Subaru Impreza WRX

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The '''Subaru Impreza WRX''', is a [[turbocharger|turbocharged]] version of the [[Subaru Impreza]], an [[all-wheel drive]] automobile. It is available as a sedan or wagon. The WRX has become a popular choice for [[automobile]] enthusiasts wherever it is sold for its performance and handling.
The '''Subaru Impreza WRX''', is a [[turbocharger|turbocharged]] version of the [[Subaru Impreza]], an [[all-wheel drive]] automobile. It is available as a sedan or wagon. The WRX has become a popular choice for [[automobile]] enthusiasts wherever it is sold for its performance and handling.

Latest revision as of 01:42, 12 February 2009

Subaru Impreza WRX
2002-2003 Subaru Impreza WRX sedan
Automotive industrySubaru
Parent companyFuji Heavy Industries
Production1992–present
AssemblyŌta, Gunma, Gunma, Japan
PredecessorSubaru Legacy RS
Car classificationSport compact
Automobile layoutFront-engine design, symmetrical All wheel drive

The Subaru Impreza WRX, is a Turbocharger version of the Subaru Impreza, an All-wheel drive automobile. It is available as a sedan or wagon. The WRX has become a popular choice for Automobile enthusiasts wherever it is sold for its performance and handling.

Originally introduced in 1992 in Japan, then shortly afterwards in Australia and Europe, the WRX had a turbocharged Flat-4 2.0L (then later a 2.5L), Subaru Boxer engine. Compared to the base Impreza, the WRX has wider low-profile tires, larger brakes, and firmer, higher quality suspension components.

The Impreza WRX was first sold in North America in the 2002 model year.

Contents

GC chassis (1992-2000)


There were 6 noted versions of the WRX. The STI versions were marketed with consecutive numbers. Another way to tell the version of a WRX was to look at the chassis code. All WRX sold between 1992 and 2000 have the beginning chassis code of GC8 then followed by a letter from A to G.

Japan-spec

First generation
1999–2000 Subaru Impreza WRX sedan.jpg
Production1992-2000
Car body style2-door Coupe
4-door Sedan (car)
5-door Wagon
Automobile layoutAWD
Internal combustion engine1.8L Flat-4
2.0L Flat-4
Wheelbase2240 mm (99.2 in)
Length4375 mm (172.2 in)
Width1705 mm (67.1 in)
Height1410 mm (55.5 in)
RelatedSubaru Impreza
Subaru Forester

GC8A (11/1992-9/1993)

The WRX debuted in November 1992 with 240 PS (177 kW) at 6000 rpm with 31 kg·m (304 N·m) at 5000 rpm. Both front and rear brake rotors were ventilated disks. The vehicle had a curb weight of 1220 kg (2690 lb). The center differential was a Viscous coupling type. The rear Limited slip differential was a viscous type. The WRX Type RA (marketing has made usage of the RA acronym in various ways; Record Attempt[1] is the current usage. "R = Racing, A = Group A, the FIA racing class the WRC Impreza competes in" has also been confirmed by Subaru of Japan; the correspondence can be seen on the discussion board for this article) is a stripped down version of the WRX for people to purchase for motorsports. It does not have many "creature comforts" such as air-conditioning or a radio. The car also lacks Anti-lock brakes. The WRX Type RA has the same mechanical specifications as the WRX except it had a weight reduction to 1170 kg (2579 lb). The WRX Type RA steering wheel is a 3 spoke leather-wrapped wheel from Nardi.

GC8B (10/1993-8/1994)

In October, 1993, Subaru introduced the 1994MY WRX which produced 240 PS (177 kW) (236 bhp) at 6,500 rpm with 28.5 kg·m (279 N·m) at 5,000 rpm. The wheels remained the same size. The rear rotors were substituted from drum brakes to solid disk. The vehicle gained 30 kg (66 lb) to a total curb weight of 1250 kg (2756 lb). October 1993 was also the start of production of the wagon version, with 220 PS.

It is also debated whether or not it was just the GF8 Wagon received the 220 PS engine or if the 1994 WRX received it as well. Previously this entry stated the WRX engine was downgraded to 220PS.

GC8C (9/1994-9/1996)

In November 1994, the WRX had a power increase to 260 PS (191 kW) at 6500 rpm with 31.5 kg·m (309 N·m) at 5000 rpm. The wheel diameters were increased to 16 inches and brake rotors were both changed to ventilated disks. With these modifications, the curb weight decreased to 1230 kg (2712 lb). In Japan, the WRX was also offered in the Sport Wagon and was called the Impreza Gravel Express but was discontinued due to very limited sales, and replaced by the Subaru Forester.

The 1996MY WRX debuted on January 1996. The WRX design received minimal mechanical changes, but a WRX V-Limited Edition was introduced to celebrate the success of the Impreza WRC car in the FIA World Rally Championship. It was mechanically the same to the WRX but had a curb weight nudge to 1240 kg (2734 lb). The V-limited cars are painted in World Rally Blue.

