May 18 2009

    Porsche 911 GT3 myo 2010

    cheap cialis pill certified cialis cheap viagra in canada cialis buy drug buy generic cialis viagra buy 25mg viagra cheap viagra without prescription buy cheapest viagra on line purchase viagra cialis 10mg buying generic viagra cialis pills viagra from india cheapest sildenafil citrate cheap cialis no rx viagra india cialis bangkok viagra for order buy sildenafil internet buy generic viagra online buying cialis online where to order cialis tablet cialis find cialis no prescription required viagra cheap drug order cialis cheap online online pharmacy cialis cialis no rx order generic cialis price of cialis viagra soft drug viagra cheap viagra from uk order cialis no prescription order cheap viagra viagra drug order cheap cialis cheap cialis pharmacy best price for viagra cheap viagra from usa cost cialis cialis overnight shipping cheapest generic cialis online generic viagra online online viagra viagra sales cheap cialis in canada compare cialis prices online cialis online drug viagra online purchase discount cialis without prescription no rx viagra cialis overnight viagra uk cialis order cheap cialis from usa buying cialis cialis overnight delivery cialis in bangkok buy and purchase sildenafil online impotence treatment cheap price viagra viagra sale cheap cialis tablet drug cialis generic cialis online cheap viagra pharmacy find discount cialis online viagra malaysia cialis without a prescription buy cialis online cheap viagra rx buy no rx viagra cialis 20mg viagra in malaysia discount viagra online buy sildenafil cheap buy viagra low price buy cialis cialis cheap price cialis cheap generic viagra cialis canada low cost viagra buy cheap viagra cialis vs viagra order cialis from us cialis tablets find no rx cialis buy generic cialis online buy viagra overnight delivery cheapest cialis price buy cheapest cialis on line order cialis in canada viagra tablet viagra no online prescription find cheap cialis online viagra price order viagra no prescription cheap generic cialis buy viagra online cheap cialis uk cialis without rx generic cialis cheap viagra vs cialis order cialis on internet viagra tablets viagra purchase impotence drugs buy cialis generic cialis tablet cialis cheapest price order viagra from canada viagra generic cheap viagra from canada order cialis compare viagra prices online find cheap cialis impotence cure pfizer viagra find discount cialis cheapest cialis buy cialis from india impotence buy cheapest viagra online cialis side effects viagra order discount cialis online cialis in malaysia cialis in uk viagra in uk cialis online without prescription cialis online pharmacy order viagra buy viagra online viagra side effects cialis sale discount cialis no rx cheapest viagra find cialis order cialis no rx buy cialis low price buy viagra cheap drug cialis online purchase order discount viagra online 50 mg viagra 100 mg viagra 10mg cialis cost of cialis cheapest cialis prices buy discount viagra online cialis sales 50mg viagra cialis price buy viagra on internet cialis pill cheapest cialis online purchase viagra overnight delivery cheap cialis from canada cheapest viagra price cialis 20 mg buy sildenafil low cost order viagra without prescription buy viagra lowest price no prescription cialis order viagra on internet discount cialis overnight delivery cialis cheap drug viagra approved viagra no rx required compare viagra prices no rx cialis cheap cialis on internet buy viagra from india buy discount cialis online viagra pharmacy online order viagra from us cialis free delivery cialis for order buy cialis from canada viagra without rx viagra online review 10 mg cialis cheap viagra no rx cheapest viagra prices viagra prices cialis pharmacy order no rx cialis buy cialis in us buy cialis no prescription required order cialis from canada lowest price cialis cheap cialis internet online pharmacy viagra cheapest generic cialis generic drugs cialis india find cialis without prescription best price cialis buy viagra without prescription cheap cialis in uk where to buy viagra 20 mg cialis cheap cialis from uk buy sildenafil canada cialis no rx required cialis in us buy cialis overnight delivery cialis cheap price order cheap viagra online 20mg cialis buy cheap viagra online viagra internet viagra without prescription free cialis buy