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Dippy's S5

Dippy Jan 25, 2017

  1. Dippy

    Dippy Well-Known Member Team Monsoon Audi S5 Black Edition

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    A bit late but now that I am planning a stage 2 tune I thought I'd start a "build thread" like others have done.

    I guess the story of my S5 sportback actually starts with my S4 avant ownership. I personally imported a brand new B5 S4 in 2001. Two years later I took it off to AmD (who were near Bicester at the time) for what I guess would have been termed a stage 2 on account of the remap with full Milltek exhaust. It also got an APR bi-pipe, short-shifter, H&R coilovers, Porsche front brakes and a drivetrain stabiliser bar. I changed the wheels to 18" RS4 replicas, fitted the OEM satnav plus with TV using kit I got via German e-bay and also a boost gauge with turbo timer (using the 'afterrun punp' instead of keeping the engine going) which had a heads-up display which I guess was a bit of a novelty at the time.

    B5_S4.JPG

    I loved that car which is why I kept it so long. It was not until early in 2014 that I started thinking about replacing it. Whilst I had fancied uprating the turbos to KO4s the value of the car had become so low that it was less than the stage 3 tune would cost and that fired my 'financial sense' brain cells. So I started thinking about what I would replace it with. Now one of the things I disliked about having a modified car was dealing with insurance companies. As we all do (?), every year I would check if my renewal price was competitive, but for a modified car this process can be a bit time-consuming. Hence I decided that my next car would not be modified, and so it needed to have good performance out-of-the-box. I also planned on buying used.

    I'll simplify my research. I went for a test drive of an TTRS (probably a 2012/13 model - 340PS). I loved it until I got to practicalities. I have two teenage daughters and so my car has to do taxi duties. In my naivety I thought that the rear seats of an TTRS can be used. So that killed that idea :( Next I went for a test drive of a 2009 Nissan GT-R (unmodified). I found that if I put the driver's seat forward I could sit in the back with just enough legroom. I could then get back in the driver's seat and, although the seat was more forward then I'd like, I could put up with it during taxi duties. But I still had concerns about price (around £40K at the time and then there's the servicing costs) and the fact that IMO the GT-R is really a track car and not a road car. I discussed my concerns on the GT-R forum. The members there are great and they did not try to persuade me to get one. In fact they generally agreed that my concerns were genuine. And then one fine member suggested "if you like Audis, why don't you get a B8 S4 and modify it to stage 2 - this will be near the same performance as an unmodified 2009/10 GT-R".

    So I started with what turned out to be quite a lot of test drives of S4s and S5s. Coming from a B5 I was very impressed by the interior of the B8. And considering that my S4 had around 320PS but a whopping 56oNm at peak, I was concerned that the stock B8s with their 440Nm would not impress. But it was the opposite. As I have written many times before, to me the broad torque curve of the supercharged engine coupled with the fantastic s-tronic gearbox was just a better experience. Yes I noticed the lack of a torque "punch" compared to my B5, but this was more than compensated for by the usability of torque not only at the top end, but especially at the bottom end. Suddenly 13 years of living with turbo lag became a problem.

    Well those numerous test drives showed me that not only did I want a B8.5, but that I really wanted an S5 sportback and with a lot of options. So for about 6 months I searched hard for a used one which would meet my exact spec. I gave up. I had been planning to buy a used car somewhere in the £30Ks, and had ended up looking at some of the nearly new ones in the £40Ks. Then I noticed comments on forums about Carwow, Orange wheels etc and put in some requests. Suddenly the idea of buying a brand new S5 sportback to my exact specification seemed viable. So at the end of 2014 my order went in to Audi Hitchin.

    In April 2015 I took the train up to Hitchin to PDI my new S5.

    Predelivery1.JPG

    Then a few days later I returned to collect.

    Collection4.JPG

    And thanks to the members of forums such as this I had seen the sense of getting paint protection done by a professional detailer, so shortly afterwards it got a full Gtechniq treatment.

