German Car Zone

Merc1 · 03-20-2008, 02:26 AM

In New York Pontiac unveiled the hottest version of its new G8 sedan, called the GXP. It will become the flagship of Pontiac's performance series — which includes GXP versions of the Solstice, G6 and Torrent — when it goes on sale late this year. The two main differences that make this G8 a GXP are the LS3 V-8 and the optional 6-speed manual transmission.

The 6.2-liter LS3 V-8 (the G8 GT uses a 361-bhp 6.0-liter) is pretty much the same terrific new pushrod small-block found in the 2008 C6 Corvette — one of the very best V-8s ever made. Although horsepower and torque numbers aren't finalized yet, Pontiac estimates the outputs at 402 bhp and 402 lb.-ft. of torque (the torque for the 6-speed manual is estimated at 400 lb.-ft.). The horsepower figure is down 28 to the Vette, but torque is about the same.

Unlike the G8 GT, which is currently available only with an automatic, the GXP can be ordered with the Tremec TR6060 6-speed manual transmission. A Hydra-Matic 6L80 6-speed automatic will come standard. Pontiac estimates the G8 GXP will hit 60 mph in just 4.7 seconds and will run the quarter mile in 13 flat. A limited-slip differential comes standard, as befits a true performance machine. The manual-transmission GXP has a curb weight of 4025 lb.

Pontiac officials say the GXP's suspension system — which is adjustable front and rear — was developed on racetracks all over the world, including Germany's famous Nürburgring. The front features fully adjustable caster, camber and toe, while the rear has adjustable camber and toe. The car rides on 19-in. polished aluminum alloy wheels with summer performance tires, size 245/40R-19; an all-season tire will be available as well. Brembo supplied the GXP with 14-in. vented rotors with 4-piston aluminum calipers up front and 12.8-in. rotors clamped by single-piston calipers at the rear.

The G8 GXP can be differentiated from the regular G8 by a unique front fascia with a lower splitter and a new rear that includes a diffuser. And the hot new wheels that completely fill up the muscular fender flares. Inside are highly bolstered, two-tone sport seats.

ROADandTRACK.com -- Auto Shows - Pontiac G8 GXP (3/2008)

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Merc1 · 03-20-2008, 02:29 AM

PRESS RELEASE

PONTIAC ANNOUNCES THE 2009 G8 GXP

High-Performance Flagship Combines Progressive Design and Powerful Performance

NEW YORK – Today Pontiac announced the flagship of its GXP performance series, the G8 GXP high-performance sedan, at the New York Auto Show. This 2009 model will join the Solstice, G6 and Torrent GXP models in Pontiac dealerships in late 2008. The G8 GXP takes the G8's responsive driving experience, refined passenger environment and aggressive good looks to a new level. It also delivers an enjoyable driving experience, thanks to a 6.2L V-8 that produces in excess of 400 horsepower.

"More than just raw power, the GXP delivers the sophisticated yet exciting driving experience that enthusiasts expect in a car costing far more than the GXP," said Jim Bunnell, Buick-Pontiac-GMC general manager

Engine performance

The heart of the G8 GXP is the 6.2L LS3 small-block V-8, currently rated at 402 horsepower (300 kW)* and 402 lb.-ft. of torque (546 Nm)* pending final SAE certification. This engine is the newest member of GM's small-block V-8 family. It features a revised, larger-bore cylinder block, high-flow, L92-style cylinder heads; larger-diameter pistons; unique camshaft and camshaft timing; revised valvetrain with offset intake rocker arms; high-flow intake manifold; and high-flow fuel injectors.

The LS3 engine has an aluminum cylinder block with cast-in-place iron cylinder liners. Larger bores help create a 376-cubic-inch displacement. The block casting also features revisions and machining in the bulkheads to enhance its strength and improve bay-to-bay breathing. New pistons were designed for high-rpm performance.

New, high-flow cylinder heads aid engine breathing and are based on the large port and valve design found on the LS7 engine and other GM L76 engines. The larger-capacity, straighter intake port-design optimizes intake flow to the combustion chamber, an effect augmented by large valves, measuring 2.16 inches (55.0 mm) on the intake side and 1.59 inches (40.4 mm) on the exhaust side.

Pending final testing, the G8 GXP is expected to deliver 0-to-60 mph performance of about 4.7 seconds, and a quarter-mile time of 13.0 seconds at 108 mph.