cialis us cialis buy buy viagra in canada order viagra cheap online find viagra without prescription viagra pills cheap cialis no prescription viagra online without prescription order generic viagra cialis discount viagra cheapest price purchase viagra no rx viagra no rx viagra cheap discount viagra overnight delivery sale cialis cialis pharmacy online purchase cialis without prescription pharmacy online cialis medication discount viagra buy cheap cialis impotence medication viagra medication find cialis on internet impotence pills cialis prices discount viagra without prescription cialis online cheap cialis online review find cheap viagra online buy viagra us purchase cialis online certified viagra where to order viagra buy cheapest viagra buy cialis internet order cialis online buy sildenafil online buy cialis cheap cheap viagra purchase cialis find discount viagra buy cialis on internet cialis buy online buy sildenafil online without a prescription viagra buy online order cheap cialis online viagra information no prescription viagra cost of viagra buy cialis in canada buy cialis online buy viagra cheapest generic viagra cialis us cialis australia fda approved cialis lowest price for viagra viagra bangkok cialis prescription cialis cost buy no rx cialis buy viagra internet viagra discount order viagra overnight delivery generic cialis viagra australia 25 mg viagra order viagra online viagra overnight cialis rx order cialis in us order viagra no rx order discount cialis online viagra vendors order viagra in us buy sildenafil in uk viagra us buy generic viagra viagra canada viagra no prescription viagra cheap price cheap viagra tablet viagra free delivery overnight viagra purchase viagra online find cheap viagra cialis malaysia best price viagra cialis free sample find viagra on internet cialis generic buy sildenafil in canada order cialis no prescription required cheapest viagra online purchase cialis no rx viagra in us order discount cialis cheap viagra internet free viagra cialis approved best price for cialis cialis from india find no rx viagra generic viagra viagra from canada viagra online pharmacy buy viagra from canada cheapest generic viagra online buy cheapest cialis discount cialis viagra overnight delivery cialis without prescription 100mg viagra cialis in australia price of viagra order cialis overnight delivery cheap viagra in uk buying generic cialis viagra pill buy cialis on line low cost cialis find discount viagra online buying viagra cheap cialis overnight delivery pharmacy cialis cheap viagra pill viagra prescription find viagra online buy cialis lowest price discount viagra no rx online cialis viagra free sample cheap viagra in usa find viagra cheap viagra online buy viagra no rx generic viagra cheap buy cialis without prescription buy viagra in us cheap viagra overnight delivery cheap cialis in usa cheap cialis online viagra order no rx viagra viagra soft tab find cialis online lowest price viagra cialis drug cialis vendors viagra online stores erectile dysfunction order viagra in canada buy viagra on line viagra overnight shipping viagra online cheap lowest price for cialis approved viagra pharmacy cialis 10 mg cialis no online prescription cialis purchase cialis from canada order cialis without prescription viagra for sale viagra in australia approved cialis pharmacy buy viagra generic buy sildenafil in spain find viagra no prescription required cialis no prescription buy viagra from us order viagra no prescription required cost viagra purchase viagra without prescription buy cialis no rx cialis cheap cialis internet tablet viagra cheap viagra on internet viagra cost pharmacy viagra cialis soft tab cialis information buy cheap cialis internet purchase cialis overnight delivery cheap cialis without prescription buy viagra no prescription required compare cialis prices buy cheap cialis online overnight cialis where to buy cialis cheap cialis buy cheap viagra internet buy discount cialis viagra buy drug cheap viagra no prescription buy sildenafil citrate buying viagra online buy discount viagra fda approved viagra cialis online stores cheap cialis tablets buy cheapest cialis online cheap viagra tablets order discount viagra sale viagra viagra online cialis for sale cialis soft viagra pharmacy buy cialis from us viagra without a prescription viagra in bangkok