GC8D (9/1996-9/1997)

In September 1996, the WRX was updated with new styling. The 1997MY WRX now has a power rating of 280 PS (206 kW) at 6500 rpm with 33.5 kg·m (329 N·m) at 4000 rpm (280 PS at 6500 rpm with 352N*m 4000rpm for the wagon version). The car now weighs 1250 kg (2756 lb).

GC8F (9/1998-9/1999)

The 1999MY WRX is introduced on September 1998. The power rating remains the same as the previous year's model, but the torque is increased to 34.5 kg·m (338 N·m) at 4000 rpm due to improvements on the engine design (the engine was dubbed as Boxer Phase II engine). The car now has a curb weight of 1270 kg (2800 lb). The WRX Type RA receives the same power upgrades and has a weight increase of 20 kg (44 lb) to 1210 kg (2668 lb).

GC8G (9/1999-9/2000)

The last version of the WRX is introduced on September 1999. There is no change in the mechanical specifications. Added features are newly-designed alloy wheels, color-coded mirrors and door handles, remote central locking, intermittent wipers with a timer and map lights. Red Mica had replaced Bright Red..

UK-spec

GC8A (1992)

The WRX was introduced as the Impreza GT (Europe), Turbo 2000(UK). It came with 208 bhp (155 kW).

GC8E (1997)

The Subaru Impreza WRX GT's(Turbo 2000) interior has been updated and the face has been updated.

UK-spec Special Variants

"1.8GL" (1993)

Subaru imported six Type RS's, the development car that led to the stripped-out Type RA. For UK car certification reasons they were registered as 1.8GL's despite having big turbos attached to 2 litre engines. Three cars went to Prodrive; three were retained by Subaru UK and were subsequently sold.

Series McRae UK Version (June 1995)

To commemorate Colin McRae's success in the international rally scene and his 1994 RAC win in particular, Subaru released 200 limited edition 'Series McRae' cars, prepared by Prodrive. These vehicles were finished in a very limited 'Rally Blue' mica colour scheme, sported gold 6.5"x16" Speedline 'Safari' alloy wheels, McRae decals, individual numbered badging from 1-201 (car no. 13 was never built since the number 13 is considered unlucky), and a factory-fitted electric tilt/slide sunroof. Recaro seats were fitted in the front, and the rear seats and side panels were retrimmed in the same Le Mans/Avus material.

On the road price was £22,999.

McRae Owners Club [1]

Catalunya (March 1997)

200 cars (again excluding car number 13) in Black Mica with red flecks riding on gold alloy wheels were made to celebrate winning Subaru's second WRC manufacturer's title at the Rally of Spain (Catalunya). The car was sold for £21,610. A similar car in Blue Mica was sold in Italy.

Turbo Terzo (April 1998)

333 Cars In Blue Mica And Gold Alloys, to celebrate their manufacturer's WRC title. It cost £22,995.

Subaru won a hat-trick of manufacturer championships and celebrated once again by releasing a new special edition Impreza. The Subaru Impreza Terzo (Italian for 3rd). Only 333 Subaru Impreza Terzos were made, as a mark of the three championships won with the Subaru Impreza.

RB5 (1999)

Subaru Impreza RB5

To celebrate the return of British driver Richard Burns to the rally team in car number 5, a limited edition of 444 cars in "Steel Blue" (aka Cool Grey) was created. The basic £24,995 model had little more than cosmetic differences, but most had the WR Sport Performance Pack, an option consisting of a new ECU and exhaust for 240 PS (237 hp/177 kW) and 350 N·m (258 lb·ft) torque. The price for the higher spec car was £27,495. [2]. There was also an optional Prodrive suspension pack that cost extra again. Standard Impreza Turbos could be fitted with the suspension pack and cosmetics to create a 'Prodrive WR Sport'.

Prodrive WR Sport (1999)

The standard Impreza Turbo 2000 was tuned and partly restyled by Prodrive. It featured a Prodrive - exclusive interior, a Prodrive suspension upgrade, Prodrive bodykit and wheels, WR Sport decals and an optional ECU upgrade for increased performance. It sold for £30000.00

P1 (March 2000)

Prodrive upgraded 1000 Imprezas for a price of £31500.00

GD chassis (2001-2007)


Second generation
2004-2005 Subaru Impreza WRX sedan (US)
Production2001-2007
Car body style4-door Sedan (car)
5-door Station wagon
Internal combustion engine2.0Liter 227 Horsepower Flat-4 (2001-05)
2.5L 230 Horsepower Flat-4 (2006-07)
Transmission (mechanics)4-speed Automatic transmission
5-speed Manual transmission
Wheelbase99.4 in (2525 mm)
Length173.4 in (4404.4 mm) (2002-03)
173.8 in (4415 mm) (2004-05)
175.8 in (4465.3 mm) (2006-07)
Width68.1 in (1729.7 mm) (2002-03 & 2006-07 Sedan)
68.5 in (1740 mm) (2004-05 Sedan)
66.7 in (1694.2 mm) (Wagon)
Height56.7 in (1440.2 mm) (Sedan)
58.5 in (1485.9 mm) (2001-05 Wagon)
57.7 in (1465.6 mm) (2006-07 Wagon)
RelatedSubaru Impreza
Subaru Forester
Subaru Impreza WRX STi
Saab 9-2X