    Postdetail2.JPG

    Ownership of my new S5 sportback was a joy (except for the worry about where to park it) and any doubts I had about moving from the modified B5 were quickly dispelled. I installed a dashcam as detailed here, but planned to live with the car as stock for a year. I had modified my S4 after 2 years because as a personal import I only got the 2 years manufacturer warranty. However nothing went wrong on that car for at least 5 years so I reasoned that maybe I could risk my warranty on the S5 (which I had bought near the end of the B8.5 production run, as I had done for the B5 S4, validating the theory that Audi does fix the major flaws in the end). But it made sense to wait a year.

    Whilst I had been searching for a suitable used S5 I was aware of the fact that the SIMOS 8.5 used in the B8.5 had not yet been cracked, but I was confident that it would be. Indeed by the time I took delivery of my new S5 it had been. But at the time I had not realised that the new engine cover on my S5 was hiding more secrets below. It got me interested so I started to look for as much information as I could find. I saw that the engine was the new CREC code, and Audi had started production of it around May 2014. It soon became clear that this new engine also had a new ECU - the SIMOS 16 - and that it had not been cracked yet. No worries - surely it will be cracked by early 2016 when I wanted to get mine tuned?

    No.

    Time for service came and I decided to have a used oil analysis done shortly before. I posted the results here, and plan to get another one done this year. The service was an oil change and inspection, done at Audi Basingstoke. No problems apart from my fear that someone would damage the wheels (yes I took photos before and after just to be sure). I sat near the big window into the workshop trying to appear that I was not constantly spying on the tech doing his work :)

    The rest of 2016 progressed with mixed feelings: Whilst I continued to enjoy S5 ownership, I felt totally frustrated that I couldn't get a tune. Like others I started to lose confidence that we would ever get a CREC tune, especially as the B9 loomed. Then late in 2016 there was news, like mana from heaven, that the SIMOS 16 had been cracked. The first tuner to announce was Unicorn, and then later Celtic. But I wanted to wait for MRC. It looked like I'd have to wait until 2017, but then on Christmas eve MRC posted on Facebook. Finally!

    However notwithstanding the Christmas break, I couldn't get my S5 tuned immediately. Since I had to wait a long time until the SIMOS 16 was cracked, I had plently of time to read about tuning the 3.0 supercharged engine. Now most tuners do a stage 2 by reducing the size of the supercharger pulley so that it spins faster. MRC don't, they use a bigger crank pulley instead. There are pros and cons for each method. However over in the US, not only is there a lot of interest and practice of using a bigger crank pulley in addition to using a smaller supercharger pulley ("dual pulley") to spin the charger even more, but it has also become apparent that there is a weak part of this engine - the OEM crank pulley. As for most engines, Audi use a damper pulley in order to absorb resonant vibrations in the crankshaft. The OEM pulley employs an elastomer ("rubber") to do this, probably because it is the cheapest method. But the elastomer can fail and there have been cases of it doing so, and not just on tuned cars. Of course one solution is to use a single piece/solid pulley which can't fail, but it also can't dampen vibrations.

    Now whilst I would have been happy to get my tune done using a single piece/solid pulley, something else happened during my wait for the SIMOS 16 ECU to be cracked. As well as other brands of aftermarket dampened pulley available, there is one branded Fluidampr. It is a popular replacement for OEM pulleys, including on the 2.7 biturbo engine that my B5 S4 had (and I can add that the OEM pulley on my B5 did not fail after 14 years so it makes me wonder if the one used in the B8 and B8.5 is not as good!). However there was no oversize Fluidampr for the supercharged engine. So a company called iABED in Canada came up with the vdamper kit (see here). Fortunately I can afford this rather expensive kit so even though there is no evidence that using a single piece/solid pulley can cause problems, I decided that I'd buy one. It arrived this week.

    vdamper1.JPG vdamper2.JPG vdamper3.JPG

    Now I'm booked into MRC next month and I have my insurance cover sorted. Finally my original purchase decision for an S5 will be realised...
     
    Last edited: Jan 25, 2017
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  3. DrEskimo

    DrEskimo Well-Known Member

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    Sort of pieced your history over the year reading your posts, but impressive when you put it all together!

