Monday, November 30, 2009

The best Sport Car statistics , Sport Compact Comparison Test

We're in a 2009 Nissan GT-R, helmet on, seatbelt fastened, left foot poised to release the brake and unleash Godzilla's wrath. But we're not on a racetrack. In front of us there are 22 miles and 402 turns of the best driving road in the world, Southern California's Glendora Mountain Road. We've covered this ground thousands of times, but today it's different. Today there are two California Highway Patrol cruisers stationed at either end of this twisting strip of sun-drenched blacktop. It is our personal playground for the afternoon.

The radio crackles the "All clear" and with the GT-R's engine revved to a launch-controlled 4,500 rpm, we release the brake and let the big Nissan do what it does best: twist physics into knots.

This process is repeated all afternoon in a collection of today's quickest and most capable road cars. The list includes a 2008 Audi R8, 2008 Lotus Elise SC, 2008 Porsche 911, 2008 Mitsubishi Lancer Evolution X MR and 2008 Subaru WRX STI. We didn't discriminate: Rally cars, focused rear-drive performance cars and everything in between was invited to the party. In fact, there's only one genre missing from this otherwise comprehensive list — the big-power, rear-drive supercar. But it wasn't for a lack of trying.

Fact is, we asked Chevy for a 2008 Corvette Z06 and we asked Dodge for a 2008 Viper SRT10, but both refused to loan us their cars — presumably because we'd be testing their best metal against the almighty GT-R.

Sniff, sniff. Does somebody smell chicken?

The Test
The idea is simple: Find out if the quickest car on a racetrack is the quickest car on a mountain road. So we hit the track one day and the mountain the next. Then we ran every car through our standard acceleration, braking and handling tests.

We used the Streets of Willow Springs, a 1.8-mile natural-terrain road course, as our racing circuit. Then we ran that 1.8-mile section of GMR through the Angeles National Forest north of Los Angeles.

Our section of road included dozens of corners, including three 180-degree switchbacks, multiple blind bends and 721 feet of vertical rise. In the spirit of real street driving, we respected the yellow center line and used only one lane — just like we would if the road had been open. We recorded every lap of the track and every pass on the mountain road with our Racelogic VBOX (a GPS-based data recorder).

The Point
The groomed, glass-smooth surface of most racetracks is a far cry from the reality of uneven real-world roads where bumps, road paint, debris, blind corners and self preservation act as great equalizers. Racetracks are also designed to protect you from yourself. Run-off room, gravel traps and FIA curbing are there to keep you and your machine in one piece. On the road, mistakes come at a much higher cost.

Experience tells us big-power cars, which thrive on road courses, are often out of their element on tight mountain roads where rally cars like the Evo X and WRX STI do their best work. So these two genres were to represent either end of the spectrum. In the middle we knew we couldn't ignore the back-road brilliance of the 2008 Lotus Elise SC or the all-around poise of Porsche's 911. Audi's R8 and Nissan's GT-R, theoretically, represent the best of both worlds — big power combined with the confidence of all-wheel drive.

Some of you might also be wondering why we chose the base 911 over the much more powerful and all-wheel-drive-equipped 911 Turbo. The answer is simple: price. This base Porsche 911 costs about the same as the Nissan GT-R. We thought that was relevant. Just how much Porsche do you get for the cost of the big bad Nissan?

Other questions? Oh yeah. How about: On the street, does traditional go-fast hardware succumb to the long-travel confidence of an Evo or the nimbleness of a lightweight Lotus? How does Porsche's classic go-fast formula stack up against the current breed of machines? Is Audi's R8 as comfortable when driving hard as it is around town? Is the GT-R the quickest car on a track and a seriously tight mountain road? Can 3,900 pounds of rolling technology outrun 2,000 pounds of pure, focused driver's car?

The answers are below.