In 2001, the Impreza line received a complete update. The chassis received a 120% increase in torsional stiffness. The version nomenclature was dropped from the name. To distinguish between the years, Japanese and other auto-enthusiasts often refer to the chassis as GDA (the WRX had an 'A' where as the STi had a 'B') revision A to G where G is the current (2007) version. The wagon chassis is given a GGA code.

The WRX has received two styling updates. The exterior "bug eyed" styling was widely regarded as somewhat unattractive, so Subaru introduced a mild facelift (often called blob eyes or peanut eyes) of the front end in the 2002 Paris Auto Show. A third update was introduced in mid-2005, including the performance models, with the controversial "jet intake and wings" grille first debuted on the Subaru R1 Kei car, along with new headlights (sometimes referred to as hawk eyes or pig nose and also "vag eye" due to the effect on the grille), taillights, and bumpers. Subaru states that they chose this style to go back to their heritage, paying homage to their grandfathered company, the Nakajima Aircraft Company

Japan-Spec

Rev. A (2000)

August 2000 brings the 2001MY WRX NB sedan. It has an EJ205 with AVCS coupled with an MHI TD04L Turbocharger. The engine produces 250 PS (184 kW) at 6000 rpm with 34 kg·m (333 N·m) at 3600 rpm. The wheels are 16 inch in diameter. The car uses 2 pot/1 pot front and rear brakes. The front brake rotors are ventilated while the rear are solid disks. It has a Torsen rear LSD and a 4.44 final drive ratio. The transmission has close-ratio gears unique to Subaru of Japan at that point in time. The car has a curb weight of 1340 kg (2954 lb).

Rev. B (2001)

The 2002MY WRX NB sedan debuts on September 2001. The mechanical specifications are similar to the previous year's model but the curb weight has been increased to 1350 kg (2976 lb).

Rev. C (2002)

The WRX NB-R sedan is released on November 2002. The power and torque ratings are the same as the previous year. The wheel diameters are increased to 17" in size. The rear brake rotor is changed to a ventilated disk, leaving the car to use only ventilated disks for braking. The car has 4 pot/2 pot front and rear brakes. The rear wing is on wing risers. The car now weighs 1361 kg (3000 lb).

Rev. D (2003)

The WRX line receives a body exterior update and an improved transmission.

Rev. E (2004)

The WRX WR-limited is introduced. The car receives an STI spoiler and an STI front chin. There is a WR-stickered titanium shift knob. The wheels are changed for STI, gold-colored Rays-sourced wheels.

Rev. F (2005)

The WRX has an option to receive the same spoiler as the WRX STI and receives gold 17" x 7" wheels. The WRX has a viscous rear LSD now.

Rev. G (2007)

The car is mechanically the same as the previous Japan-spec revision.

United States-spec

Rev. A (2000)

WRX's initial release date 2000

Rev. B (2001)

North America receives its first Impreza WRX models. They are equipped with an EJ205 engine rated at 227 hp (169 kW) at 6000 rpm with 217 lb·ft (294 N·m) at 4000 rpm. Unlike the Japanese EJ205, the US-spec engine uses a Mitsubishi TD04-13T turbocharger unit. In stock form, it reaches a peak 13.8 psi of boost. The seats are the same as the basic J-spec Impreza. The wheels are cast 16” x 6.5” version of the J-spec WRX NB wheels while the brakes are 2-piston/1-piston front and rear with the front rotors being ventilated disks. 2002 WRXs came with brake duct plates that guided the air in the front bumper vent to the wheel well. The gear ratios are the standard export models, but the final drive is a 3.9:1 ratio. The rear LSD is a viscous coupling type. The steering rack has a ratio of 16.5:1. The 4 gear electronic automatic transmission (4EAT) WRXs have a Variable Torque Distribution AWD system instead of the conventional viscous coupling center differential. VTD employs an electronically controlled hydraulic transfer clutch and a planetary gear center differential to distribute power in a 45:55 split between the front and rear axles under normal circumstances. The VTD system uses multiple sensors to measure front and rear driveshaft speeds, throttle position and gear selection. Then it actively transfers power accordingly between the front and rear wheels for optimum traction and handling. The WRX weighs 3,085 lb (1,399 kg).