    Look forward to seeing your progress with modding the S5....although not as I will be jealous....!
     
  4. arad85

    arad85 Well-Known Member Team V6 Audi S5 Black Edition

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    Nice. What diameter is the Fluidampr you have and did you get stung with import duty?
     
  5. Dippy

    Dippy Well-Known Member Team Monsoon Audi S5 Black Edition

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    @ MRC tomorrow :)
     
  6. arad85

    arad85 Well-Known Member Team V6 Audi S5 Black Edition

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    Looking forward to the results...
     
  7. Dippy

    Dippy Well-Known Member Team Monsoon Audi S5 Black Edition

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    I'm hoping there are no problems - but this is the first time that a Vdamper has been fitted to a CREC engine. Doug thinks he'll need the car in service mode....

    ...or maybe not. Doug has just removed my crank pulley from underneath and is about to try fitting the Fluidampr first. Maybe he can then find the space to attach the overdrive pulley.
     
    Last edited: Feb 23, 2017
  8. Dippy

    Dippy Well-Known Member Team Monsoon Audi S5 Black Edition

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    That's a relief. Doug just told me the pulley went on OK (a bit tight for space), the road test was fine and my car made about 340PS on the RR. Now Mihnea is doing his magic.... :)
     
  9. arad85

    arad85 Well-Known Member Team V6 Audi S5 Black Edition

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    .... and ...
     
  10. Dippy

    Dippy Well-Known Member Team Monsoon Audi S5 Black Edition

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    Sorry, I didn't get time to update yesterday.

    What with the windy weather and the ridiculous level of traffic on the way home I didn't get a good chance to fully experience the stage 2 package. I'll do a more detailed update in a few days after I have had the chance to properly drive it. However on the few occasions I got the chance for a quick blast I was very impressed. I am glad that I am fully used to the handling of my S5 (unlike the first 6 months or even a year of ownership) because the extra power makes it shift like crazy. I'm glad that I added the sports diff to the quattro (and I'm also glad that I didn't buy a RWD BMW).

    Doug told me that the drive ratio from my vdamper is slightly different from using their same size pulley (possibly unsurprising given manufacturing tolerances), although he didn't say which way. However my results seem consistent with other CREC engines with the MRC pulley. My peak power was 475bhp and the peak torque was 585Nm. The stock figures (which MRC measure with the oversize pulley but the extra boost is bled) were 337bhp and 471Nm. The OEM air filter was still fairly clean, but the car has only done just over 8000 miles from new.

    MRCintake.JPG vdamper4.JPG OEMairfilter.JPG OEMpulley.JPG
     
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  11. arad85

    arad85 Well-Known Member Team V6 Audi S5 Black Edition

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    Excellent - nice figures too. Know what you mean about the handling. Just starting to feel confident with being more aggressive with mine. Problem is not being too aggressive with other traffic there (I'm sure there's enough people swearing at me as it is). Also not quite got the hang of more throttle on understeer with the sports diff, but I'll get there. Looking forward to a proper write up.
     
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  13. Dippy

    Dippy Well-Known Member Team Monsoon Audi S5 Black Edition

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    Is it a case that you don't feel confident to trust it? That was the case with me. I wrote off my Scooby (and nearly wrote myself off at the same time) due to lift-off oversteer. Now whilst I believe that quattro is far better than the Subaru system (and certainly on my 2015 S5 vs that 2000 WRX) my problem was that I didn't keep the power on through the turn. The sports diff can only do its work if there is torque in the system.

    It may be longer than I hoped - now I have come down with a vicious cold and driving is the last thing I want to do. :(

    One more thing. I checked with MRC about the gearbox remap and to my surprise they don't change any shift points like APR and REVO do. I suspect that I'll get the best out of my stage 2 in manual. I have been pretty lazy and relied on auto changes in dynamic mode, so I'll start using M more to get used to it. Next time I "meet" something such as an RS4 or an M3 I don't want to be embarrassed because my gearbox is changing up too soon.
     