    Driven: Porsche 911 GT3
    Tony Dron takes the wheel of the 2010 Model Year car

    The previous Porsche 911 GT3 was so outstanding, it’s hard to imagine how improvement is possible. It’s already safely established as one of the greatest interpretations of the 911 theme that we’ve seen since the rear-engined, six-cylinder sports car first appeared in the early 1960s.

    To devise a GT3, Porsche Motorsport takes the standard production model of the day and turns it into a track-day racer which is still civilised enough for everyday road use. A GT3 is for those owners who appreciate the finer points of handling and performance; it is not a car for posers. Based on the 997 body, the 2006 GT3 was a far more satisfying car to drive than the earlier 996-based version which it replaced. The difference was found in the fast corners: the 996 GT3 was completely safe at high speed but it lacked the exquisite handling quality of its successor which was, quite rightly, praised to the skies by every tester who got their hands on one.

    Now we have driven the latest GT3, the second-generation 997 GT3, which will go on sale in the autumn – and we have the answer to that question: how could it possibly get better? First, the engine has been made more efficient, resulting in slightly reduced CO2 emissions and fuel consumption, as well as more power. Displacement is up to 3.8 litres, with maximum power up 20HP to 435HP. A noticeable increase in mid-range torque sees 0-62mph in 4.1sec and a top speed of 194mph. The standard brakes have been uprated to suit the increased performance; ceramic brakes remain an option.

    Porsche test driver, Walter Röhrl, found he was five seconds a lap faster round the old Nürburgring in the new GT3 than he had been in the previous model. This time, he got round in 7min 40sec and, when you’re down to lap times like that, five seconds is a very big difference. An increase of 20HP won’t save that much time. It’s the advances in aerodynamics which achieved that result, without doubt. On average, downforce has been doubled, thanks to a lowered and reshaped front spoiler plus a more aggressively angled rear wing, which follows a racing pattern. Close to maximum speed, the downforce is five times greater than before, producing 110kg at 300kph. Many hours of painstaking work went into the details, keeping the coefficient of drag admirably low at 0.32.

    There are significant changes to the basic chassis set up as well as to the aero side, all aimed at reducing understeer, increasing rear axle stability and bringing a more benign feeling of controllability to an already excellent car. After driving the new GT3 extensively on the road in Germany, it does feel as if all the objectives have been achieved. Through bends on country roads, the steering response is accurate and grip is naturally excellent. Cornered fast, the GT3 is perfectly predictable and it feels very secure. Very close to its maximum speed on an unrestricted autobahn, the aerodynamic stability was perfect.

    This time, the GT3 has acquired Porsche Stability Management, with software adjusted to please the fastest drivers. It can be turned off in stages, and that would be interesting on a fast circuit. These are not cars for beginners, obviously, but I think even the most experienced fast drivers will be surprised by how good these systems now are. They don’t intervene in an irritating, dumbed-down way any more. For fast road driving, however, it’s definitely better to leave all the electronic help turned on. I tried it both ways through slow to medium bends and came to the conclusion that it’s much more like hard work with ‘SC+TC’ off, and no quicker at all.

    If you want the easiest ride in a 911, get one of the standard roadgoing models and, I suggest, opt for the excellent new PDK (double-clutch) transmission. On the more extreme GT3, you can only have the six-speed manual gearbox, which is 30kg lighter than the PDK. Keeping the weight down was a major objective in planning this GT3 and, at 1395kg, it is not one kilogramme heavier than the old one.

    As before, the GT3 remains a civilised road car, considering its performance. It’s easy and unfussed in low-speed traffic and, despite the slightly stiffer springs and dampers, the ride is still surprisingly acceptable. If anything, it’s slightly better than before.

    Now, just one question remains: when you get to a fast circuit like, say, Spa, and you point it into those ultra-fast bends, will this second-generation 997 GT3 feel as fabulous as the car it replaces? Well, Walter Röhrl tells me that it will and, thanks to that new downforce, it’s just that bit quicker and that bit more relaxed. Every instinct tells me he’s right there and Mr Röhrl has never told me a lie; ever.

    Costing from £81,914, the new GT3 is as attractively priced as ever. Like the last one, which sold out quickly, it’s a real bargain when you look at its rivals. No doubt there will be an RS version announced soon enough, but nothing has been stated yet on that front.