Rev. C (2002)

2002–2005 Subaru Impreza WRX wagon

There are few changes from Rev. B. The gears are changed to RA-width gears (1 mm increase in size) to increase durability of the transmission. There is also a valve that prevents “drop-clutch” starts in an effort to reduce the number of shattered gear boxes from abusive AWD launching. The ignition ring is now illuminated with green lighting. Early 2003 WRXs had brake duct plates. At the end of calendar year 2002, the brake duct plates were no longer equipped on the WRXs. A shorter metal fuel pipe and longer connector hose were implemented under the intake manifold to avoid fuel leaks at freezing temperatures.

Rev. D (MY2004)

The WRX received the same Peter Stevens-designed face lift that rest of the Imprezas received. The WRX uses the same contoured seats as the 2004 US-spec WRX STI. The WRX is equipped with multi-phase valve struts to improve ride quality while retaining good handling. Tach is moved to center and speedo is on the right now.

Rev. E (MY2005)

The WRX receives an updated interior, body color rocker panels, black painted headlamp bezels, and wheels that were previously seen on the base US-spec Legacy and a single-port exhaust. Some regular WRX models have an STI hood scoop which is much larger than other WRX scoops. The suspension has also received a few small updates to make handling more efficient compared to the 2004 model.

Note: Saab released its Saab 9-2X, from its 9-2X line, which is essentially a re-skinned Impreza WRX Wagon of the same model year. It is manufactured by Fuji Heavy Industries, Ltd.

Rev. F (2006)

2006-2007 Subaru WRX sedan (US)
2006-2007 Subaru WRX wagon (US)

For 2006 the Subaru Impreza WRX received a complete front-end re-design, boldly styled headlights with smoke-tinted lenses, a three-section mesh-type grill, and distinguished new tail lamp clusters. Three trims levels are available: WRX TR (Tuner Ready), WRX, and Limited. The car’s curb weight is 3,140 lb (1,424 kg) for the WRX TR, 3,192 lb (1,448 kg) for the WRX, and 3240 for the WRX Limited.

The biggest change was the 2.5-liter turbocharged intercooled EJ255 engine, producing 230 hp (172 kW) at 5600 rpm. It replaced the 2.0-liter EJ205 engine used since the WRX model's introduction. The larger-displacement engine produces 235 lb·ft (319 N·m) of peak torque at 3,600 rpm, compared to 217 lb·ft (294 N·m). at 4,000 rpm for the previous WRX. Performance was improved in all speed ranges, with greater emphasis on low-end and mid-range torque. The 2.5-liter WRX engine shares architecture and technology with the WRX STI engine, including Subaru Active Valve Control System (AVCS) variable valve timing technology and an Electronic Throttle Control system. The turbocharger remains the same unit as on the 2002-2005MY US-spec WRXs, but now only peaks at 11.6 psi of boost. The first gear in the transmission received dual-ring synchros to improve downshifts from 2nd to 1st.

2006 Impreza WRX models gained significant chassis and braking system enhancements. Aluminum front suspension lower L-arms reduce unsprung weight to enhance steering response. (The rear suspension gained forward aluminum lateral links in the 2005 model year.) The steering rack was updated for improved steering feel and the steering rack ratio has been changed to 15.0:1. On all WRX models, new 7-spoke 17 x 7-inch aluminum-alloy wheels replace the previous 5 spoke 16 x 6.5-inch wheels. Tires, likewise, are 215/45ZR17 versus 205/55R16 before. The more powerful brake system employs 11.5 in (292 mm) vented front discs and now uses four-piston calipers instead of the previous versions two-piston calipers. The rear brakes are all new, with 11.3 in (287 mm) ventilated discs replacing the previous 10.3 in (262 mm) solid discs, and two-piston calipers replacing single-piston calipers. Painted red and featuring the SUBARU name in white, the calipers also make a strong visual statement.

The horsepower and torque numbers are likely underrated, as shown by multiple independent Dynamometer tests.[2] This is further proven by further comparisons. If the 2005MY US-spec WRX had 217 lb·ft (294 N·m) of torque, then the 2006MY US-spec WRX's 235 lb·ft (319 N·m) should show a minimal amount of increase on the dynamometer. However, tests have shown that a 2006MY US-spec WRX puts out a higher peak torque rating than a 2005MY US-spec WRX with Stage 2 Cobb Tuning (turboback exhaust and engine control unit reflash).[3] Dynamometer tests by Cobb on a base 2006 WRX prove 202hp at the wheels, which upon adding in the 15-20% drivetrain loss doesn't come to the factory claimed power output.

Rev. G (2007)

Ikuo Mori takes the place of Kyoji Takenaka as President and CEO of Fuji Heavy Industries.

As a cost-cutting effort, the WRX has its aluminum suspension reverted to steel-cast pieces. The WRX and Limited trim levels receive an auxiliary audio port next to the cigarette lighter and MP3 CD playback.