  14. arad85

    arad85 Well-Known Member Team V6 Audi S5 Black Edition

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    Yup - mainly going quick on roundabouts. I know I have to keep my foot there, but...


    Yuk. Hope you feel better soon!

    So the gearbox shifts up at approx 6k rpm then? That seems a tad silly given you have power all the way up the rev range... Or am I missing what you mean?
     
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  15. xpoweruk

    xpoweruk S4 B8 Smile Machine Team Ibis saloon Audi S4 quattro

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    Plenty of torque now Dippy.Gearbox map is a different approach,so you can only hit 7K in manual mode
     
  16. Dippy

    Dippy Well-Known Member Team Monsoon Audi S5 Black Edition

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    So, feeling a lot better I planned to go for a joyride today. However first I wanted to get a VCDS autoscan. I do these on a frequent basis to check for problems and certainly will continue to do so now that the car is modified. Now strangely, although I went to do this specifically because I had been to MRC for remaps, I guess my brain went into 'autopilot' as I did it, and so wasn't expecting to see anything significant. So I had a small panic attack when I hooked up VCDS and saw that 22 of the 31 modules was in malfunction or reporting errors! There were a total of 60 DTCs! Calming down I went through them all and they were all generated at the time of the remapping and as far as I could tell were consistent with loss of communication with the ECU. I cleared the DTCs and none returned. I'll do my next periodic check fairly soon just to be sure...

    For those interested in the visibility of remapping, I can report that the ECU data changed from "3.0l V6 TFSI H10 0004" to "3.0l V6 TFSI H10 0005". H10 is the revision code but I don't know what the 0004 is and whether or not the change to 0005 indicates the remap. The workshop code has not changed. There are no changes at all for the TCU.

    So with that done out I went, and it immediately started to rain - hard. Undeterred I kept going.

    The first thing I noticed is that even in D the increase in torque is damn obvious. I'll have to be careful not to press too hard on the accelerator when traffic is about because my car can seriously lurch forward if I do. Then I noticed the noise. The air intake changes have certainly made the supercharger louder, but this was only noticeable when I was in ADS individual since I have the engine sound set to comfort. In dynamic the "structure borne sound (J869)" drowns it out.

    Out on the open road I unleashed the power and certainly it is a very noticeable change over stock. It's a while ago for my memory now, but that original advice I got that a stage 2 B8 is similar performance to an unmodified 2009/2010 Nissan GT-R seems to holds true. And that is based on freshly wet roads so I wasn't prepared to really put my foot down.

    I was lucky that my chosen open road near where I live was empty of traffic so I was able to do a few standing start sprints. Again since it was so wet I didn't push hard but it revealed just how different a stage 2 is over stock. I'll have to try again sometime when the road is dry. Anyway apart from being impressed, I confirmed that in M there are auto upshifts at the new redline (which seems to be somewhere around or just above 7000 rpm). However in S the upshifts were down at 5000 to 5500 rpm and this seriously made the car feel held back. I have checked with MRC about this and they suggest that it was because I was not using full throttle, and that if I do so the ECU should upshift at the redline. Although the car seemed to handle these blasts in the wet well (as it should do!) I wasn't confident to do so, especially since the TC was activating. So this is something for me to check again in the dry.

    Anyway, conclusion so far is that my stage 2 is very much what I expected and well worth the investment. Nevertheless I think I shall get used to it...
     
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  17. Dippy

    Dippy Well-Known Member Team Monsoon Audi S5 Black Edition

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    I also had a look at my OEM crank pulley. I could see the 'rubber' dampening material quite easily and of course it looked fine. Although by using only hand pressure I could sense no 'give' at all between the two metal parts, when I prodded the visible rubber with a small screwdriver it depressed quite easily showing that it is relatively soft. It certainly makes me feel that just like other plastic based materials used in things like boots and belts, this rubber is bound to deteriorate over time.
     
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  18. arad85

    arad85 Well-Known Member Team V6 Audi S5 Black Edition

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    Nice write up Dippy :) Will be interested to see if flooring it makes the shift points jump. Have noticed that on a complete stock S5, if you are accelerating hard but aren't to the metal, shifting is more gentle, so there maybe something in that.
     
