IanH's C6 RS6 - 955hp & 1200nm - Updated 09 Feb '24

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IanH755
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Re: IanH's C6 RS6 955hp & 1200nm - Updated 08 Oct 22

Post by IanH755 » Tue Feb 15, 2022 7:23 pm

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PS - the old "0-206mph in 36 secs" video when the car was 735hp is now very, very outdated - my guess would be 70-208mph (indicated) in around 18-20 seconds, which was surprising!
Last edited by IanH755 on Sat Oct 08, 2022 2:56 pm, edited 2 times in total.
***OLD*** Daytona C5 RS6 Avant - MRC'd - 500HP & 820NM (PistonHeads Link).

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Re: IanH's C6 RS6 900+ spec - Updated 15 Oct 21

Post by don0301 » Wed Feb 16, 2022 10:50 am

How did you get 208 indicated?

Mine stuck at 207 indicated/333km/h.

Thought that was the max. the car will read too?
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Re: IanH's C6 RS6 900+ spec - Updated 15 Oct 21

Post by don0301 » Wed Feb 16, 2022 10:52 am

don0301 wrote:
Wed Feb 16, 2022 10:50 am
How did you get 208 indicated?

Mine stuck at 207 indicated/333km/h. on the readout. The needle kept going but found it just about unreadable at that speed.

Thought that was the max. the car will read too?
Ferrari 488 Spider
C6 RS6
E46 M3 convertible
Nissan 200sx mk 2
Vauxhall Senator
Ford Sierra 1.8LX
Peugeot 205 1.9 GTi
Vauxhall Belmont SRi
Vauxhall Astra 1.3
Vauxhall Astra 1.3
1st car Datsun 120 FII Lime green....yeah :shock:

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IanH755
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Re: IanH's C6 RS6 900+ spec - Updated 15 Oct 21

Post by IanH755 » Wed Feb 16, 2022 9:12 pm

don0301 wrote:
Wed Feb 16, 2022 10:52 am
How did you get 208 indicated?

Mine stuck at 207 indicated/333km/h. on the readout. The needle kept going but found it just about unreadable at that speed.

Thought that was the max. the car will read too?
There's a few videos on YouTube of the digital & needle speedo going past 333kmh so I'm not sure why yours won't -

https://www.youtube.com/watch?v=fGZlLQEtg5E - 378kmh
https://www.youtube.com/watch?v=9w1-pX040xU - 350kmh
https://www.youtube.com/watch?v=rGr5CkXckKs - 350kmh

I'd though that 217mph/350kmh was the max top speed the digital display would show (needle would still move) but that 378kmh run in the top video says I'm wrong :D

As for mine I have a 10hz GPS timer (Qstarz BT-818XT) linked to an App store data recorder that I use to track my top speeds so for example I know that my 206mph indicated was bang on 200mph "actual" speed (a bit lucky TBH).
***OLD*** Daytona C5 RS6 Avant - MRC'd - 500HP & 820NM (PistonHeads Link).

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Re: IanH's C6 RS6 900+ spec - Updated 15 Oct 21

Post by don0301 » Thu Feb 17, 2022 10:42 am

Yeah I knew "continental" ones read higher. Maybe it's because I have the pre facelift speedo? pre facelift MMI? *shrug*

Yeah I used a racelogic gps which read 203 iirc 213 on speedo *ish* 207 on digital readout. Car was still pulling slightly but had to shut off.

Only did it once to see what it would do :biggrin3:
Ferrari 488 Spider
C6 RS6
E46 M3 convertible
Nissan 200sx mk 2
Vauxhall Senator
Ford Sierra 1.8LX
Peugeot 205 1.9 GTi
Vauxhall Belmont SRi
Vauxhall Astra 1.3
Vauxhall Astra 1.3
1st car Datsun 120 FII Lime green....yeah :shock:

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IanH755
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Re: IanH's C6 RS6 900+ spec - Updated 15 Oct 21

Post by IanH755 » Thu Feb 17, 2022 6:58 pm

I'm due to head back to Germany on a work-based course sometime in the near future (Russia/Ukraine depending) so if I get the chance I'll have a look and try to film it.
***OLD*** Daytona C5 RS6 Avant - MRC'd - 500HP & 820NM (PistonHeads Link).