A rumor arose from cars101.com that in an effort to reduce torque load on the five speed manual transmission Subaru made the following changes to the gear ratios of the 5-speed manual transmission:

2007: 1st=3.454, 2nd=2.062, 3rd=1.448, 4th=0.880, 5th=0.780, with a 3.0 final drive

2006: 1st=3.454, 2nd=1.947, 3rd=1.366, 4th=0.972, 5th=0.738, with a 3.7 final drive

This information is entirely false. The 5-speed Manual transmission and final drive ratios remain the same from 2006 to 2007. Furthermore, a 3.7 to 3.0 final drive ratio change would rather increase torque load on the transmission.

Asia-spec

Depending on the country, one may be able to buy either Oceania-spec, Europe-spec or US-spec WRXs. There are no models unique to the Asian market outside Japan.

UK-spec

WRX UK300 (2001)

Subaru produced 300 examples of the UK300 to celebrate the rallying success in the UK from the previous years. It featured 18-inch-Prodrive-OZ-wheels in gold, Pirelli Rosso P Zero Tyres, a blue Alcantara Interior, UK300 floor mats, UK300 headlights, UK300 exclusive front and rear spoilers and UK300 decals.

WRX 300 (2005)

300 vehicles limited to the UK market were sold with Blue Mica exterior paint, 17" gold alloy wheels with 215/45 tyres, Subaru World Rally Team branded front bucket seats, a 5-speed manual transmission and the Prodrive Performance Package (PPP) all as standard equipment. The Performance Package increased power to 265 PS and 348 Nm torque and equipped the car with a 0-60 time of 4.9 seconds and a maximum speed of 151 mph. 12 months' free subscription to RAC Trackstar was included in the basic on the road price of £21495.00 (approx. $31800). Considering that the total on the road price of the standard non-limited edition Prodrive Performance Pack equipped Impreza WRX was £21900.00, the WRX 300 represented very good value for money. Optional extras included a 18" P-FF7 wheel and tyre package, a Prodrive brake upgrade (front brakes only), a sports suspension upgrade and a special edition rear spoiler.

RB320 (2006)

Subaru Impreza RB320 at the Nürburgring

In 2006 Subaru UK release the limited edition Subaru Impreza RB320 in honor of the late Richard Burns, who passed away in 2005 from cancer. Richard won the 2001 WRC Championship for SWRT.

The RB320 was available only in Obsidian Black, also features bespoke 18 inch alloy wheels and specially developed Prodrive suspension comprising Bilstein dampers, a sports spring kit with revised rear anti-roll bar and a ride height lowered by 30 mm (1.2 in) at the front and 10 mm (0.4 in) at the rear.

Also standard was a chrome mesh front grille, front lip spoiler, quickshift gearchange, side sill plates and RB320-branded gear knob, carpet mats and exclusive exterior badging. Each owner will also receive an individually numbered black alloy tax disc holder.

The Prodrive Performance Pack (PPP) boosts power to 320 PS (316 hp/235 kW) at 6,000 rpm with torque leaping to 332 lb·ft (450 N·m) at 3,700 rpm. This reduces the 0-60 mph time to 4.8 seconds with a 0-100 mph time of 12.2 seconds.

GB270 (2007)

Subaru produced only 400 cars; 300 4dr saloon versions and 100 5dr hatchback models. The GB270 was available in either WR Blue Mica (4dr) or Urban Grey Metallic (5dr). The name was derived from the 2.5 litre turbocharged engine which produced 270PS and 420Nm of torque. These upgrades meant a 0 to 60mph in 4.9 seconds was possible and 146 mph top speed could be achieved. The top speed of the GB270 was slightly lower than that of other Imprezas because it featured a Prodrive Quickshift 5-speed gearbox which offered faster gear shifts compared to the standard 6-speed gearbox.

Prodrive fitted their upgraded suspension system, lowering height of the car by 30mm at front and 10mm at rear.

A Prodrive anti-roll bar, Prodrive polished stainless-steel mesh front grille, a set of bespoke 18" Prodrive alloy wheels - Silver on 4dr, Black on 5dr were included in the £22,995.00 on the road price.

Oceania-spec

Rev. A (2001)

The WRX has an EJ205 rated at 218 PS (215 hp/160 kW) @ 6000 rpms. It carries 17” x 7” wheels and has 4-piston/2-piston front and rear brakes with ventilated disk rotors all around.

Rev. B (2002)

Due to complaints of slower acceleration in comparison to the GC-chassis WRX, the gear ratios and diff ratio are changed to the same specifications as the Japanese domestic market WRX to improve overtaking and in gear acceleration. The result is near identical first and second gear ratios to the GC, but with a noticeably shorter third, fourth and fifth gear.

Also added was a Suretrac limited slip rear differential. Japanese engineers claimed that drive would still be directed to the gripping wheel even if the other wheel was off the ground.

Rev. D (2004)

The WRX received the same Peter Stevens-designed facelift that rest of the Imprezas received. During 2005 a limited edition Subaru Impreza WRX WRP10 was produced, but limited to 200 vehicles.