  19. Dippy

    Dippy Well-Known Member Team Monsoon Audi S5 Black Edition

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    So @arad85, with your interest, do you have plans for your S5?
     
  20. arad85

    arad85 Well-Known Member Team V6 Audi S5 Black Edition

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    @Dippy : Yes, but it's only 9 months old so I am thinking of squeezing a few more (not sure if that's likely to be 2 or 22 at the moment) months out of the warranty before I get it done. Unsure of whether to go for stage 2 or not - ease of getting insurance will be the decider. If I'm down to a single insurer (as I appeared to pick up from a thread on here or A5OC) I might just go with stage 1 + gearbox map. Don't like the idea of only a handful of insurers be willing to insure - not only does it reduce competition, it means it will possibly be withdrawn in the future which might mean I have an uninsurable (or at least uneconomically insurable) car. My own insurer (LV) are ok with a remap and gearbox change, but no supercharger changes.

    Also thinking about AWE touring, even though the (very expensive) Capristo sounds fab. Whilst money isn't necessarily an issue, just haven't got my head around the value aspect.
     
  21. Dippy

    Dippy Well-Known Member Team Monsoon Audi S5 Black Edition

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    I know what you mean about insurance but for the last 15 years I have insured a modified car and not had a problem finding an underwriter. I think the chances of being left without any insurance options at all are very low. How much it costs on the other hand, is indeed a big issue.

    I confirmed last night that at full throttle in S my car does shift at around 7000rpm. I also had major smiles on my face after passing through the multiple traffic lights at a big motorway junction near where I live. One thing I have always loved about the B8 in comparison to my B5 is the low down torque and the way the s-tronic works so that off-the line performance is so good. Well stage 2 is now almost unbelievable. The car literally 'leaps' off the line. Supposedly my 0-60 should now be less than 4 seconds and I can believe it! Also MRC told me that their remap has "slightly quicker gear changes" - it does feel quicker and smoother than before.
     
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  22. arad85

    arad85 Well-Known Member Team V6 Audi S5 Black Edition

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    WILL YOU STOP IT..... (BTW, I love traffic lighted m/way junctions - I have two on my way home which I need to go around ;))
     
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  23. scotty76

    scotty76 Well-Known Member Team Phantom Audi S4

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  24. DrEskimo

    DrEskimo Well-Known Member

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    Whilst I haven't driven one, I've sat in Jamins and I can only imagine how happy you are Dippy....!

    It really turns it into a different animal...

    (Sorry arad....!)
     
  25. arad85

    arad85 Well-Known Member Team V6 Audi S5 Black Edition

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    It will happen... It's just a question of when ;)
     
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  26. Dippy

    Dippy Well-Known Member Team Monsoon Audi S5 Black Edition

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    Yup :)

    Indeed. Have you heard of the honey badger? I'm looking forward to 'meeting' my first B9 on the road...
     
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  27. Dippy

    Dippy Well-Known Member Team Monsoon Audi S5 Black Edition

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    What I didn't mention above was that I originally bought my B5 with the intention of tuning it. Although I had tuned cars before then, this was the first brand new car I wanted to tune, and so indeed affect on warranty was a concern to me. I had some confidence since by 2001 the B5 was coming to the end of its run (mine was one of the last few made), but nevertheless I waited until the warranty expired before tuning it (as a personal import it only had 2 years warranty). However it was many years before anything went wrong with the car, and nothing went wrong which would have had a warranty claim invalidated by the tune (although possibly I would have been forced to argue with Audi that an engine tune should not invalidate a warranty claim for the failure of the windscreen wiper mechanism for example).

    So when it came to the B8.5, which as I already stated I again purchased with the intention of tuning, I could be objective based on my experience with the B5. Again I purchased near the end of the production run when most of the problems should be fixed. As you likely know the biggest risk is the DL501, but having researched that extensively I have confidence that the later gearboxes are as good as they can get. So this time round I was prepared to have it tuned within the warranty period. I'm not sure that I would have done it at less than 12 months, but of course I didn't have the option anyway. I've had mine tuned 22 months into the warranty but would certainly have been happy to do so at 12.
     