    May 07 2009

    Porsche Cayman S Road Test

    This speedster takes a powerful step along the evolutionary road.

    2009 Porsche Cayman S


    2009 Porsche Cayman S 2009 Porsche Cayman S 2009 Porsche Cayman S 2009 Porsche Cayman S 2009 Porsche Cayman S 2009 Porsche Cayman S2009 Porsche Cayman S2009 Porsche Cayman S2009 Porsche Cayman S

    Continue Reading »

    May 07 2009

    4-cylinder next-generation Boxster ??


    Purists might cringe at the thought, but the latest information out of Germany is that Porsche will put a 4-cylinder into the next-generation Boxster, due out in 2011. Possibly an even tougher pill to swallow, it’s rumored a turbodiesel will find its way into Porsche’s mid-engine convertible by 2013!


    Why such drastic measures? With ever-increasing emissions and fuel economy regulations, automakers need to find ways to build more efficient cars. And Porsche’s intent with the next Boxster — expected to be launched at the 2011 Geneva auto show — is to build nothing less than the most economical Porsche ever.

    To achieve this lofty goal, Porsche will put a small-displacement turbocharged inline 4-cylinder sourced from the VW/Audi family into the Boxster. But fear not, it will still have plenty of power, to the tune of about 270 bhp we’re told. While VW Group’s direct-injected 2.0T is the most obvious choice, rumors have circulated that Porsche might scrap that plan and design a horizontally opposed turbocharged 4-cylinder of its own, which would be more in keeping with Porsche’s boxer tradition and its inherent low center of gravity.

    Besides the smaller, lighter engine, Porsche also aims to take weight out of the Boxster’s body and chassis. The new car will ride on a slightly longer wheelbase and have a wider track. Every single body panel will also be new, although the Boxster’s basic silhouette will remain. Notable changes include higher, more pronounced fenders, a shorter front overhang, larger side air intakes and door-mounted mirrors. Although driving a Boxster without the familiar flat-6 wail will be strange, it’s sure hard to argue with a car that’s less expensive, lighter, better performing and more like its spritual forefather, the 550.

     

    Apr 24 2009

    The next Porsche GT3 is the 911 for the hard-core enthusiast


    The next Porsche GT3 is the 911 for the hard-core enthusiast

    By J. P. VETTRAINO

    The Porsche 911 GT3

    2010 Porsche 911 GT3

    Engineers who developed the 2010 Porsche 911 GT3 call it “the best of all worlds” in the current 911 lineup: an unsurpassed mix of race, track-grade performance and acceptable street comfort. We’d call the GT3 the coolest and the absolute most engaging 911 to drive, and we’re not suggesting the others are anything close to dull. The irony might be that the next GT3 has neither of two key characteristics that have defined the latest generation of 911s.

    The current 911 platform, known to Porschephiles as 997 Gen II, was launched in the fall of 2008 with the Carrera and the Carrera S. Both cars debuted with Porsche’s latest six-cylinder boxer engine, featuring a one-piece crankcase and direct fuel injection, and an optional PDK dual-clutch auto-shift transmission. The GT3 will be the only car among current and future 997 Gen II variants with an old-school, split-crankcase block and conventional sequential fuel injection.

    That’s because the GT3 is the homologation car for various production-based Porsche race cars, from the GT3 RSR to Grand-Am Cup cars, and all of them (not to mention the Grand-Am Prototypes) use the old-style crankcase cast in two separate halves. The GT3’s split block engine is more time-consuming and expensive to build than the newer engine, which has far fewer castings in general, and it’s not readily suited to high-pressure direct injection. The good news for Porsche freaks is that the split-crankcase boxer still hasn’t reached its development potential, and the new GT3 drives the point home.

    The 2010 GT3 boxer is similar to the previous GT3s, but it’s been bored out an extra two millimeters. Displacement increases from 3.6 liters to 3.8 liters, and the exhaust cams now feature Porsche’s VarioCam variable-timing system. The new 3.8 has aluminum pistons, titanium connecting rods, a steel crank and less mass throughout the valve train, thanks to hollow camshafts and lighter valves. It’s redline increases to 8,500 rpm, and its dry-sump lubrication system uses seven oil pumps to meet the demands of track-level lateral g loads.