Europe-spec

The Prodrive Performance Pack (PPP) is an official accessory for UK GD-chassis WRX's. It evolved from the WR Sport pack fitted to some RB5s. The 2007 version costs £1700 including VAT and fitting, raising power output from 230 PS (227 hp/169 kW) to 270 PS (266 hp/199 kW) and torque to 420 N·m (310 lb·ft).

Rev. A (2001)

The WRX has an EJ205 rated at 218 PS (160 kW) @ 6000 rpms. It carries 17” x 7” wheels and has 4-piston/2-piston front and rear brakes.

Rev. B (2002)

Due to complaints of the slower acceleration of the GD-chassis WRX compared to the GC-chassis WRX, the gear ratios are changed to the same specifications as the Japanese-spec WRX to improve acceleration.

Rev. D (2004)

The WRX received the same Peter Stevens-designed facelift that rest of the Imprezas received. The engine powerplant was improved to 225 PS (165 kW). Some cost reductions were made, such as downgrading the stereo.

Rev. F (2006)

2006: Europe receives WRXs with the EJ255. The power output is 230 PS (169 kW) @ 5600 rpm with 32.6 kg*m (320N*m) @ 3600 rpm. The car weighs 1410 kg (3109 lb). The final drive ratio on this car is 4.111:1. The car also received the same facelift as the other markets.

GC chassis comparison to the GD chassis


Pros

Subaru claims that the GD chassis is 148 percent and 82 percent stiffer in torsional and beam rigidity, respectively, than the GC chassis. This stiffness is primarily due to the addition of a steel "ring" which encircles the cabin at the B-pillar. While the stiffness was increased for passenger safety, it has the added benefit of providing more stability for motorsports events.

In terms of safety, the GD chassis scored much higher than the GC chassis and earned a "Good" rating (highest mark) from the IIHS's offset crash test. 4 stars front driver, 5 star front passenger and 4 star side safety ratings from the NHTSA. In a magazine article from the Dec. 2005 Firehouse magazine (a periodical written and made for firefighters), Ron Moore writes how it is well-known that the Impreza chassis has great protection in its B-pillars. This side structure has 8 layers of high-strength, high-tension steel including a round steel bar running through the middle. The author notes how drivers simply walk away from horrific side-impact accidents.

Cons

The GD chassis gains nearly 200 kg (441 lb) in weight over the GC chassis. Most of this weight comes in the form of chassis stiffening as the car was made to meet every country's crash standards. The weight also hampers the cars maneuverability, transitions and turn-in capabilities. The GC Imprezas were notable for being very lightweight despite having AWD. The WRX Type R STI Version VI using the GC chassis, at 1260 kg (2778 lb), was lighter than the competing Mazda RX-7 type RZ (1270 kg (2800 lb)) and Honda NSX type S Zero (1270 kg). In this fashion, the GC chassis has a better advantage.

The author of the forementioned article also notes that the Jaws of Life need to cut the Subaru's B-pillars at certain points in order to cut through the car frame.[4] This information was not widespread before, so there have been many incidences where firefighters could not cut the B-pillars due to their structural integrity. This may become a concern if the driver or passengers need to be cut out of the vehicle quickly.

GH/GE chassis (2007 - MY08)

Third generation
2008 Subaru Impreza WRX sedan (US)
Production2007-
Car body style4-door Sedan (car)
5-door Hatchback
Automobile layoutFront-Engined All-Wheel Drive
Internal combustion engine2.5Liter 224 Horsepower, 226 ft·lbf (306 Nm) Flat-4; 265 Horsepower, 244 lb-ft
Transmission (mechanics)4-speed Automatic transmission(w/SPORTSHIFT manual mode)
5-speed Manual transmission
Wheelbase103.1 in (2620 mm)
Lengthhatchback: 173.8 in (4415 mm)
sedan: 180.3 in (4580 mm)
Widthsedan: 68.5 in (1740 mm)
Height58.1 in (1475 mm)
RelatedSubaru Impreza
Subaru Impreza WRX STi
2008 Subaru Impreza WRX hatchback (North America)

