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Report: C2S Cab PDK 24-hour test

spyderman

Active member
Member
The invitation to borrow a 997 for a 24-hour extended test drive came in a letter from Porsche GB headquarters in Reading. Well - you're hardly like to say "oh, I don't think I'll bother", are you?! Having never driven a 911 of any flavour before, it was interested to find out what all the fuss was about and how much different it would feel over my 2004 Boxster S.

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I visit Porsche Centre Silverstone quite regularly, not just because its where my Boxster came from, but also because its the regular meeting venue for Region 10 of PCGB. A phone call from salesman Mark McLoughlin to arrange a date to borrow a model from the very latest generation of 911 came in late September and by conicidence I'd already booked a day's leave from work to recover from the excellent Boxster Register gathering at Belvoir Castle, Leicestershire the day before. What better way to conclude a weekend of Porsche driving than to spend a work day playing with a new 911?

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The car Mark arranged for me was a Carrera white C2S Cabriolet, with the PDK gearbox and a set of 19" Carrera Sport wheels in optional Bassault Black finish, nicely offset by the full colour centre crests. I'm not a fan of black wheels myself, but they seem to be getting more popular at the moment.

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In comparison to the PDK-equiped Cayman S I borrowed a few months back, Sport Chrono in first-stage "Sport" mode turned out to be a vast improvement on the standard "economy" mode where the gearbox programming is aimed squarely at reducing fuel consumption at the expense of performance. However, even in plain "Sport" I still found the system reluctant to "kick down" to a lower gear - perhaps there is simply so much grunt available from the 3.8 litre DFI engine, it wasn't deemed necessary? I didn't really try Sport Plus as I know it allows the revs to build to a very high level before changing.

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As has been mentioned by some other owners, I too experienced a strange hesitation from the PDK system at low speed, in reverse gear as well as in 'D', almost as if the gearbox is questioning your desire to actually move! I even had an incidence of "kangaroo petrol" while accellerating from traffic lights in Towcester - that must have been entertaining for the Audi driver behind me.

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Activation of either of the Sports modes that you get as part of the Sport Chrono package also results in the activation of the firmer settings of the active suspension system PASM, a feature I always immediately deactivated since our roads are just too rough to make an acceptable ride. That ride was, I think, a little harsher than a Cayman with 19" wheels, but there was absolutely no impression of flexing in the cabriolet body - it did feel immensely sturdy and balanced on the road.

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Despite the fairly chilly weather, I thought I should check what the car was like with the roof down. Wind noise and a distinct chill to the neck were noticeably worse than on the Boxster (no wind deflector) - all the better, I guess, to feel the benefit of the heated seats! Similar to the Boxster, the rearwards view is very extremely limited with the roof up.

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You do notice the relative lack of storage space - I quickly found that someone had left an engine in the rear boot, and a good part of the front boot is taken up by - something. I though it was only the 4WD models that had such a reduced space. Folding down the tiny rear seats is an option, though, although I'd be concerned about marking the interior with luggage, etc. Those rear seats should be considered as for kiddies only - getting even a small adult in and out of the back proved a bit of a trial.

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Talking of seats, the car had electrically adjustable (memory) version of Standard seats. The memory function threw me because every time the key got near to it, they would adjust to one of the memory positions and I'd have to reset it again - I didn't have time to read the manual to work out how to save my settings. Obviously you would have no need for the memories if you were the only driver, but its a very expensive option at nearly £1000. The seats themselves though are incredibly comfortable, more so than the Sports seats in my 986, and I reckon they would suit you better on long journeys.

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I didn't like the multi-speaker Bose audio system. Its response was very boomy and bass-heavy even after resetting the response via the new touch-screen PCM. Admittedly, the audio clarity was improved over Boxster; noticeable at speed with the roof down, I could still hear and understand traffic and news reports. Its an expensive option even on the Boxster and opinions are mixed - its an £800 option I wouldn't buy. As you would probably expect, economy is noticeably poorer than my 3.2 986 and I never managed more than 22mpg as reported by the Trip section of the PCM sytem.

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I can understand some owners comments that it makes the drive feel more isolated from the road, less engaging than for example a 993 because of the wonders of modern traction and suspension management systems. My overall impression is that the car is extremely easy and comfortable to drive - most certainly capable of daily use without causing stress or discomfort - providing you keep the PASM's Sport mode for track use. As a long distance cruiser, it would be superb.

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Options fitted:
PDK with Sport Chrono Package Plus
Heated and ventilated Memory standard seats
PCM 3 with satellite navigation module and Bluetooth phone prep
Bose surround audio system with Universal audio interface
Multi-function PDK steering wheel
Black-painted 19" Carrera Sport wheels
Park assist
Body-coloured centre console and parts of the dash

The complete package tops out when new at a not inconsiderable £87500.

My thanks to Mark McLoughlin at OPC Silverstone.
 