    The most obvious improvement? The GT3 3.8-liter boxer generates 435 hp at 7,660 rpm, and 317 lb-ft of torque at 6,250 rpm. That’s a whopping 115 hp per normally aspirated liter, same as the previous GT3 engine, with the increase in displacement and an increase of 20 peak horsepower. More significantly, the GT3’s 3.8 makes 50 hp and 7 lb-ft more than the Carrera S 3.8, with its one-piece crankcase and direct injection. Yet thanks to the reduction in internal mass and efficiencies such as improved pumps and accessories, the new, more-powerful GT3 engine improves fuel economy two percent in the European cycle and reduces C02 emissions.

    As for the other 997 Gen II trademark–the PDK transmission–purists will be pleased to know that the 2010 GT3 will be available only with a six-speed manual. Its ratios are fairly closely spaced, without an overdrive gear.

    Underneath, the GT3 features threaded suspension components that can be track-adjusted for ride height, track width and camber. Its springs are stiffer than any Carrera’s, only now the GT3 comes standard with Porsche’s PASM electronically variable shocks. The control algorithms are more aggressive than in other 911s, but PASM does good things for ride quality when the GT3 is just motoring between points. The 2010 GT3 will come standard with 19-inch center-lock wheels, each five pounds lighter than the previous generation’s, fitted with 235/35ZR-19 Michelin Pilot Sport Cups in front, 305/30ZR-19 rear. Its brake rotors are substantially larger than either the Carrera’s or the previous GT3’s, and Porsche’s ceramic-composite option will be available.

    Part of the GT3’s appeal lies in its unique aerodynamics and the look they create. The 2010 model generates five times more downforce than its predecessor, according to Porsche, thanks partly to its unique front end, now custom-tailored for the GT3 and available on no other 911. The rear wing is also larger than before, with prominent side plates, and airflow into and out of the engine compartment is improved. The GT3 sports a cross-length vent below its engine-compartment lid, which you won’t see on any other 911, and unique vertical slits at each end of the rear bumper.

    The new GT3 weighs 3,076 pounds wet, or 110 pounds less than the lightest Carrera, and only a pound more dry than the RSR race car. Other numbers look impressive, too: 0 to 62 mph in 4.1 seconds, with an aero-limited top speed of 193 mph, according to Porsche. The development engineers say it laps the Nordschleife faster than any 997 Gen II variant to date–15 seconds faster than a Carrera S with every performance option.

    From the driver’s seat, everything in the new GT3 feels more mechanical than it does in a Carrera, but almost subtly, never jarringly so. The shifter might be the biggest change in this respect, and the hardest to get used to. It’s very solid and deliberate, and it won’t find the next gear unless the driver puts it precisely in the slot, but it can be very quick. The hard-core will love it, and they’ll like the heavier clutch pedal as well.

    Better, there’s an amazing flow of torque from the GT3, everywhere in the engine’s range. Its boxer six pulls in a gloriously visceral way that few automotive experiences match–and all the way to its 8,500-rpm redline. The gear ratios are nicely matched. While it’s most fun to use them all, the torque is so well spread across the power band that at least two or three of the six gears will work in most situations.

    Beyond the engine, it’s hard to decide what we like best about the GT3, though the throttle may be next on the list. The gas pedal has good travel. Once you get used to it, it’s easy to manage the car’s speed or attitude in a corner with subtle movements of the right foot. And behind everything flows the sweet, raspy exhaust sounds. Push the pedal deep enough, and you’ll hear a flap in the pipes reroute the airflow. The roar drops an octave and the decibel level increases.

