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2005 Ford Mustang GT-R Concept
 
 
2005 Mustang GT-R Engine
Doug Gaffka’s – design director, Ford Performance Group – design inspiration for the Mustang GT-R was simple: Flex the 2005 Mustang shell to wrap the engine and retain 85 percent of the production car’s solid structure.

"We decided that when a car as good as the 2005 Mustang comes along, we don't need to look much further for a pure race car," he says, noting that the Mustang's shell would be dressing for the engine and roll cage.

The carbon fiber hood instantly communicates the car’s performance – its large engine bulge and unfinished surface harken back to the famous yellow, black-hooded Mustangs.

The front end is a further evolution of the Mustang GT coupe and convertible concepts that stole the 2003 North American International Auto Show and foreshadowed the design of the 2005 Mustang. The Mustang GT-R features the classic pony in the grille, surrounded by modern materials like carbon fiber as well as advanced aerodynamic treatments like ground-hugging front and side splitters.

Accentuated by huge front fender flares that accommodate the racing suspension, the sides of the Mustang GT-R have 20-inch wheels, racing slicks and substantial air scoops. The equally large rear fenders house tires that are an inch wider. Considering how quickly 18- and 19-inch tires became standard racing ware in recent years, these tires are a realistic forecast of the next evolution in racing rubber. Dual stainless steel exhaust tips -- jutting out of the rear body panel just above the rocker panel on both sides in front of the tires – add an intimidating look to the rear of the car.

The classic Mustang rear quarter windows are blocked out to accommodate the fuel delivery "dry-break" system on the driver’s side. The doors are fully functional as required by many of the possible racing classes.

The prominent GT-R logo is placed above the front fender and is flanked by the honorary "Mustang" and "40th Anniversary" words. This logo is repeated on the rear.

Probably the most striking design element, the prominent composite rear spoiler meets several road racing sanctioning body rules.

The rear fascia, like the front, is a further expression of the GT concept design, with a wider taillamp execution. Endurance racers will instantly recognize the differential cooler mounted with an aluminum grille screen between the taillamps.

Inside, the instrument panel preserves the dramatic styling of the 2005 Mustang in a carbon fiber application for racing. In anticipation of another trend, designers chose a Formula One-style steering wheel with most vehicle controls and gauges integrated, including the tachometer, gear selections, telemetry and warning signals. Only the oil pressure and water temperature gauges are located on the instrument panel.

"Most racers cobble together interiors," says Gaffka. "The Formula One-style steering wheel significantly reduces dash gauges to help preserve Mustang’s powerful instrument panel, which is the next evolution of our interior design leadership."

The passenger side houses seat mount tracks for a second seat, if needed, for would-be thrill seekers seeking first-hand Mustang GT-R’s performance experience. The chrome-moly roll cage is attached to all significant points in the body structure, adding significant rigidity to an already stiff body.

The Mustang GT-R’s body retains 85 percent of the production car’s body components that were stiffened by 30 percent as part of the Mustang’s first full makeover ever. The only modifications include rear-mounted battery pods and a fuel cell relocated to the rear trunk.

Built at Saleen Special Vehicles in Troy, Mich., the car was developed by the same members of the Ford GT "Dream Team" who are building sub-assemblies and painting body panels for Ford’s first supercar.

The "Five Liter" Is Back

The foundation for the Mustang GT-R's race-prepared 440-horsepower engine is the new 5.0-liter "Cammer" crate engine from Ford Racing Performance Parts. The engine is rooted in the MOD 4.6-liter four-valve V-8 engine family. However, the motor's flanged cylinder liners help provide 94mm (instead of 90.2mm) cylinder bores, creating a full 5.0 liters of piston displacement.

And while the motor employs the SVT Mustang Cobra’s forged crankshaft with six-bolt mains and Manley "H-Beam" connecting rods for superior strength, the high-strength Ford Racing block features design reinforcements and a revised material for added strength and high-output durability. The block is specially reinforced in the crankcase web areas for high torque loads.

Other key differences include forged pistons, an 11.0:1 compression ratio, ported heads, higher-lift cams and beehive-shaped valve springs. The crate engine also features higher-flow fuel injectors and a magnesium, variable-geometry intake manifold.

The 5.0-liter "Cammer" engine comes with a custom oil pan and features custom-fabricated Tri-Y headers and crossover.

Helping put the power to the ground is the Ford Racing-supplied TTC T-56 six-speed transmission linked to the engine through a heavy-duty clutch and flywheel assembly. Power exits the transmission through a custom metal matrix composite aluminum driveshaft into a race-specification differential with a 4.56:1 final drive ratio.

The "Cammer" was introduced at the Specialty Equipment Manufacturers Association show in 2002. The engine in the GT-R is identical to the crate engine, with the exception of camshaft timing, which was modified to produce more high-end horsepower for track use.

 
 
 
Source: Ford Motor Company
 
 
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