Stage 2 tuned. It’s clearly running less power than yours but I’m still having problems with torque steer and wet grip. I’m on Dunlop SportMaxx.

[IanH755]

KungFuPanda said:

What tyres do you run on such a monster?

I’ve recently bought a D4 Audi S8 which is Stage 2 tuned. It’s clearly running less power than yours but I’m still having problems with torque steer and wet grip. I’m on Dunlop SportMaxx.

Originally I used Michelin Pilot Super Sports and have just swapped to the newer Michelin Pilot Sport 4S and, other than some tram-lining on Norfolk's heavy HGV rutted roads, I don't get any torque steer even at full throttle.

In the wet and/or cold (<5'c) however I don't use full throttle at any time, but even just 1/4-1/3 throttle is still "adequate" for most overtakes without grip issues etc

I haven't used the Dunlop's but from what I've read so far they aren't considered to be as good as the MPS4S, Continental CSC6 or even the Goodyear Eagle F1AS2's for example so, if you're having issues with them, I'd consider a change rather than struggling and, best case, you can still sell on the Dunlop's as part worns.

[KungFuPanda]

Thanks for that. You’re just confirming what I thought. I’m considering Goodyear Eagle F1 SuperSports.

[IanH755]

Hi All,

Now I'm back in the UK my commute to work is a huge 5 miles a day which, especially over the winter, was taking a toll on the RS6 as it was barely getting up to temp so I've decided for the first time in my life to be semi-sensible-ish and not wreck my lovely, fast, expensive-ish car but instead to wreck a battered, slow, cheap shed instead so I've added another 1 whole Litre and 3 whole Cylinders to my car stable with this immaculate beast!!!!





It's a Citroen C1 with 90k miles, 4 badly mis-matched tyres (1x Snow, 1x All Year, 2x Summer - all from different makes), a "brand new MOT" despite having two bulbs blown (definitely not dodgy at all) and with it being covered in pigeon poop minutes after parking up back at home and yet I absolutely love it it already!!!!

You see I have a "history" with buying a nice expensive, fast car and then, when they keep blowing up, buying a "£500 from eBay" car to run and of the 5 I've had, all have been French and they've mostly been Citroen's and all have been given Top Gear style nicknames based off their reg plate or a silly story about them (C1 "Yappy", C5 "The Death Trap", ZX "Leaky" & BX "The Fridge") and I've had some just immense fun with them, truly "care-free" motoring for me.

So after a quick "lets make sure it's 'safe' at least" test drive (it's fine) I did my usual "I've just bought a crap car on eBay" thing and give it new oil, wipers and replaced the bulbs followed by giving the coolant/PS/brake fluid a check over.

Now I'm not exactly the smallest of guys so it's surprising just how roomy the "4" seater is when there's just me filling up the whole car like this...........

Edited by IanH755 on Sunday 27th March 12:07

[thepeoplespal]

Oldest girl has a red Peugeot 107 (same facelift as your Citroen C1) and it is a hoot to drive especially on a very narrow B road, I call it the Baby 911 with the thrum of it's 3 cylinder and a whole 67bhp, very long geared though, you could get away with 3 gears quite happily.

I've a leggy XF SV8 that has 400 odd bhp to step back into, can't imagine what stepping back into 1000 odd bhp is like.

[IanH755]

So......................an update

My plan, now I'm back in the UK permanently, was to sell the car this summer just gone (2022) to add to my house deposit so, before in preparation for getting it sold I wanted a few niggles sorted, mainly a smokey engine on start and at full throttle and an odd fuel issue which came and went at random, so I dropped of the car at MRC in April for some pre-sales TLC ..........................6 months later it's fixed and slightly faster than before

So what happened, well lets break it down -

Fuel - Occasionally at full throttle it would feel like car had hit a fuel cut (or starvation) but this only started after the new "in-tank" Low Pressure Fuel Pump was replaced with an uprated one so I wondered if I had a sticky injector dumping fuel (and pressure) causing the issue so I had MRC clean and test every injector with no issues found, so they checked further and managed to replicate the fault and it was the one of the engine bay High Pressure Fuel Pumps effectively collapsing (they word they used) under load so we fitted two new HPFP's which solved that. However during mapping the readings from the lambdas were "erratic" so we replaced all 4 lambda's.

Smokey engine - Juuuuuust a simple one way breather is probably failed, or so I thought. After replacing all 5 in the system (at my request) without solving it, MRC then suggested that the Oil separator could do with being replaced as well which didn't cure it sadly. Then they found that the right hand Intercooler was filling with lots of oil, causing the original smokey engine issue. They then traced the leak back to the RH Turbo which by now was 7 years old so understandable. Sadly that meant that the engine and gearbox were dropped and both turbos were sent back to TTE in Germany for a rebuild which seems to have solved that part of the smokey engine issue.

Smokey engine Pt2 - For the 1st 2-3 seconds after start the left bank burnt a tiny amount of oil, showing up as a blue puff of smoke. MRC found that some of the valve stems were leaking so we replaced all 40 of them, 4 per cylinder.

Rear Wiper - These are notorious for corroding and failing as the washer fluid runs through the centre of the spindle and mine had failed whilst at MRC so we replaced that.

Alarm Module - The physical siren unit has a battery inside and mine had corroded causing a fault to be detected in VCDS so we replaced the whole siren unit.

Servicing- As this was "pre-sale" I had a major service done, all fluids and filters (Engine, Gearbox and Diffs), 10 spark plugs, various other filters, seals, gaskets etc replaced.

Re-Map - As part of the rebuild MRC re-mapped the car again now they had a whole new fuel system and new turbos to play with and the car made 955hp (970ps) and 885lbs/ft (1200nm).



So whats next - To be blunt it's time to sell the car!

I've honestly really enjoyed my time with the RS6 but buying a house has now become my absolute priority and the car is just a huge chunk of a deposit sat there being unused for 5 days a week. Plus I now have space for two cars (one for Mon-Fri commuting and one for weekend fun) so I don't have to stick to owning just one car to do both (which the RS6 was great for) so the plan is sell up, buy a house and at some point afterwards consider getting something light and fun for the weekends (say <1000kg and 200-250hp) depending on how screwed I get buying a house with the current interest rate faff!