    The GT3 steers with firm directness, and never with the overboosted feel that some very capable competitors deliver these days. Feedback through the wheel makes it easy to tell how much grip is left in the tires. The ride can be surprisingly supple, though what’s fine on Germany’s smooth back roads may not be so in Denver or Detroit. At 150 mph on the autobahn, the firm suspension generates a washboard harmonic over pavement seams, but small, rapid body movement never feels like lift or lightness or even bounciness. The GT3’s tires stay firmly, securely in contact with the road surface.

    The 2010 GT3 will offer a couple of new options, starting with dynamic engine mounts intended to improve both handling and comfort. These electronically control the engine’s movement in the car, and they allow higher lateral g loads by maintaining balance, according to Porsche. They also improve cockpit comfort by softening and more aggressively damping vibration when the car is driven at a more casual pace. A new Front-Lift System raises the front end 1.2 inches with the touch of a switch, to get the GT3’s front spoiler in driveways or over low curbs without scraping. It lowers the car again when speed surpasses about 30 mph.

    Counting all the Carreras, Cabriolets and Targas currently available, the GT3 will be the 11th variation on the current 911 available in the States. A new Turbo is certain to follow, and probably a GT2. The GT3 will reach Porsche dealerships by fall, at $112,200 plus $950 destination. That’s $35,900 more than the standard Carrera, and the well-heeled hard-core may consider it a bargain.

     

    Apr 03 2009

    Porsche 911 GT3 RS

    Take a look at the meanest Porsche 911 GT3 RS ever. This roadgoing track-day special has been spied doing some high speed testing at the Nurburgring – and the differences between it and the regular GT3, which was recently revealed at the Geneva Motor Show, are clear to see.

    In addition to the new rear lights and LED daytime running lights of the new GT3, the RS version adds wider front wings, deeper side skirts and an enormous rear wing. Aimed at track day enthusiasts, the wing is adjustable and made from carbon fibre to keep weight down.

    Other changes over the regular GT3 include a standard-fit roll cage with increased bracing to add even more stiffness to the chassis and a featherweight plastic rear screen. Porsche’s adaptive PASM dampers will also come as standard while power will come from the same 429bhp 3.8-litre flat six-cylinder engine as the GT3. Expect 0-60mph in four seconds and a top speed in excess of 185mph.

    Expect the 911 GT3 RS to make its public debut at the Frankfurt Motor Show in September

    Mar 21 2009

    Porsche Panamera: tech pics

    d

     











    Mar 16 2009

    DSG dual-clutch transmission

    DSG dual-clutch transmission

    March 13, 2009

    By Guy Desjardins

    The DSG gearbox, which takes its name from the German DirektSchaltGetriebe, is known commonly in English as the Direct Shift Gearbox.. This type of transmission is called DSG exclusively on Volkswagen products and by other names depending on the car maker. It is generally called DCT for Dual Clutch Transmission in English.

    Many manufacturers are presently offering this transmission and it is no longer only for top-end cars or sports cars since it will soon be available on vehicles with smaller engines like the VW Golf and the Ford Focus. Audi calls it S-Tronic and for Porsche, it’s known as Porsche Doppelkupplung, or the PDK Gearbox for short. The term used at Mitsubishi is TC-SST for Twin Clutch Sportronic Shift Transmission. As for the Americans, Ford will soon launch a version of the dual-clutch gearbox under the name of “Power shift”.. Nissan has been selling its own dual-clutch gearbox for a little while now, specifically on the GT-R. Dual-clutch transmissions are already very popular in Europe, since they help reduce fuel consumption and vehicle weight, but they are offered to North Americans mainly as an option to help significantly improve the performance of high-end German sports cars.

    Not so new after all
    The concept of the dual-clutch gearbox is not exactly new. It was invented in 1935 by French engineer Adolphe Kégresse and christened “Autoserve”, and was first installed in a Citroën Traction Avant in 1939. Abandoned for many years, the idea momentarily resurfaced in the 1980s on the Porsche 956 and 962 C competition vehicles as well as the Audi Sport Quattro. However, it would not be until 2003, after six years of work by the Volkswagen Group and its German supplier BorgWarner, that it would return in production vehicles, notably the European versions of the Golf R32 and the Audi TT. Currently, it is its gear change speed and that it simulates the experience of driving a race car that make up the primary arguments for buying it. Since 2008, a seven-speed version (DSG7) has been sold for vehicles with smaller engines mainly for better fuel economy. Since Kégresse first invented it, the biggest innovation to the dual-clutch gearbox is the use of an electronic control to anticipate the choice of the best gear.

