Vtg Drive

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Wild guess. Who (or what) is the recipient of the Best of What's New award for Popular Science Magazine's automotive category?

Are you thinking Ford? Are you thinking Jaguar? Are you thinking General Motors? Or how about the automatic dimming rearview mirror created by Gentex? How about those Chevy parts that look as if they were made from the future?

If you guessed these, then you are totally wrong.

You see, the recipient of the Best of What's New award for Popular Science Magazine's automotive category is the 2007 Porsche 911 Turbo. This award is actually part of This Year's 19th Annual Best of What's New awards by the mentioned magazine.

If you are interested in knowing more about this vehicle and how come it was the one chosen by Popular Science Magazine, then you may want to catch the December issue of the magazine which would soon be hitting newsstands (and perhaps even your favorite bookstore) come the 14th of this month.

According to the editors of Popular Science Magazine, the 2007 Porsche 911 Turbo was chosen because it used the Porsche variable turbine geometry (or the VTG) setup. Such was first developed and used in the mentioned vehicle. And this was also created with the assistance and cooperation of yet another company - the Borg Warner Turbo Systems.

Many are not yet quite familiar with this vehicle, after all, it has only been on sale just this summer. However, this award just goes to see that even the newest could also be the best.

As per the VTG setup, the technology was actually based on the type of technology that has been used in previous years by diesel engines that were used in early 1990s units. The technology has been quite successful for such vehicles and Porsche did believe that it could also work well for the 2007 Porsche 911 Turbo.

Experts in the industry do say that such a concept is quite alike to other manufacturers of turbo who make use of variable nozzle or geometry compressors. These other manufacturers also do make use of a system that was for a short time used on some series of gasoline production engines.

Joe Ratzkin is an avid fan of anything automotive. This 34-year old bachelor wanted to be a mechanic when he was a kid but changed his mind and became a freelance writer and researcher instead. He is currently based in Chicago, Illinois. You can visit Chevy parts for more information.

Porsche 911 Turbo 2007

The new Porsche 911 Turbo features a revolutionary 480-horsepower, twin-turbocharged, 3.6-liter boxer engine with the world's first gasoline-engine application of variable turbine geometry (VTG), a redesigned all-wheel-drive system, and evolutionary styling.

The new 911 Turbo's engine produces 480 hp at 6,000 rpm, 60 bhp more than its predecessor, raising specific output of the 3.6-liter boxer-Six to an all-time high of 133 bhp per liter. More notable is the engine's torque curve, which has been bolstered and broadened by the variable turbine geometry system. Peak torque rises to 457 lb-ft (previously 415 lb-ft), but that peak now spans an extended rpm range from 1,950 to 5,000 rpm, compared to 2,700–4,600 rpm in the previous 911 Turbo. Additionally, a function in the optional Sport Chrono Package allows a 10-second, mid-rpm-range ‘overboost', temporarily increasing turbo boost under full throttle by 2.9 psi, and swelling peak torque to 502 lb-ft.

A 911 Turbo equipped with the optional 5-speed Tiptronic S automatic transmission requires only 3.4 seconds to sprint from 0 to 60 mph. Equipped with the standard six-speed manual transmission, the new 911 Turbo reaches the same 60 mph mark in 3.7 seconds. With either gearbox, the top track speed of the new 911 Turbo is 193 mph.

Much of the 911 Turbo's improved performance can be attributed to the variable turbine geometry system, the first such system available on a turbocharged gasoline engine. The heart of the technology is adjustable guide blades, which can vary in angle to most effectively guide engine exhaust flow onto the turbocharger's impeller wheel. The result is a system that provides the advantages of both a small and large turbocharger, improving flexibility and acceleration, particularly at low engine speeds.

To transfer this power to the road, the new 911 Turbo features a redesigned all-wheel-drive system, with an electronically controlled multi-disc clutch replacing the previous model's viscous clutch. Porsche Traction Management (PTM) allows variable power distribution fore and aft, and depending on conditions, the system's electronics constantly determine optimal torque distribution to ensure ideal traction. In use, PTM provides exceptional agility on winding roads, outstanding traction in inclement conditions, and impressive active safety even at higher speeds. Though powerful, the 911 Turbo's PTM setup is one of the lightest all-wheel-drive systems on the market.

The new 911 Turbo's accelerative performance is duly tempered by its brake system, which is comprised of six-piston monobloc calipers up front, and four-piston monobloc calipers at the rear. Brake disc diameter at all four corners has been increased 20 mm, to 350 mm (13.78 in.). Optional is Porsche's Ceramic Composite Brake system (PCCB). In addition to the exotic pad and rotor material, the PCCB option provides an increased front disc diameter (380 mm /14.96 in.), absolute corrosion resistance, improved fade stability, and a 37-pound unsprung-weight savings versus the standard brake system.

Styling changes made to the new 911 Turbo are evolutionary. The modified front end features tautly drawn cooling air inlets, widely spaced and deep-set fog lights, and new LED indicators situated in the lateral air inlets. From the rear, the Turbo takes on a more powerful stance thanks to a tail 22 mm (0.9-in.) wider than that of the previous model. The redesigned wing spoiler has been aligned to the wider profile, and slopes downward slightly at each end to nestle the rear fender's contours. The lateral air inlets behind the doors have also been redrawn, and together with the new air ducts, afford a more efficient supply of cooling air to the intercoolers.

The 2007 911 Turbo goes on sale this summer in North America.

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