The Impreza WRX gets a whole new redesign starting from mid-2007 as a 2008 model year. The engine used is still the EJ25. Peak power and torque as the same, but the peak power will output at 5200 rpm (400 rpm lower) and the peak torque delivery will be at 2800 rpm (800 rpm lower)with redline at 6500rpm. The 0-60mph time for the WRX is around 5.6- 5.8 seconds(depends on the source of information), like the predecessor, while decreasing the 50-70mph time due to the improved torque delivery. The transmission is similar to that of the previous models, only the ratios are slightly wider in the low gears with a final drive ratio of 3.9 instead of 3.7. The sedan version has a two exhaust outlets while the hatchback will have one exhaust outlet on the right. The car is based on a shortened Subaru Legacy platform. The front suspension uses a MacPherson strut setup while the rear is a new Double wishbone suspension. The steering ratio will be 15:1. The hood is supported by hydraulic springs instead of a simple rod and hook mechanism. The interior has been updated to imitate the Subaru Tribeca SUV. A new chip computer with average fuel consumption is being introduced for the first time in the Impreza/WRX. The US-spec WRX reverts back to a 2-piston/1-piston sliding calipers (dropping the 4-piston/2-piston fixed caliper setup), but have grown by 0.1inch.in the front and 0.1-0.2inchin the rear with premium package. The calipers and rotor setup are the same found on the BL5-chassis US-spec Legacy 2.5GT and Spec B. The stock wheels are 17" x 7" on 205/50 R17 all season tires. The gas tank has grown from 15.9 gallons(60.2Liter) to 16.9 gal.(64Liter) The car's weight has decreased to 3,142 lb (1,425 kg) for the 5 speed manual and 3,208 lb (1,455 kg) for the 4 speed automatic. The Impreza WRX was sold to the public starting July 2007 as a 2008 model year car in Canada, and was available in August 2007 in the United States. The 2008 Impreza WRC rally car is based on the hatch version of the car. Bluetooth connection is not available. The whole model range of the 2008 Impreza/WRX/STi does not come with sunroof/moonroof.

2008 WRX Spec

  • 2.5L 4-cylinder 224Bhp (Subaru says 246 Bhp) Subaru Boxer Turbo engine
  • All-Wheel-Drive
  • 5-speed manual or 4-speed Semi-automatic transmission racing sports gear shift; Manual transmission/Automatic transmission
  • MacPherson struts front, double wishbone rear suspension
  • Vehicle Dynamics Control (VDC) (Replaces Limited Slip Differential)
  • Brake Assist (ABS)
  • Electronic Brake-force Distribution (EBD)
  • Hill-Holder system
  • 17" 10-spoke aluminum alloy wheels
  • Touch-screen GPS navigation system (optional) [ Not available on Canadian Impreza/WRX models ]
  • 80 watt 4-speaker + 2 Tweeter audio system with single-disc CD player (standard) or 100 watt 10-speaker w/ in-dash 6-disc changer including satellite radio capability (with Premium package)
  • Auxiliary inputs for portable multimedia devices
  • Dual-stage heated front bucket-seats
  • 60/40-split flat-folding rear seats
  • Reinforcement Frame body structure

2009 WRX

For the 2009 model year the WRX will receive a boost of 41 horsepower and 18 lb.-ft of torque to bring the total output to 265 bhp and 244 lb.-ft of torque. In addition, the 2009 model will receive stiffer suspension parts from the STi model, an aerodynamic package and summer performance tires will become standard, and the 5-door hatchback version will feature the rear spoiler and underbody diffuser from the STi. The WRX will be also only available with 5-speed manual transmission. The 4-speed Semi-automatic transmission racing sports gear shift; Manual transmission/Automatic transmission will be available on a new Impreza model called the 2.5 GT, which feature the same 2.5L 4-cylinder 224Bhp (246 Bhp) Subaru Boxer Turbo engine as in the 2008 WRX.[5]

Motorsports

2006 Impreza Rally Car
Stéphane Sarrazin driving a Subaru Impreza WRC on the Monte Carlo Rally
Mock-up of 2008 Subaru Impreza WRC as shown at the 2007 Sydney Motor Show

Subaru Impreza 2007 WRC

Subaru Rally Team revealed the new 2007 Impreza WRC Car on Friday 2nd March with just seven days before the Rally of Mexico. Petter Solberg and Chris Atkinson have big hopes for the new Impreza after their not-so-impressive 2006 season in which they could not even win a single rally. As the teams left their base in England heading towards what will hopefully be a competitive weekend for rally Mexico they released details of the 2007 Impreza that will be competing for the rest of the season.

From the outside the New Impreza doesn’t look that different. Most of the work has been carried out on improving the performance and creating a car with more balanced tyre wear. The team has worked with engineers and designers in Japan focusing on weight distribution, suspension and differential set ups and new dampers have been used to improve road holding.

The work on the new engine has been aimed at weight reduction. The work has included producing a new intercooler design with a turbo air inlet now going through the bonnet scoop. The FIA’s rules about aerodynamics have led to the removal of several apertures on the front and side of the bodywork which have been partially blanked off. The airflow under the bonnet now emerges through air exit holes on the side rather than in the middle of the bonnet.

The Impreza’s hydraulic control of the centre differential has been redesigned to improve its effectiveness and the exhaust has been moved to exit out of the rear bumper. The Subaru team has already started to design the '08 car but no decisions of when it will make its debut have been decided.

FIA

Currently only the higher powered version of the WRX, the WRX STI is homologated for Group N rallying. However, the S9 and newer models of the Impreza WRC car have a GDA chassis code. This fact signifies that the Impreza WRC cars are built off the WRX chassis rather than the STi chassis.

Rally America

In the PGT class the WRX has overall average performance.