  28. arad85

    arad85 Well-Known Member Team V6 Audi S5 Black Edition

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    Yup... I'm totally with your thinking there (and was also one of the reasons I took the B8.5). The closer to the end of the warranty, the less I'm likely to "worry" about it. Just not sure when that line is crossed for me... When it does get crossed, it will happen quickly though :D
     
  29. Dippy

    Dippy Well-Known Member Team Monsoon Audi S5 Black Edition

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    I'll need to arrange the 2nd service soon, so that will be oil change & inspection, plus new pollen filter and wheel rotation.

    However I'm not sure if its my imagination but the brake pedal seems a bit "spongey". The car's not done 9,000 miles yet, but its nearly 2 years old and IIRC I generally had my B5 brake fluid changed every 2 years. What are others' experience of B8 S4/S5 brake fluid - how often has yours needed changing?
     
  30. scotty76

    scotty76 Well-Known Member Team Phantom Audi S4

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    Hey Dippy. I think the schedule is 3 years initially then every 2 years. Pedal feel is fine on my S4. Mine is a June 2014 car.
     
  31. Dippy

    Dippy Well-Known Member Team Monsoon Audi S5 Black Edition

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    Yes I saw that. To me it doesn't quite make sense that the first brake fluid lasts longer than subsequent fills. I assume you're still on factory brake fluid then?
     
  32. scotty76

    scotty76 Well-Known Member Team Phantom Audi S4

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    Yeah I agree with your logic but I am indeed still on the factory fluid.
     
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  34. DrEskimo

    DrEskimo Well-Known Member

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    No change in brake feel for me mate.

    I am over 10k miles now, but only just over 15months old. Imagine age would have more of a bearing on brake fluid quality than mileage...(At a guess...!)?
     
  35. Bristle Hound

    Bristle Hound Moderator Staff Member Moderator MQB Platform

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    @Dippy - Great thread mate. Interesting reading :thumbs up:

    Oh & about bl00dy time too :laugh:
     
  36. Dippy

    Dippy Well-Known Member Team Monsoon Audi S5 Black Edition

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    Now either there is something different about my car or this is the first time I have noticed it in nearly 2 years of ownership...

    The "spongey" feeling in my brake pedal is only when the automatic parking brake is on. As soon as I disengage it the brake pedal firms up. Is this the same in your cars?
     
  37. SPIKE_S3

    SPIKE_S3 Well-Known Member Regional Rep Team Ara Blue Team Daytona Gold Supporter

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    Nice car and nice thread. I'll stay tuned to see it develop :respekt:
     
  38. Dippy

    Dippy Well-Known Member Team Monsoon Audi S5 Black Edition

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    Time for second service so I decided to get another engine oil sample to send for analysis. A slight accident with the syringe this time - amazing how much mess can be made with only a bit of oil :)
    I'll post the analysis soon - hoping to see less aluminium and silicon this time.
     
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  39. Dippy

    Dippy Well-Known Member Team Monsoon Audi S5 Black Edition

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    Second service done. Now that I have invalidated at least part of my warranty I am free from the need to use an official Audi stealer so I returned to the indie who did most of my B5 servicing. He's Mark at MDM Technik in Marlow, Bucks. It was great to see him again - we had a good chat about tuning and parenthood - and its great to have been able to fully relax while he was working on my car, as opposed to that worried feeling I had whilst an unknown Audi tech was working on it for the first service.

    So to contrast the two services:

    1st service at Audi Basingstoke
    Oil change & inspection
    £258.84

    2nd service at MDM Technik
    Oil change & inspection (incl. top-up washer fluid)
    Replace pollen filter (part cost £37.56)
    Replace brake fluid (fluid cost £11.00)
    Rotate wheels
    £318.00

    I'm glad I went for the brake fluid change - the pedal is a lot firmer now, making braking feel better (and it probably is better?)
     