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Re: IanH's C6 RS6 900+ spec - Updated 15 Oct 21

Post by IanH755 » Sat Oct 08, 2022 2:55 pm

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 :D

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).

Image

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!
***OLD*** Daytona C5 RS6 Avant - MRC'd - 500HP & 820NM (PistonHeads Link).

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Re: IanH's C6 RS6 - 955hp & 1200nm - Updated 08 Oct 22

Post by welwynnick » Wed Nov 23, 2022 5:06 pm

The end of an era!

Too bad this thread isn't in the RS6 C6 forum anymore.

Edit: I'm being slow. It's just occurred to me that you now have quite a bit more power and torque that you did to start with. Great curves. Was that down to fuelling? Tuning? Intercoolers? You didn't sneak some TTE1000's in there did you?

All the best,

Nick

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Re: IanH's C6 RS6 - 955hp & 1200nm - Updated 08 Oct 22

Post by Fatneck73 » Thu Nov 24, 2022 5:03 pm

Wow. Sorry to hear this Ian. All the best going forward. Would love to know what sort of £ you are asking for the car 😜😜😜

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Re: IanH's C6 RS6 - 955hp & 1200nm - Updated 08 Oct 22

Post by IanH755 » Thu Nov 24, 2022 6:35 pm

welwynnick wrote:
Wed Nov 23, 2022 5:06 pm
Edit: I'm being slow. It's just occurred to me that you now have quite a bit more power and torque that you did to start with. Great curves. Was that down to fuelling? Tuning? Intercoolers? You didn't sneak some TTE1000's in there did you?
Hi Nick,

I've absolutely no idea :D

I never specifically asked MRC to re-map it so I was completely shocked when I picked it up and they presented me with a new dyno chart, so much so that I even got them to check twice (once on the system and once with Doug) that the new dyno chart was actually for my car :D

I did however ask for the map to be checked as I was those having fuelling issues that I mentioned above, so I think they may have got carried away :D The only things changed which would effect the map were the rebuilt TTE-850 spec turbos, both HPFP's and the Lamba's so I'm guessing the refurbed turbos + new MRC mapping software did a trick of adding 50hp over the original 903hp the TTE-850's made way back in 2015.
***OLD*** Daytona C5 RS6 Avant - MRC'd - 500HP & 820NM (PistonHeads Link).

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Re: IanH's C6 RS6 - 955hp & 1200nm - Updated 08 Oct 22

Post by fazily » Wed Feb 08, 2023 5:47 pm

bet that doesn't hang around! 955hp and 1200nm, impressive doesn't quite cut it!

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Re: IanH's C6 RS6 - 955hp & 1200nm - Updated 08 Oct 22

Post by IanH755 » Fri Jun 16, 2023 8:40 am

Ah Balls!

RS6 1 - Fox 0 but its a very pyrrhic victory to the RS6 as the fox, whilst now chasing chickens in the big farm in the sky, broke my bumper in the process! I've never had to do any body repair type stuff (I'm amazed considering how I drive at times TBH) so I've no idea yet if this damage is considered "repairable" on a 200mph+ car (probably not, I've only just noticed the rear bit by the arch has a big bit snapped off too) or whether it'll be have to be a new £1300+ bumper required, alongside the broken black "air guide" which I've already sourced a replacement for and oddly Audi were the cheapest suppliers.