2004: The WRX takes third place in PGT class.
2005: The WRX takes first place in PGT class.
2006: The WRX stands in the top 10 positions of PGT class.

SCCA Rallycross

In this new sport, the WRX is a common car found in all of the AWD classes. In 2006, WRX STI takes first and second place in Stock All-Wheel Drive (SA)

Autocrossing

SCCA Solo Events

2002 to 2005MY US-spec WRXs are allowed to compete in D Stock (DS), Street Touring Extreme (STX), E Street Prepared (ESP) and Street Modified (SM) classes.

2006 to 2007MY US-spec WRXs are allowed to compete in D Stock (DS), Street Touring Ultra (STU), E Street Prepared (ESP) and Street Modified (SM) classes.

The 2002 to 2005MY WRXs has been dominating the STX class. Since the inception of the Street Touring Extreme class, the WRX has taken first place at all national Solo competitions.

2002: Tom Hoppe takes a 2002 WRX sedan to a first place finish at the ProSolo Topeka Finale in DS.

2003: At ProSolo Topeka Finale, Keith Casey takes a 2002 WRX wagon to a first place finish in Street Touring Extreme (STX) class. Tom Hoppe takes a 2002 WRX sedan to second place finish in STX at the same event. At the Topeka Solo National Championship, Keith Casey drove his 2002 WRX wagon to first place finish.

2004: At ProSolo Topeka Finale, the 5 top positions in STX are taken by WRXs. Josh Sortor (2002 WRX sedan), Tom Hoppe (2002 WRX Sedan) and Mike King (2004 WRX sedan) took 1st, 2nd and 3rd place respectively. At the TireRack SCCA Solo National Championships, Tom Hoppe (2002 WRX Sedan) and Mike King (2004 WRX sedan) took 1st and 3rd place respectively in STX.

2005: At ProSolo Topeka Finale, Josh Sortor and Mike King take 1st and 3rd place in STX. Josh Sortor takes 1st place in TireRack Solo National Championships in STX.

2006: The top 5 positions in STX at ProSolo Topeka Finale are taken by WRXs. Billy Brooks (2003), Jeff Barco (2005) and Greg McCance (2002) took 1st, 2nd and 3rd place respectively. TireRack Solo National Championships have the top 3 positions in STX taken by Steve O’Blenes (1st), Jeff Barco (2nd) and Chris Fenter (3rd).

Road racing

FIA

Currently only the higher powered version of the WRX, the WRX STI, is homologated for racing.

Open Track Challenge

2002: Gary Sheehan drives a 2002 WRX to win all 7 races in the Unlimited 3 (U3) class and thus win overall in U3. The car places 5th overall.

NASA U.S. Touring Car Championship

2001: Gary Sheehan debuts in a WRX to ultimately gain 2nd place.

2002: Gary Sheehan again drives the TeamSMR WRX to 2nd place.

2003: Gary Sheehan drives his WRX to 2nd place. In its final form under Gary Sheehan, the WRX is equipped with a competition swaybar kit from Hotchkis Tuning, Enkei RPF1 wheels, Cobb Tuning assembled engine, a white Delrin shift knob, C-west body kit, Cusco 35:65 torque split center differential, Kaaz front and rear LSDs, Vishnu Turboback exhaust, DMS50 coilovers, StopTech brakes and other miscellaneous upgrade parts.

2005: Brian Locke of GOTO Racing drives the WRX he purchases from Gary Sheehan to 2nd place. The WRX is refreshed and parts were changed out.

SCCA World Challenge

The WRX is classified in the Touring Car (TC) category.

2005: Irish Mike’s Racing (IMR) begins campaigning a WRX. The car manages a season high of 12th place.

2006: Irish Mike’s Racing campaigns the WRX for 2 races until it is demolished during a practice session. At this point Subaru of America pulls out its contingency funding. IMR pulls from the race due to lack of funding.

2007: Horsepower Research and Development (HRD) is prepping 2 WRXs to run in a few events for this season and the entire 2008 season.

SCCA Club Racing

As stated by the rule book, the 2002MY to 2004MY WRX and 2006MY WRX TR are placed in the Touring 3 category.

Availability

The WRX was originally sold only in Japan. The same year, it was made officially available in Oceania and Europe. In 2001, North America received the first WRX as a GD-chassis for the 2002 model year.

Awards

The US-spec WRX was on Car and Driver magazine's Car and Driver Ten Best for 2002 and 2003. A 2003 US-spec WRX won Best Motoring International's first American Touge showdown.

In 2000 the Australian version of the Subaru Impreza, won the prestigious Australian car award, the Wheels Car of The Year.

In 2006, the EJ25 turbocharged variant engines were awarded International Engine of the Year.[6][7] This engine is also used in the Subaru Forester XT, Subaru Legacy as well as the re-badged Saab 9-2X.

Winner of the 2006-2007 Golden Icon Award (presented by Travolta Family Entertainment) for "Best Sedan".[8]

Footnotes

External links

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