2009 Nissan GT-R
As-tested price: $75,925
Mountain road time: 2:04.35; Rank: 1st
Streets of Willow lap time: 1:25.68; Rank: 1st
0-60 mph: 3.5 seconds (3.2 seconds with 1 foot of rollout like on a drag strip)
Quarter-mile: 11.7 seconds at 116.8 mph
60-0 braking: 98 feet
Slalom: 74.0 mph
Skid pad: 0.96g

By now you've read every word printed about the 2009 Nissan GT-R. You know it's quicker than a 911 Turbo on a track. You've seen it beat the best the Americans can offer. You've read that it's as antiseptic as it is quick. And now you're reading that it can stomp damned near any car on any piece of tarmac, anywhere. Yes, Nissan's 480-horsepower, six-speed all-wheel-drive monster wins this test, too. It was quicker up the mountain road and around the Streets of Willow than any other car in this test.

Here's the thing about the GT-R. Despite its mass, it simply doesn't do anything poorly. It is the embodiment of technology conquering physics. And yes, it is less involving than other cars this quick. That said, it's always on your side. It's safe.

Only the R8 was able to top its cornering speeds through the tightest corners on the mountain road. On the track, which is faster still, it was untouched in virtually every corner. And it closes the gap between corners in less time than anything else sold today. Most striking is the fact that the GT-R is among the easiest cars to drive in this test. Even with its stability control disabled, it rarely does anything to make us question its poise. It's as stuck and predictable as it is massive. And, by every measure, it lives up to the hype.

2008 Audi R8
As-tested price: $134,545
Mountain road time: 2:04.68; Rank: 2nd
Streets of Willow lap time: 1:26.92; Rank: 2nd
0-60 mph: 4.5 seconds (4.2 seconds with 1 foot of rollout like on a drag strip)
Quarter-mile: 12.7 seconds at 109.0 mph
60-0 braking: 103 feet
Slalom: 71.0 mph
Skid pad: 0.98g

Audi's midmounted 420-hp, 4.2-liter direct-injection V8 is not only one of the best-sounding engines in the world, it's also one of the most potent. Combined with Audi's R tronic paddle-shifted six-speed transmission and distinctly rear-biased all-wheel drive, this German's price tag is high, but so are its abilities.

Take the R8's 2nd-place finish on the mountain road as proof positive that it's for real. Then notice that it trails the big-hype GT-R by only a third of a second over two minutes of twisting road and you can be certain of its real-world abilities. It was the only car to record quicker segment times and higher peak speeds than the GT-R over two of the four segments on the mountain road. It also had more agreeable balance than the GT-R in slow corners. The big Nissan pushed through switchbacks where the R8 found neutral balance and exited with its tail out.

The same was true on the track. The Audi's mass-centralized designed allowed it to rotate through slow corners more effectively than any other car in the test. Still, superb tuning kept it stable enough to be confident through high-speed transitions. Shifts were slower than in the GT-R, but paddles that turn with the wheel made them easier to nail at precisely the right second. Overall, the R8 offers more character than most of the other hardware here, and on the right road it will hang with the GT-R.

But we can't ignore the fact that it's the most expensive car in the test by a wide margin. In the end we love the R8 the same way we'd love carbon-fiber slacks: They're a wonderful luxury if you have the means, but when polyester will do the same job for half the cash, they're probably hard for most to justify.

2008 Mitsubishi Lancer Evolution X MR
As-tested price: $38,940
Mountain road time: 2:06.91; Rank: 3rd
Streets of Willow lap time: 1:29.02; Rank: 3rd
0-60 mph: 5.6 seconds (5.3 seconds with 1 foot of rollout like on a drag strip)
Quarter-mile: 14.0 seconds at 97.4 mph
60-0 braking: 111 feet
Slalom: 68.9 mph
Skid pad: 0.92g

The Evo X's twin-clutch six-speed transmission, when used in Super Sport mode, is a revelation. Until now we haven't driven an automanual transmission which so thoroughly eliminated the need for a clutch pedal and gearshift, but when driving hard, the MR does just that. In fact, with another 75 horses (the Evo X is rated at 291 hp and 300 pound-feet of torque), it likely would have upset the mountain road finishing order in a big way. As it sits, it flat spanked the $85,000 Porsche and walked all over the little Lotus.