ORIGINAL: spyderman



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You do notice the relative lack of storage space - .....a good part of the front boot is taken up by - something.

Isn't that the wind deflector you didn't have?

I got one of these invites... Haven't had 5 min to arrange anything though [&o]
 
Well, as you can see, I actually own a C2S PDK Cab! In fact more than one[:D] Thus I have driven it just a little longer than for one whole day!

Personally I don't agree with all that Chris says. For example, with the wind deflector in place (something Chris seemed unable to achieve), there is absolutely no draft in the cockpit below 100 mph. Moreover, Chris, removal of the wind deflector (that is the thing that prevents wind on your neck [:D]) actually ensures that the front boot is just the same size as a Boxster! Like your Boxster, the wind deflector can be left in place.

As for PDK, you must have had a fault with yours; my PDK is as smooth as silk. How old was your car as they have changed the software? If you read the posts about PDK you will discover that all those of us who have PDK are delighted with it, as apposed to those who have just driven up the road and back

I agree with you regarding Bose.. not worth the money.
 
Hi Chris. That's a lovely looking car - great combo with the white paint and black wheels! Nice of the OPC to loan it out too!

I'm afraid that you're far from alone on the subject of the PDK 'box. I drove a C2 with one in - admittedly only for a day (like yourself) but I came away thinking that it was a fabulous gearbox - but that it's real home is attached to a Merc S-Class 320 diesel!! Mine was smooth and effortless but why on earth you'd want one in a 911 is frankly beyond belief.[&:]
 
ORIGINAL: dereksharpuk
For example, with the wind deflector in place (something Chris seemed unable to achieve), there is absolutely no draft in the cockpit below 100 mph.
Wish they had left it fitted - perhaps they assumed I wouldn't want to put the roof down?

The car is listed on the centre's stock list as 06/09. I wouldn't in any way suggest that my experience should be taken as gospel to anyone considering buying - PDK really is something that should be experienced and prospective buyers absolutely must take a long test drive to experience it. The most valuable thing I learned is the changes that the Sport Chrono package makes to the way it operates - without it, I would certainly not buy a PDK Porsche.
 

ORIGINAL: adrian996

but that it's real home is attached to a Merc S-Class 320 diesel!! Mine was smooth and effortless but why on earth you'd want one in a 911 is frankly beyond belief.[&:]

Oh dear, such misconception [:D] The excellent auto box in a Merc is just that, an auto box! It is a totally different animal! It has a fluid flywheel. The PDK is a manual box with an electronic clutch. You can hold it in any gear you want. You can change gear with the gear lever (or those steering wheel buttons). It is more efficient than an old fashioned manual and much more efficient than any old fashioned auto such as fitted to a Merc.

Why do you think all the latest Ferraris are fitted with twin clutch manuals, but no pedal? Are they Merc Diesels?

You asked why you would want one.

Because each and every PDK owner is totally satisfied.
Because it is more efficient.
Because you can change gear when YOU want.
Because it is faster than a old fashioned manual.
Because on track you can leave the gear changes to the computer and concentrate on line and braking points; if you wish; if you are a mere mortal.
Because you can select what gear you wish and hold it there.
Because, in traffic, when you are tired, you can give up and delegate gear changes to a computer. But only if you want.
Because it changes gear much faster than I can, even faster than Schumaker!
Because it will always select the perfect gear, if you let it.
Because it will always allow you to select the wrong gear if you allow it (apart from any situation which would induce a engine stall or over rev).
Because it will change gear 3 - 4 times whilst accelerating round a roundabout; without any loss of balance, thus ensuring the car is in exactly the right gear for the engine rpm. Can you do that? I certainly cannot.

I bet you would change your mind if you drove a PDK car for more than just a 100 miles.
 
Jeeeesssuuuss!! Here we go again! Handbags at bloody dawn again!!

Derek. Are you familiar with the expression: "Methinks [he] dost protest too much"?
 
ORIGINAL: dereksharpuk
Because it will always allow you to select the wrong gear if you allow it (apart from any situation which would induce a engine stall or over rev).
I wondered about that - but didn't fancy putting it to the test. Maybe at Silverstone on the 10th...?

Because it will change gear 3 - 4 times whilst accelerating round a roundabout; without any loss of balance...
Wondered about that too when I found it changing gear as I went around some of MK's larger roundabouts. From what little driver training I have had to date (CAT, Millbrook), I know its important to keep the chassis stable and that changing gear mid-corner is a no-no. Just how intelligent is the PDK software, I wonder? Does it work entirely on engine and road speed and throttle input, or does it also consider steering angle, suspension loads, etc. so that it knows what the car is doing at the time?

Perhaps Porsche GB could arrange a series of lectures where PDK and some of the other high-tech features of the 997 could be explained - to sad anoraks like us?!
 