Six on the floor

A new six-speed Tremec TR6060 manual transmission is optional on the G8 GXP. This next-generation manual smoothly transfers the engine's power and torque to the rear wheels with a reduction in shift throw. The transmission features a host of refinements including premium gear synchronizers; stronger gears, housing, and bell housing; a single-piece counter shaft; and machined gear teeth.

The standard Hydra-Matic six-speed 6L80 automatic transmission is technologically advanced and robust. It uses a clutch-to-clutch operation and an integrated 32-bit transmission controller to deliver smooth and precise shifts. The six-speed has a generous 6.04:1 overall ratio that enables a "steep" first-gear. The result is strong launch acceleration along with "tall" overdrive ratios that lower engine rpms for better fuel economy and reduced noise.

A 3.27 final drive ratio comes with automatic-equipped GXPs, and a 3.70 gear is matched with the manual transmission. A limited-slip differential is standard.

High-performance suspension

The G8 GXP rides on the G8's 114.8-inch (2915 mm) wheelbase with wide front ( 62.7 inches / 1,592 mm) and rear ( 63.3 inches / 1,608 mm) tracks. The four-wheel independent suspension is fully adjustable and is tuned for the highest performance in the G8 family. The GXP's ride and handling was developed and validated on racetracks and highways around the world, including the famed Nürburgring racing circuit. It rewards the driver with sharp, immediate responses, as well as a well-balanced road feel during spirited driving.

The suspension employs a MacPherson strut design in the front and a four-link, coil-over-shock design in the rear. A direct-acting front stabilizer bar, decoupled rear stabilizer bar and lateral ball joints on the rear suspension deliver increased lateral stiffness for more responsive handling. The front suspension features fully adjustable caster, camber and toe; the rear suspension has fully adjustable camber and toe, for more precise tuning.

Steering and brakes

The steering rate for the GXP is tuned to provide immediate response with definitive driver feedback. Like the G8 sedan and GT, the GXP's steering box is located ahead of the front axle line for a quicker, more direct feel.

The Brembo braking system matches the GXP's boost in performance with an equivalent increase in stopping power. The system includes 14-inch (355 mm) vented front and 12.76-inch (324 mm) rear disc rotors, with special quad-piston alloy calipers in front. The alloy calipers on the rear brakes have single-piston actuation. The four-wheel disc brake system includes standard anti-lock brakes and traction control.

Wheels and tires

The GXP rides on 19-inch polished aluminum wheels with a special machined face. Performance-oriented summer P245/40R19 tires are standard, and a comparable all-season tire is available. Combined with the suspension and steering enhancements, this setup gives the GXP exceptional cornering grip.

Exterior styling

The G8 GXP exhibits strong Pontiac design cues. A unique front fascia with a lower splitter and a distinctive rear fascia diffuser contribute to its sporty look. The dual-port grille, fog lamps, bold wheels and confident, wheels-at-the-corners stance are all unmistakably Pontiac traits.

Interior amenities and comfort

The G8 GXP's interior is driver-oriented with aesthetic and tactile details like instruments with a sporty appearance that match the car's performance. Interior materials consist of satin and chrome trim and high-quality textured materials throughout. The instrument cluster glows with crisp, white light on the primary instruments. Pontiac's signature red lighting illuminates the rest of the instrument panel cluster.

Standard comfort and convenience amenities include:

* Highly bolstered two-tone sport seats with color-coordinated gauge cluster and GXP embroidery
* Leather-trimmed steering wheel and gear shifter
* Power-adjustable front seats
* Fog lamps
* Alloy sport pedals
* A 230-watt Blaupunkt audio system
* XM Satellite Radio

The seats offer firm support to hold occupants in place during aggressive cornering. The standard heated leather seats were designed to deliver excellent comfort during long drives. They are available in Ebony or an Ebony/Red two-tone.

Safety

Maintaining the G8's tradition of a full suite of standard safety features, the G8 GXP includes:

* Four-wheel disc brakes with ABS and traction control
* Electronic stability control
* Seat-mounted thorax air bags and dual-stage frontal air bags for front passengers, with automatic passenger sensing system
* Roof rail side-impact air bags for both seating rows
* OnStar

New York 2008: Pontiac unveils G8 GXP, featuring 50 Cent [w/VIDEO] - Autoblog

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German Car Zone

2009 Pontiac G8 GXP at NYIAS 2008