With its stability control switched off and its Super Active Yaw Control precisely directing drive to the appropriate contact patch, the Evo found itself 2nd only to the GT-R in the fastest segment on the mountain road. Its peak speed through this section of road was 1.5 mph faster than the R8. There's more confidence here through fast transitions than in any other car.

The Evo's secret weapon, however, is its transmission. It's always in the right gear. Unlike the paddle-shifted transmissions in the GT-R and the R8, the Evo's six-speed thinks for itself and maximizes the car's performance. Sure you can mess with its paddles if you want, but only if you want to go slower. Plus, there's less to consume the driver's brain power, so driving is less frantic.

The Evo MR, however, is too soft to take full advantage of its otherwise stellar chassis when the going gets truly uneven. We bottomed the suspension on several occasions. A big part of an Evo's advantage on a road like this is being able to put its tires in places that would upset cars with less suspension travel. But the MR's softer Bilstein dampers simply aren't up to this kind of pounding. The GSR's suspension is likely better suited to this terrain, but it's not available with the twin-clutch gearbox. So we're left wanting an Evo that doesn't exist — and knowing that it would be quicker still.

2008 Porsche 911 Carrera
As-tested price: $85,765
Mountain road time: 2:09.51; Rank: 4th
Streets of Willow lap time: 1:29.25; Rank: 4th
0-60 mph: 4.8 seconds (4.5 seconds with 1 foot of rollout like on a drag strip)
Quarter-mile: 13.0 seconds at 108.1 mph
60-0 braking: 104 feet
Slalom: 72.2 mph
Skid pad: 0.92g

Few sports cars are as fundamentally sound as Porsche's 911. Even this base model reminds us how steering should feel and how brakes should perform. Problem is, even a Plain Jane 911, which comes with a six-speed manual transmission and 3.6-liter engine good for 325 hp and 273 lb-ft of torque tops $85 grand with only a few options. That's almost $10 grand more than the GT-R, which will mop the road with all six of the 911's horizontally opposed pistons.

Still, we find it hard to not appreciate 50 years of sports car refinement. There's a poise and elegance about Porsche's timeless rear-engine design that's evident in its driving experience. And its edgy side is virtually gone. This side of the 911 is welcome in the mountains where there's no runoff and little room for error.

But these same traits — the slower reactions and tamer control feel — keep the rear-wheel-drive 911 from edging the Evo on the track where it missed the mark by only about a quarter of a second (0.23). That gap extended to 2.6 seconds in the mountains, where the Porsche was less eager to rotate and couldn't match the Evo's launch out of slow corners.

The 911 is probably the most versatile car here from a driving perspective — capable of both comfortable daily transport and high-level performance driving. But it's not the best value if measured on lap times alone.

2008 Lotus Elise SC
As-tested price: $63,920
Mountain road time: 2:10.19; Rank: 5th
Streets of Willow lap time: 1:29.49; Rank: 5th
0-60 mph: 4.9 seconds (4.6 seconds with 1 foot of rollout like on a drag strip)
Quarter-mile: 13.3 seconds at 103.2 mph
60-0 braking: 110 feet
Slalom: 72.4 mph
Skid pad: 0.96g

With a new supercharged engine for 2008, Lotus' Elise finally has the power (218 hp and 153 lb-ft of torque) to match its chassis' abilities. A six-speed manual transmission backs up the power to drive the 2,028-pound plastic-and-aluminum machine to new levels of performance. Our test car also had the Sport Pack, which supplies forged wheels and Bilstein dampers.