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  40. Dippy

    Dippy Well-Known Member Team Monsoon Audi S5 Black Edition

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    UOA results in. As expected (hoped?) it's satisfactory, showing reduced levels of metals and silicon.

    Sample at 8813 miles
    DippysS5oilanaysis2.png

    Sample at 4200 miles (factory oil)
    DippysS5oilanalysis1.png
     
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  41. Dippy

    Dippy Well-Known Member Team Monsoon Audi S5 Black Edition

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    I have been driving in manual recently. Before I had the engine tuned I didn't feel like doing my own gearchanges was enough of a benefit over ADS dynamic so I didn't bother. But now it certainly is (because the MRC TCU tune hasn't changed the shift points). I have found driving in manual easier than I expected, partly because the 'box still does downshifts automatically in case I don't in time. I am finding that I get a good feel for what gear it is in without looking. Overall I have found it incredibly satisfying as well as getting better performance.
     
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  42. Tashfeen

    Tashfeen S4 - the smile per mile machine! Team Glacier TFSI Owners Group Team V6 VCDS Map User Team Scuba Supercharged Audi S4 Audi A3 Black Edition quattro

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    Interesting @Dippy. Do you think downshifting yourself helps. TBH, with the exception of when I am on motorway and want to overtake someone that I'll downshift otherwise I'll let the car do it for me. I am at a stage where if I accidentally put the car in Auto it's annoying. It doesn't excite me and/or make me feel in control.


    Sent from my iPhone using Tapatalk
     
  43. Dippy

    Dippy Well-Known Member Team Monsoon Audi S5 Black Edition

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    I think it helps so that I know which gear is selected. In the example where I'm slowing down and expecting to stop because of traffic conditions which then unexpectedly change, I don't like to get caught out in the wrong gear. From what I've seen it changes down automatically when the revs drop really low, probably to avoid stall. I don't want to get into the habit of relying on that.

    By coincidence last night I had the first 'test' of my car's performance since I had it tuned. I came home from an evening out, just before midnight. Leaving the motorway onto a multi-lane carriageway I saw the lights ahead change to green and a white car take off from the line really fast, to then slow down as the next set turned red. The car seemed to be going my way (a right turn to a set of nice open twisty B-roads back home) so I pulled up behind it at the red lights, wanting to see what it was. So I guess I was pleased to see the C63 and AMG badges on the back. I don't know my Mercs but I have since watched the video from my dashcam and have now identified it as the previous C-class coupe with the 6.2 V8 engine. I believe that engine makes 457PS and 600Nm in a smaller car so a great comparison for mine.

    Initially I didn't think I'd get the chance to compare, since the first section of road is restricted to 40mph and the car must have been doing twice that, leaving me behind (I won't speed in 40mph or less zones). However when I turned right into a derestricted section, which is rather twisty, I caught up with the AMG. Continuing on there were some straight bits where the driver put his foot down and so did I, and my car was clearly a match on performance. However in places the car pulled away for two reasons where the driver had an advantage over me: 1) He seemed to be prepared to get to silly speeds where I won't, and 2) he was prepared to use the whole road where I like to keep on the left of the line (which is there for a reason isn't it?). But I always seemed to catch up and I worked out why: The driver of that AMG seemed to be having difficulty with corners. Now I'm quite pleased with the handling of my car, it does have full ADS (and it was in dynamic). but mine is the S5 sportback which is quite heavy. That car may have a big V8 up front, but its a 2-door coupe so surely a bit lighter than mine? Nevertheless this driver was not able to take corners in his car anyway near as well as I can in my S5.

    In the end I think the driver gave up when he realised he wasn't going to lose me and started driving much more slowly (although there were a lot more corners and maybe that was why).

    However getting back to the topic, I was truly glad that I have been practising using M. Without doubt if I had been in S the 'box would have kept changing gear, and probably too high for what I wanted. So it made the journey home rather enjoyable and made me very pleased with the performance of my car. I can definitely say that it is fast enough for me :)
     
    Roadrunner146 and Tashfeen like this.

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