Methinks the same stuff keeps being said over and over...............We like it, you don't, hey ho! It really isn't that important chaps! [:)]
 
I know its important to keep the chassis stable and that changing gear mid-corner is a no-no. Just how intelligent is the PDK software, I wonder? Does it work entirely on engine and road speed and throttle input, or does it also consider steering angle, suspension loads, etc.

No. And there in lays the problem with the PDK 'box. As I'm sure you're aware, you choose your gear before you enter any corner and accelerate out of it when you know that any variations in drive and torque will not send the arse end of the car sideways. The PDK box has a "seamless" change and, as such, the drive to the wheels will remain constant(ish) and (hopefully) prevent any such shenanigans. What it does do though is inevitably alter the RPM of the engine - which unfortunately is in the back of the car and is a boxer engine which can accentuate sideways G-forces. Thankfully, all the stability control magic will then step in and prevent you from joining Kate Humble in the bushes! Damn that stability control!![:D]
 
agree absolutely!
it does,however , seem that most of the detractors of pdk havent actually got one!!!
as derek correctly points out-it does take a little time to appreciate(IMO)-but when you do it is definately NOT to be compared to a merc auto -do it all for me-box while i waft along!!!altogether different animal and a LOT of fun
 
ORIGINAL: adrian996

The PDK box has a "seamless" change and, as such, the drive to the wheels will remain constant(ish) and (hopefully) prevent any such shenanigans. What it does do though is inevitably alter the RPM of the engine - which unfortunately is in the back of the car and is a boxer engine which can accentuate sideways G-forces.
Er.. no it doesn't. It senses lateral forces and won't change gear in corners - unless you select it manually or reach the rev limit. But then again you didn't have time to read the owner's manual so I'll let you off that one![;)]
 
Blimey.

Some people like to push a stick around a box and that gives them some pleasure (me included) as archaic as it is.

For those that can't be bothered, PDK is one of the best systems around. I used to own 2 tiptronic Porsches and liked them very much. PDK is leagues ahead.

Each to their own, both have their merits.
 

ORIGINAL: spyderman

Because it will change gear 3 - 4 times whilst accelerating round a roundabout; without any loss of balance...
Wondered about that too when I found it changing gear as I went around some of MK's larger roundabouts. From what little driver training I have had to date (CAT, Millbrook), I know its important to keep the chassis stable and that changing gear mid-corner is a no-no.

Good point. Changing gear manually half way round a corner is not a good idea because there is a loss of power whilst the clutch is depressed. That unbalances the car. I have tried it!

But the whole point of PDK is that gear changes are seamless; no loss of power. Hence no inbalance. I have tried it [:D]
 

ORIGINAL: tscaptain

ORIGINAL: adrian996

The PDK box has a "seamless" change and, as such, the drive to the wheels will remain constant(ish) and (hopefully) prevent any such shenanigans. What it does do though is inevitably alter the RPM of the engine - which unfortunately is in the back of the car and is a boxer engine which can accentuate sideways G-forces.
Er.. no it doesn't.  It senses lateral forces and won't change gear in corners - unless you select it manually or reach the rev limit.  But then again you didn't have time to read the owner's manual so I'll let you off that one![;)]

Funny, mine does change gear round a roundabout........
 
Repsonse to the OP.

Sounds to me like that was a none event of a test drive and all it did was too prove a preconceived opinion that you dont like PDK or the 911 and that your Boxster is a better car...(it may well be and it's a lovely car)

To not use the full sport plus setting on the PDK box is a mistake (why not as that's when it really shines) and PASM sports mode is not harsh I drive my car everyday with it on.

The space inside a 911 for storage etc is excellent for the type of car it is and far better than its rivals IMHO why you would complain about that I have no idea.

I have a short shift manual (as a prefer it to the PDK) however the PDK is a superb piece of engineering and enables seemless gear shifts with no loss of momentum (So yes you can change gear whilst going round a corner) that's the beauty of the system it doesn't upset the balance of the car.

Each to his own I guess...
 
ORIGINAL: Wills
Sounds to me like that was a none event of a test drive and all it did was too prove a preconceived opinion that you dont like PDK or the 911 and that your Boxster is a better car...(it may well be and it's a lovely car)
Well, I sure as hell am not going to let that go without a response. Did you actually read my review? All of it? Go and read my last paragraph again.

I had no preconceptions about the 911 as I'd never driven one of any flavour. I had tried PDK before, in a Cayman, and wasn't happy with its response in normal (what I refer to as "economy") mode. I was very interested in how Sport Chrono changed its response - its a significant improvement and I still think its a fantastic gearbox.

If the test drive for me was a non-event, I wouldn't have taken the two hours or so it took me to edit the photos and put together the article. On the contrary, it was a marvellous opportunity to discover just how brilliant the modern 911 is. BMW's tag line is (or was) "the ultimate driving machine" - I don't think so.

 

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