Given its status as the most pure driver's car sold in the U.S., we had high hopes for the Lotus. But in this case, purity of experience doesn't add up to outright speed. More problematic is the lack of confidence created by its nervous character up to and beyond the limit. Most cars in this test extend a measure of control beyond the limit of grip that masks their edge considerably. Not so in the Elise. Its back-to-basics character doesn't allow this luxury. Get it sideways under braking and you better have fast hands and good car control or you'll soon taste regret. And regret on this mountain road involves stone walls.

Manual steering, which is spectacularly full of feel up to the limit, becomes a heavy liability when trying to recover a slide. Add all this up and the Lotus, despite having the right power-to-weight ratio and chassis to be competitive, winds up 5th — less than a second behind the Porsche on the track and in the mountains.

If success in this test were measured in adrenaline production or outright fear of death, the Elise wins hands-down. But in this environment, measured against the best cars modern technology car produce, Colin Chapman's simpler-is-better ethos is beginning to show itself for what it is: old.

2008 Subaru WRX STI
As-tested price: $39,678
Mountain road time: 2:10.72; Rank: 6th
Streets of Willow lap time: 1:30.05; Rank: 6th
0-60 mph: 5.3 seconds (5.0 seconds with 1 foot of rollout like on a drag strip)
Quarter-mile: 13.5 seconds at 101.8 mph
60-0 braking: 109 feet
Slalom: 69.7 mph
Skid pad: 0.90g

An STI at the back of the pack? What gives? Well, it isn't power, because the Subaru packs 305 ponies and 290 lb-ft of torque from its 2.5-liter four-cylinder. And it isn't weight, because the Subie weighs 250 pounds less than the Evo — its primary competitor. And, like the Evo, it has six closely spaced gears and all-wheel drive to put the power down.

Part of the problem is the STI's awkward manual transmission that requires deliberate shifts, every one of which is several tenths of a second slower than the Evo's twin-clutch gearbox. The STI was the only car we missed a gear in during three days of testing.

The rest of the time is down to response and precision — the ability to go exactly where it's pointed when it's asked. Compared to most other cars in this test, the Subaru lacks both. And without the Evo's ability to rotate quickly in a corner, it can't put power down until later in every turn — a deficit its acceleration advantage simply can't overcome.

And then there's the understeer, which limits acceleration out of every corner. We ran the STI up the hill and on the track with its center differential set to Auto and its throttle calibration in Sport Sharp. But the settings don't seem to make a difference. This car works its front tires. Period.

Ultimately, the STI isn't as universally capable as expected. It also produces the least grip of any car in this test, lowering its cornering speed and slowing its times on the track and on the road. A rougher mountain road would likely have better illustrated the STI's abilities and moved it slightly up the ranks on that part of the test.

The Take-Away
Even in a test without a winner, it's hard to ignore some simple facts. All-wheel drive matters. Both on the track and on the mountain road, cars putting power to all four wheels were consistently quicker and easier to drive than their two-wheel-drive counterparts.

We also learned that speed doesn't always cost money. The Evo, the cheapest car in this test, proved that. Just as the Audi R8 demonstrates that it's possible to have a comfortable street car that makes the numbers and goes really friggin' fast.

But in the end, the quickest car on the track was also the quickest car on the street. Nissan's GT-R again proves itself to be today's most impressive performance car. Capable of crushing all comers in any environment, its abilities are tough to match at any price. Nobody will ever accuse it of being subtle. And it's not comfortable. But if outright speed is the measure that matters, we can't find a better machine.

And that, we figure, won't surprise anybody at Chevy or Dodge.