    How it works
    It differs from an automatic transmission with manual mode mainly because of the presence of two clutch packs. In fact, the twin-clutch gearbox is essentially made up of two gearboxes joined by a pair of clutches, one for even-numbered gears, and one for odd-numbered gears. It’s a little like dividing a conventional transmission into two half gearboxes – one for gears 1, 3 and 5, and the other for gears 2, 4 and 6. The best way to understand the concept is through a concrete example.

    When the driver starts, the first half gearbox is engaged in first gear, while the second half gearbox is already placed in second gear. The driver accelerates in first gear. When the time comes to shift into second, clutch two intervenes to change gearboxes. The first clutch is disengaged and the second clutch shifts into second on half gearbox #2. At the same moment, half gearbox #1 pre-selects third gear. Next, when the time comes to shift into third gear, the clutch re-engages half gearbox #1 and slides into third gear, which has already been pre-selected. At this time, half gearbox #2 pre-selects fourth gear…and so on. Calculating the next logical gear is the job of the electronic control unit, and not even the transmission knows what’s coming.

    When gears are changed progressively in logical ascending order, gear changes are very fast, but non-sequential shifting can mean the loss of precious seconds. Shifting from second to fourth, for example, will take longer since these two gears are on the same half gearbox. The longest reaction time will be when going from second to sixth or from sixth to second since these gears are on the same gearbox and are furthest from one another.

    Sequential gear changes, in addition to being fast, help avoid power loss and eliminate lapses of acceleration. When the car is in second, third is already pre-selected by the odd half gearbox, but not yet engaged by the second clutch.. Once the ideal shifting point is reached, the clutch associated with the second gear opens (leaves its position) while the other closes (engages) simultaneously. This overlapping process where one clutch opens and another closes makes for comfortable gear changes in no more than three or four hundredths of a second. Thus, available power is continual and smooth.

    Driving with a DSG
    Volkswagen’s DSG, like most twin-clutch transmissions, functions using the traditional P-R-N-D-S scale, but the difference is that this transmission operates automatically in both modes, D and S, with D for comfort mode and S for a sportier, more incisive ride. In comfort mode (D), gears are engaged earlier in order to avoid revving too high, which generates less noise and helps limit fuel consumption. In sport mode (S) however, the gearbox makes longer use of the first gears in order to keep the engine in its maximum efficiency range, or at its highest rpm.

    So we get torque and maximum power the majority of the time, which is particularly nice in the case of cars with turbocharged engines, like those that German manufacturers Volkswagen and Audi have made their speciality. Although the automatic mode works wonderfully, it is possible to switch to manual mode by moving the stick to the left or to the right to control gear changes but moving the stick up or down. In certain models, it is also possible to switch to manual mode using the paddles mounted behind the steering wheel like in a Formula 1 car. Use the one on the left to upshift, and the one on the right to downshift.

    Of the several advantages of this type of transmission, the most obvious is without a doubt, the speed of changing gears which takes place in a fraction of a second. This benefit is clearly appreciated in auto racing where there are thousands of gears changes. Otherwise, for regular day-to-day use and for production cars, this feature doesn’t provide the same advantages.. In fact, for daily use, this type of gearbox mainly helps obtain better output and smoother shifting and reduces fuel consumption, while making accelerating more linear since interruption in power flow. And for driving enthusiasts, there is not doubt that the DSG gearbox brings unparalleled driving pleasure, nearing that experienced by race car drivers.