Image

Image

I was coming back from a gig at about 2am and doing a genuine 50-ish mph on some (new to me) twisty B-roads as I came around a long left hander and saw movement of something "brown" on the grass verge on the left. The most annoying thing was the fox (seen as the lower orange blob in the masterpiece below) would have been perfectly safe just staying still or following the other smaller fox away from the verge but instead, despite braking from 50-ish and already moving over into the opposite lane to give them space, the lunatic decided to run right infront of me. I stopped to check my car over and on the fox and that thing was D.E.A.D, I think it's head may have gone under the rear tyre as it was very obviously flattened so at least it was instant for the fox, the little git!

Image
***OLD*** Daytona C5 RS6 Avant - MRC'd - 500HP & 820NM (PistonHeads Link).

***NEW*** Daytona C6 RS6 Avant - MRC'd - 955HP & 1200NM (PistonHeads Link)

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Re: IanH's C6 RS6 - 955hp & 1200nm - Updated 08 Oct 22

Post by IanH755 » Sat Jun 24, 2023 8:07 pm

Update - Soooooo, new bumper and air guide have arrived ready for painting, parts swap over (grills, parking sensors etc) and then fitment. However the car is popping into MRC on Monday for a few days to sort out the following -

1. Non-working Aircon (oh boy do I need it now) which hasn't worked since the engine was refitted so suspect a forgotten plug etc (been checked for gas and its full).

2. Rear diff being replaced to hopefully cure the sticking needle bearing noise.

3. Leaky washer bottle which may/may not be cracked or have a loose pipe as it leaks onto the floor at random.

4. Missing anti-rattle clips from my AP calipers (originals "lost" during a Kwik-fit pad change - lesson learned).

5. OEM Brake Pad warning light, and as I don't have those I've cut, joined and tried up the loom for this which looks to have come loose post Fox impact.

When I have the bumper painted I'm thinking about having both rear arches also sorted as they're starting to rust.

I also checked by front AP discs for wear as I was concerned that after 20k miles they may be worn - LOL, not even close! Got my micrometer on them and both measured at various points at 35.2mm (34mm limit) but my pads are down to about 3mm of material (7mm when new) So I'll probably need more pads at some point and, despite being a huge fan of Ferodo's DS2500 compound which I've used for years, I've now found that they also do their new DS3.12 compound in my pad shape now, so something I might look into based on the reviews I've seen, even for a "street" car.
***OLD*** Daytona C5 RS6 Avant - MRC'd - 500HP & 820NM (PistonHeads Link).

***NEW*** Daytona C6 RS6 Avant - MRC'd - 955HP & 1200NM (PistonHeads Link)

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Re: IanH's C6 RS6 - 955hp & 1200nm - Updated 08 Oct 22

Post by IanH755 » Wed Jul 05, 2023 10:30 pm

Back from MRC and almost everything has been sorted -

1. Aircon now works - plug reconnected on sensor.

2. Rear diff replaced however it's turned out to NOT be the source of the diff whine, which was still there afterwards. MRC now suspect its the transfer box/centre diff making the noise which is apparently being quite hard to pin down.

3. The Washer pump and seal replaced and no more leaks.

4. Anti-rattle clips fitted to front calipers.

5. Shorting plug/loom remade which gets rid of the false low pads error.

6. New front bumper painted and fitted, it also broke a mounting bracket which needed replacing too.

I'm not entirely sure what I'm going to do with this diff whine. I'll chat to a few ZF gearbox repair places and see if it can be looked at with the gearbox in the car or not. From the exploded diagram of the box it looks doable whilst still fitted if (and its a big if) its the bearing I think it might be based on the current guess of noise location (last one on the output shaft just before it connects to the propshaft).
***OLD*** Daytona C5 RS6 Avant - MRC'd - 500HP & 820NM (PistonHeads Link).

***NEW*** Daytona C6 RS6 Avant - MRC'd - 955HP & 1200NM (PistonHeads Link)

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Re: IanH's C6 RS6 - 955hp & 1200nm - Updated 08 Oct 22

Post by HPsauce » Wed Jul 05, 2023 10:47 pm

Having seen this beast this evening, it is pretty awesome! :thumbs:
Not sure about the exhaust smoke though....... :thumbsdown:

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