Japan-spec |
2000
Subaru Impreza WRX Rev. A
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August 2000
brings the 2001 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 (246 ft·lbf, 333
N·m) at 3600 rpm. The wheels are 16-inch (410 mm) 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 1,340 kg (2,954 lb).
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2001
Subaru Impreza WRX Rev. B
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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 1,350 kg (2,976 lb).
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2002
Subaru Impreza WRX Rev. C
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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 1,361 kg
(3,000 lb).
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2003
Subaru Impreza WRX Rev. D
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The WRX
line receives a body exterior update and an improved transmission.
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2004
Subaru Impreza WRX Rev. E
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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.
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2005
Subaru Impreza WRX Rev. F
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The
third update was made in mid 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.
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2007
Subaru Impreza WRX Rev. G
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The car
is mechanically the same as the previous Japan-spec revision.
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US-spec
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2000
Subaru Impreza WRX Rev. A
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The Subarus
WRX's initial release date in the U.S was 2000
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2001
Subaru Impreza WRX Rev. B
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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 14.7 psi (1.0 bar) 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).
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2002-2003
Subaru Impreza WRX Rev. C
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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 2002 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.
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2004
Subaru Impreza WRX Rev. D
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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.
The tachometer was moved to center, and the speedometer was
moved to the right.
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2005
Subaru Impreza WRX Rev. E
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The WRX
received 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 WRX
models have an STI hood scoop that 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.
Cassette players in the stereo system were no longer offered.
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2006
Subaru Impreza WRX Rev. F
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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 produced 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 shared architecture
and technology with the WRX STI engine, including Subaru Active
Valve Control System (AVCS) variable valve timing and an Electronic
Throttle Control system. The turbocharger remained the same
unit as on the 2002-2005MY US-spec WRXs, but peaked at 14.8
psi (1.0 bar) of boost. The first gear in the transmission received
dual-ring synchros to improve downshifts from 2nd to 1st and
reduce notchiness.
2006
Impreza WRX models gained some chassis and braking system enhancements.
On sedan models, aluminum front suspension lower A-arms reduced
unsprung weight. (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
was been changed to 15.0:1. On all WRX models, 7-spoke 17 x
7-inch (180 mm) aluminum-alloy wheels replaced the previous
5 spoke 16 x 6.5-inch (170 mm) wheels. Tires were 215/45ZR17
versus 205/55R16 before. The more powerful brake system employed
11.5 in (292 mm) vented front discs and four-piston calipers
instead of the previous versions two-piston calipers. The rear
brakes were 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. The calipers are painted red
with the SUBARU name in white overlain.
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2007
Subaru Impreza WRX Rev. G
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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.
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