    Basically, the revolutionary direct shift gearbox sets itself apart by gear changes with no lapse in propulsion. In other words, it helps change gears without a noticeable interruption in flow of power and changes gears extremely quickly, to the tune of about 8 milliseconds. For comparison’s sake, consider that the transmission used in the Ferrari Enzo needs nearly 150 milliseconds to change gears. The DSG is also ten times faster than the BMW SMG transmission, which is the fastest automatic transmission with manual mode currently on the market. If we are to trust Audi’s numbers, the gear changes are made faster than they could be done manually. For example, the A3 with a 6-speed manual transmission goes from 0-100 km/h in 6.9 seconds, while it takes only 6.7 seconds with the DSG transmission.

    Thus, the DSG transmission is as comfortable as an automatic transmission and as exciting to drive as a standard transmission. Available on more and more affordable models, it is a tremendous success and will probably be the best selling transmission very soon. In fact, only the CVT transmission is smoother and thriftier than the DSG, but it obviously doesn’t provide the same sensations.

    Benefits
    Ultra fast shifting
    Better fuel consumption
    No loss of power flow
    Gear changes without grabbing or jerking motion
    Avoids bad gear changes therefore easier on the engine
    Lighter than an automatic transmission

    Drawbacks
    Takes longer for gear changes on the same half gearbox
    Mechanical complexity
    More costly to manufacture
    Heavier than a conventional standard transmission

    Mar 15 2009

    Hamann Porsche 911 Turbo

    Porsche 911 Turbo is surely one of the fastest sport cars in the world at the moment but of course, there are still some car tuning companies, like Hamann that can modify anything, from Mini Cooper to Ferrari. If you are not pleased with the car’s initial power (480 HP), Hamann created a special performance tuning kit called Hamann Stallion that will boost the engine’s power to 630 HP. To gain this additional power they changed the car’s turbocompressors with new ones that are bigger and stronger and they also installed a new exhaust system made from stainless steel and they modified the car’s engine cooling unit. But the guys from Hamann weren’t pleased only with engine modifications. They also cut around 8 cm from the car’s roof, they equipped the car with 20″ rims, Lambo doors and they also made a lot of modifications to the car’s body kit to make it more aerodynamic. In the end, thanks to all these modifications, the new 911 Turbo will accelerate from 0 to 100 km/h in just 3.3 seconds and it could reach a maximum speed of 359 km/h.

    Mar 13 2009

    eRuf Greenster: the Electric Green 911

    The Greenster is essentially an open-top electric 911 with classic Targa styling, finished for the show in – of course – brilliant green paintwork.

    the Greenster’s battery can be recharged in less than an hour using a 400-volt power source.

    No performance figures were given but, while the show car sported a single, central 270 kW electric motor with 950Nm of torque, the forthcoming low-volume production series (scheduled for 2010) will feature twin motors

    Mar 03 2009

    Porsche 962 Schuppan 962CR


    The extraordinary prototype of the roadgoing Porsche 962 C.

    Just three of these Schuppan 962CRs were built in 1994 by VSL - the racing facility of race car driver Vern Schuppan. It is based on the dominant Le Mans-winning Porsche 962 race cars which Schuppan succesfully raced and owned with his team.

    At a purchase price of over $1.5 million in 1994 they are among the most expensive vehicles ever sold new.

    The carbon-tubbed 962CR weighs only 1,050 kg and uses the Porsche 3.3 Litre Type-935 engine borrowed from the IMSA GT Championship 962s - with twin KKK turbochargers and offering up to 600hp.

    The prototype was constructed from the finest materials available at every stage, and with a claimed top speed of 230 mph and a 0-60 mph acceleration time of 3.5 seconds, it is in every sense of the word a true Supercar.

    Assembly took place at the VSL race and production facilty in Buckinghamshire, England and funding was provided by Japanese investors who primarily supported Schuppans race team running in the All Japan Sports Prototype Championship. They were specifically created as a tribute to Vern Schuppans victory in a Porsche 962 at Le Mans 1983 24 hr race - the pinnacle of sports car racing.

    An incredibly rare prototype.  The prototype and launch car  Only three more 962 CRs built.  The only CR to use a “962 tub”.   $1.5 million when new.  Bespoke carbon chassis. Twin turbo Porsche engine

    Next »