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

[TheAngryDog]

IanH755 said:

Its a QStarz BT-Q818XT 10hz GPS puck (uses Bluetooth so can be left on the roof etc) and a really old version of the RaceChrono software - The newer Android version doesn't have performance tests as it's more of a laptimer now hence the older Symbian phone to run it which is a massive shame as the functionality and customisations allowed are amazing - you can set your own Xmph to XXXmph limits, your own distance times etc completely as you want, not via a preset setup!

Edited by IanH755 on Sunday 15th July 21:18

Thanks. Can you still get the symbian version?

[IanH755]

Yeap, from here - http://racechrono.com/legacy

[IanH755]

Just back at Unit20 having a post rebuild inspection before I head down to MRC on Wednesday and after a 60 milemotorway run I got this MPG reading. Not bad for 900hp although I realise it's an ECU thing with my non-OEM injectors.

• *EDIT** - Unit20 gave it a full health check and gave it a thumbs up so all's good for Wednesday now!

Edited by IanH755 on Monday 16th July 23:11

[IanH755]

So back from MRC with a full bill of health and just over 870hp which wasn't helped by the KWE I/C's poor thermal abilities on a Dyno. We made an extra 30ps (25hp) from the first run just by letting the car cooldown so that the ambient temps were 20'c rather than 50'c when it arrived which just shows how poor theSo back from MRC with a full bill of health and just over 870hp which wasn't helped by the KWE I/C's poor thermal abilities on a Dyno. We made an extra 30ps (25hp) from the first run just by letting the car cooldown so that the ambient temps were 20'c rather than 50'c when it arrived which just shows how poor they are in static air.

Doug@MRC is really trying to convince me to get the Marston I/C's for their much better flow (my KWE's are slightly laggier in comparison too) and better thermals etc yet I'm still struggling with the £3200+ price however Doug mentioned that Christer (RS246 Member), who has an almost identical spec to mine but with Marstons, made over 70hp more than my current figure, had more torque, less lag, more revs (7k vs 6.5k) and better intake temps all from them. I'm next back in the UK around January so I may eventually bite the built and get a set (through gritted teeth admittedly).

Edited by IanH755 on Wednesday 18th July 13:48

[giblet]

£3200 for an IC? Jeez! Impressive figures but clearly requires deep pockets.

[snoopy25]

Glad to finally see this car back on the road!

[Heaveho]

£3200 is a scary sum, but, if nothing else, lower intake temps are worth having, just to help the engine hang together. If you add up what you've spent, it's worth spending that to help protect the investment. If you can monitor temps, so much the better.

I went through 4 different brands of intercoolers to end up with something worth having, and monitor the effects at the throttle body and intake manifold. Eye opening on occasion, especially in the recent heatwave.

[IanH755]

The annoying thing is I'd buy them in a heartbeat if they were closer to what I considered a more "reasonable" price, because they are awesome, but as a tight semi-Northerner it just makes my skin itch paying that much - which is again ridiculous when you consider what I've already spent

[samoht]

Is the cost partly because it's not just one huge core slung across the front of the car, but two units squeezed into relatively small spaces? Where do the ICs go on an RS6, anyway?

[IanH755]

The two IC's fit just in front of each front wheel with an auxiliary coolant radiator sat behind them, like this -



The main cost is the two new larger cores which are absolutely fantastic. These are made by an aerospace company called HS Marstons and cost around £2200. Then Radtek (the company actually selling the IC's) take these cores and your old IC's, chop the ends off your old IC's and modify them to fit the new larger cores.

How much actual "work" is carried out by Radtek during the modification is unknown to me but, as they add an additional £1000 to the price of the cores, I'm guessing it must be extensive.

[xjay1337]

I know Radtek make some very good cores for 2.0 TFSI cars in our tuning circles.

But £3200 is ridiculous

I'm sure you could have gotten a cheap chinese cooler for £100 odd in the correct size and then have Radtek do their work on that.

[chuntington101]

Ian already has probably the best, bar the really expensive cores, intercoolers on the car. These are just even better.

Ian, are the aux rads really needed? Just thinking that they will restric some of the airflow and can't be helping matters. Maybe a larger main rad?

[Uniconst]

Hi Ian, I’ve just read your whole blog with great interest and enjoyment (NOT regarding the damage bit I hasten to add!). As far as I can tell your car was mostly like mine is now and then you spent another £15K+ (pre-rebuild) to finally end up with another 130PS and 30ishNm (albeit across a much wider Rev band). So my question is :- was it really worth it? My car regularly scares the st out of me and I can’t remember ever either being overtaken or out dragged when I didn’t want to be and I run out of bottle way before the car’s theoretical 200+mph top speed. Lol

[IanH755]

Uniconst said:

So my question is :- was it really worth it?