The manufacturers provided Edmunds these vehicles for the purposes of evaluation.
2008 Audi
R8
2008 Lotus Elise SC 2008 Mitsubishi Evo X MR 2009 Nissan
GT-R
2008 Porsche 911 Carrera 2008 Subaru WRX STI
As-tested price$134,545$63,920$38,940 $75,925$85,765$39,678
0~60 mph acceleration,
sec.
4.5 seconds
(4.2 seconds with rollout)
4.9 seconds
(4.6 seconds with rollout)
5.6 seconds
(5.3 seconds with rollout)
3.5 seconds
(3.2 seconds with rollout)
4.8 seconds
(4.5 seconds with rollout)
5.3 seconds
(5.0 seconds with rollout)
Quarter-mile elapsed time
and speed
12.7 seconds
at 109.0 mph
13.3 seconds
at 103.2 mph
14.0 seconds
at 97.4 mph
11.7 seconds
at 116.8 mph
13.0 seconds
at 108.1 mph
13.5 seconds
at 101.8 mph
60-to-0-mph braking, feet103 feet110 feet111 feet98 feet104 feet109 feet
Lateral acceleration, g0.98g0.96g0.92g0.96g0.92g0.90g
600-foot
slalom, mph
71.0 mph72.4 mph68.9 mph74.0 mph72.2 mph69.7 mph
Streets of
Willow lap time
1:26.921:29.491:29.021:25.681:29.251:30.05
Mountain road time2:04.682:10.192:06.91

Hot ! Computer model... it meals all youngist heart away.. not to mention ...




Every year, every new faces moving at every discrete corner participating events like, bitex, computex, and so on, it wasnt at the intention that they are charm with beauty... rather to said, they are pairing into electronically as one part that we used to believe they are electronic girl or model... Well, well is computer items really hot to be sold or these models are too hots that people feel irresistible to make purchase.. the answer remain unknown..

Looks on all those hot shot... In F1 - the racing cars are so gigantic, people could hardly read a marboro on the advertising panel in any part of the car, yet people believe that by certain color scheme those cars are honda owned, Mercedes or Ferrari ...

Compare to there very hot model, intel, nvidia just run out of sight... no sight of lntel processor attached, no sight of nvidia chipset attached to the model... it seems that the only hottiest is nothing other than than the hot model...

lets read read read...

Sunday, November 29, 2009

Search Me.. Now Expand your posibility

Now, takes up the greatest challenge of all time, how good are you in pasta... if you like some really good food, try this recipe at home
: spaghetti
: dry tomato
: hint of olive oil
: salt
:pamesan
: dry mushroom
: garlic
: chicken mince...



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Rabbit is the friend of Goat , Queen of all rabbits


Very cute rabbit , cute or not ? feel free to download and give some comments




Saturday, November 14, 2009

The 2012

What the phopechy told ?

People are living up life for life... The 2012 tragedy... what will the new world of us become, the best search for 2012 lies here...

Please write you own phenomenum ... The best story line will be rewarded ...

Monday, November 9, 2009

AWD VS 4WD, Subaru on the rock

AWD is almost useless beyond pavement

My comment relates to the way (automatic) "all wheel drive" vehicles (usually minivans - some SUVs like Lexus RX300 or Ford Explorer V8) distribute torque to the wheels and how they manage traction. Automatic AWD is different than "true" AWD (see below).


why I am using the term torque rather than power

Part time 4WD vehicles always distribute torque inside their transfer case 50/50 to front and rear when the shifter is in one of the 4WD positions (Hi or Lo). Most of the time each of the 4 wheels gets 25% of the torque - that minimizes wheel spin. This system is very strong and reliable - unfortunately it can't be used on pavement. Should one of the wheels or one axle lose traction - the other axle will still receive a reliable supply of torque (up to 100%) through the transfer case.

Conventional full time 4WD vehicles use a differential inside the transfer case to make 4WD use on pavement possible. This is done with a ring and pinion set or a planetary gear set. Each of the 4 wheels constantly gets 25% of the torque (as long as the ground is level and traction is equal) - that in itself prevents wheel spin. This setup is also very strong and reliable. However, this system would be handicapped for off-road use (it is much more likely to lose traction off-road than on-road) if it would not have some sort of spin control. Call it traction control, if you will. If one of the tires or one axle would lose traction - the differential in the transfer case (often called "center differential") would allow the axle with lost traction to spin (could be both tires or one). To avoid this some of the full time 4WD vehicles offer a manual center differential lock (all LandRover, Mercedes G etc.) or other means of (automatic) spin control. A mechanically locked center diff acts like a part time transfer case - and is as strong and reliable as a part time system off-road. Some vehicles do not manage or lock any of the differentials. Instead they have systems that slows down spinning wheels.

Now, all wheel drive (AWD) is a completely different "beast". In my opinion it is useless beyond pavement because it does not have low range like the other two systems. Low range provides necessary crawl speed for maximum control during difficult driving situations. And low range range provides a significant torque multiplication.Low gears in a 4WD are like the low gears in a mountain bike. Can you imagine a mountain bike without low gears? Main drawback of AWD is that the transfer case can't be manually locked. Two different systems are in use - neither one works well for use beyond pavement:
AWD System one (true all wheel drive - or full time symmetric AWD) has a conventional differential inside the transfer case - each of the wheels gets about 25% of the torque as long as traction is equal. However, the center diff cannot be mechanically locked.
To prevent a complete loss of traction when one wheel or one axle would spin, a viscous coupling or a similar device like a Haldex coupling (
see note) will try to "glue" both driveshafts together to keep enough torque flowing to the axle with traction. Works kinda OK on slippery pavement when the vehicle has already sufficient momentum and the connecting device has to kick in very infrequently. Off-road or in other situations with slow speed and high demand for torque the glue box (viscous coupling or Haldex etc.) is overstressed and fails to deliver the needed torque. High torque transfers and continous use make especially viscous couplings fail. Haldex units are much more reliable but cannot satisfy the constant high demand for torque at all wheels either.

AWD System two (automatic asymmetric AWD - and in a way actually only a sophisticated 2WD system) might not have a differential in the transfer case (Volvo, Honda, Lexus, etc.) but some do (Jeep Grand Cherokee). Primary power goes only to one axle (makes spinning tires much more likely due to inefficient use of traction - as likely as in any other 2WD car). However, both drive shafts are joined by a viscous coupling or a similar device (see note) and as long as all 4 wheels turn at the same speeds the control unit remains inactive. Once the powered axle or one of the powered tires loses traction, the powered drive shaft rotates faster than the one that is just rotating along. The control unit reacts to the speed difference and kinda glues both drive shafts together. This way the previously unpowered shaft will get some of the torque and rescue the failing tires. Same story as in system one: Works kinda OK on slippery pavement when the vehicle has already sufficient momentum and the control unit has to kick in very infrequently. Fails miserably when need of high torque arises or when activated frequently. Cannot satisfy the constant high demand for torque at all wheels when off-road.

Now you may understand better why I think AWD is not suitable for use beyond pavement.

The last generation Jeep Grand Cherokees (1999 WJ and 2005 KJ) with QuadraDrive II are not to be confused with a viscous coupling system. The J GC also powers only one axle (rear) but the Gerodisc technology and E-Gerodisc used by Jeep is very strong, very reliable and provides sufficient amounts of torque to where it's needed.

Note:
The various temporary connecting devices like viscous coupling, Haldex or Gerodisc perform different duties in full time symmetric AWD and automatic asymmetric AWD:
In full time symmetric AWD they perform traction control duty (ie keeping the rear axle from slipping - longitudinal, or front to rear, control) - in automatic asymmetric AWD they are on duty to create temporary AWD.
To make things truly confusing, these devices can also be used (inside the differentials) to keep wheels from slipping - transverse, or side to side, control.
It gets worse. The brakes can also be used for transverse traction control
.

An honorable exception from the rule "AWD is almost useless beyond pavement" are VW Sycro Vangon. Yes they have viscous couplings to distribute torque front/rear - but they have a granny low first gear and they have axle diff locks (real diff locks!). So, they are much more capable than most folks think.