Yes and No really - Economically it makes no sense what so ever as a Stage 2 map like yours is the perfect blend of power vs cost, but as with all my "fast" cars I've never been able to stick to whats best vs the cost and if I'm not pushing the limits I get bored quickly. For example, one of my previous cars was a RB26 engine from a R33GTR swapped into my R34 GTT Skyline and it was the first ever to be done in the UK which again took excess time and money pushing the performance vs cost well out. However, while I'm lucky enough to be in a position where the economic limits aren't too much of an issue I'll keep pushing and pushing until my needs change, that's just who I am.

Regarding the performance, the 130ps and 30nm difference you mentioned are peak figures, however if you look at the gap throughout the rev range thats where the difference becomes apparent. For example both the Stage 2 and my 900+ car figures are are fairly close until 5000rpm, which is where the Stage 2's OEM turbos run out of steam and power levels off and torque rapidly drops. With mine however the power keeps climbing and torque is able to hold steady until near redline, due to the bigger turbos, so at 6250rpm mine has 170ps and 200nm more than a Stage 2, which is a huge amount over a Stage 2 car, which is already ridiculously quick.

How that "feels" when driving is, to me, like this - remember that first difference you felt jumping into your stage 2 car after being OEM, well 900+ feels like that same jump of "Holy Poop" all over again above a Stage 2 map and for me, that feeling justifies the cost, but that's just me and I can't say it'd be the same for anyone else.

(edited for awful spelling/grammar)

Edited by IanH755 on Saturday 4th August 19:59

[Uniconst]

Hi Ian, thanks for that. So I guess there’s no alternative but to save up another £15-£20k then! Actually on a different note, I’ve just had one of those Hydrogen Fuel Cell engine carbon cleans done and the bloke said - “ you probably won’t notice the difference with such a powerful engine”. Well, bloody hell, I’d swear I’ve got an extra 50-60 bhp! I put my foot in at about 40 in normal full auto and all 4 wheels screamed and the in-car nanny system went completely on the fritz. It really was so much quicker. 90 odd thousand miles and I recon that it has never been cleaned. Fuel consumption improved by 3 - 5 mpg for sure and all for £100 and half an hour. Blokes called The Carbon Clinic. Can’t recommend him highly enough. Going to get it done annually I think.

[xjay1337]

Uniconst said:

Hi Ian, thanks for that. So I guess there’s no alternative but to save up another £15-£20k then! Actually on a different note, I’ve just had one of those Hydrogen Fuel Cell engine carbon cleans done and the bloke said - “ you probably won’t notice the difference with such a powerful engine”. Well, bloody hell, I’d swear I’ve got an extra 50-60 bhp! I put my foot in at about 40 in normal full auto and all 4 wheels screamed and the in-car nanny system went completely on the fritz. It really was so much quicker. 90 odd thousand miles and I recon that it has never been cleaned. Fuel consumption improved by 3 - 5 mpg for sure and all for £100 and half an hour. Blokes called The Carbon Clinic. Can’t recommend him highly enough. Going to get it done annually I think.

Well bloody hell.

That snake oil stuff worked!?

Not.

[thebraketester]

The only thing that cleaned was your wallet.... out of 100 bangers.

[IanH755]

Carbon Cleaning - Originally posted after the 900hp conversion and at 96K miles on the engine but long story short, the TFSI engine doesn't really carbon up enough to make a noticeable difference unless the car has only ever been drivemn around town without ever using full throttle

IanH755 said:

Whilst it was MRC being tuned I also took the opportunity to have a bunch of other small jobs sorted.

Engine Carbon Clean- whilst I know that the TFSI engine suffers much less from carbon fouling than our poor B7 brethren, as mine had done 96k miles and never been touched I thought it'd be interesting to see how bad it was and get it cleaned. Turns out that there was some carbon there but nowhere near the levels that the B7 boys get so even if you're approaching 100k miles it's not a necessity to get it cleaned, however I still got it cleaned off anyway - Hmmmmm Shiney!!!!

[Uniconst]

xjay1337 said:

Well bloody hell.

That snake oil stuff worked!?

Not.

Wise words indeed, I guess you own an RS6 and you’ve tried this “snake oil” and it didn’t work? And of course all the black crap that came out of the exhaust during the process is normal exhaust emissions? And let’s not forget the strange affect that is had on my onboard computers calibration. Such insight and knowledge, I’m jealous

Not

[xjay1337]

Uniconst said:

Wise words indeed, I guess you own an RS6 and you’ve tried this “snake oil” and it didn’t work? And of course all the black crap that came out of the exhaust during the process is normal exhaust emissions? And let’s not forget the strange affect that is had on my onboard computers calibration. Such insight and knowledge, I’m jealous

Not

Placebo effect bud?

I have seen enough cars in my time to know that hydrogen cleaning / terraclean type things ARE a complete waste of money.

Onboard computers are also not accurate.

I don't mean to attack, and I am not coming across like that. I'm just saying that honestly these things do not work if you look into the scientific side and don't get suckered in by the advertising.