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February 3, 2006
2002 Subaru Impreza WRXScooby Does
By Maurice Durand
Photography: Greg Jarem, Jeff Koch
The sedan’s styling makes no secret of the car’s aggressive intentions. This driver’s car borrows heavily from the styling cues of the WRC cars. Its widened stance and box flares do not carry over to the turbocharged WRX sport wagon. Subaru’s trademark, a trapezoidal open-mouth front grill opening, remain from the previous Imprezas, and are now flanked by round composite headlights. The headlights lead into a low lying aluminum hood, conceived for superior driver visibility, through which the intercooler ingests wholesale amounts of air. This compact performance sedan package aims to satisfy the discerning driver who is more concerned with the journey than the destination.
The soul of the new WRX, as with previous models, is the compact 2.0L DOHC turbocharged powerplant that was previously unavailable in the U.S. The unit’s small, light, horizontally-opposed layout contribute the WRX’s excellent chassis dynamics and balanced handling. With free-breathing, four-valve-per-cylinder heads, aided by a revised turbocharger and intercooler package, the new U.S.-spec WRX motor yields a stout 227 hp at 6,000 rpm with 217 lb-ft of torque at 4,000 rpm. The open chamber, pent-roof combustion chamber design features centrally-located plugs for improved combustion and detonation resistance. From the factory, the WRX churns out 14.5 psi of boost from a turbo compressor that has been improved with larger turbine and compressor rotors and a larger diameter wastegate port. This engine package is good for 247 hp in Japan. Sure, the U.S. model is down a few ponies from the Japan model, but more stringent emissions standards do take a toll on power. The U.S.-spec rating on the motor is down, due to the fact that 2002 Imprezas must meet the stringent 50-state LEV (Low Emission Vehicle) standard. Meeting this standard required the use of three catalytic converters. A “pre-catalytic†converter is mounted before the turbocharger and begins work during warm-up to help reduce emissions prior to the remaining two converters achieving operating temperatures.
Rest assured, however, that all of the key bottom end and induction ingredients are in place to achieve greater power figures. Backing up the motor, is the proven Subaru all-wheel-drive system. Five-speed Subarus feature a Continuous All-Wheel-Drive system that uses a bevel gear center differential, and a limited slip viscous coupling built into the transmission case. This system yields a 50/50 split of power between front and rear and ensures that the wheel with the best available traction gets the most power. Imprezas equipped with the four-speed-electronically-controlled automatic transmission employ the variable torque distribution all-wheel-drive system. This very advanced automatic transmission integrates an electronically-controlled hydraulic transfer clutch and a planetary gear type center differential that distributes the power between the front and rear wheels.
The 2002 WRX’s suspension system has been revised for greater stability, response, and reduced noise and vibration. The front suspension is derived from a MacPherson strut design that features L-shaped lower control arms that attach to the chassis through vibration damping liquid-filled bushings. The improved geometry of the WRX and RS models (which arrive on U.S. shores with a 20mm wider track) provide added stability while quickening steering response. The WRX sedans push the strut position and wheel hub assemblies outward 10 mm to reduce ground contact angles and reduce body roll. The dual link rear strut suspension uses a trailing link and two vertical links per side in conjunction with a stabilizer bar. The rear suspension crossmember is lighter and stronger than those on the previous generation Imprezas.
Four-wheel ABS disc brakes are standard on a WRX package that is truly an all-season performer. The WRX sedan and wagon come standard with 16×6.5 alloy wheels wrapped in 205/55R16 Bridgestone Potenza RE92 rubber. Dealers will offer tasty options that include a wing, body kit, and 17×7 wheels that ride on 215/45R17 tires.
The targeted price ranges from $25,000-$28,000, making the WRX an exceptional value, considering its turbocharged, all-wheel-drive specification. As a basis for further performance modifications, it’s very likely that the WRX will have no immediate rivals in its price segment. Only time will tell if Subaru’s perceived sport compact sedan market segment will become heavily contested, but Subaru can be very proud of its first salvo fired with the 2002 WRX.
| Engine: |
Aluminum 2.0L, DOHC, 16 valve horizontally opposed four-cylinder powerplant. Turbocharged and intercooled with 14.5 psi of boost.
|
| Bore and Stroke: | 92mm and 75mm |
| Displacement: | 1,994 cc |
| Compression ratio: | 8.0:1 |
| Horsepower: | 227 at 6,000 rpm |
| Torque: | 217 lb-ft at 4,000 rpm |
| Transmission: |
Five-speed manual transmission with full-time viscous coupling continuous all-wheel drive or an electronically-governed four-speed automatic with variable torque distribution all-wheel drive
|
| Final drive ratio with five-speed: | 3.90:1 |
| Track: |
Front: 58.5 WRX sedan, 57.7 inches for wagon, rear: 58.3 for sedan, 57.3 for wagon
|
| Wheelbase: | 99.4 inches |
| Curb weight: | 3,085 pounds (5-speed) |
| Fuel capacity: | 15.9 gallons |
| Suspension: | Tuned four-wheel independent |
| Front: |
MacPherson-type struts with lower L arms riding on liquid-filled bushings, coil springs, and a stabilizer bar with negative scrub geometry
|
| Rear: |
MacPherson struts with coil springs, trailing arms, twin parallel links, and a stabilizer bar with negative scrub geometry
|
| Brakes: |
Power-assisted four-wheel disc with four-channel ABS
|
| Steering: |
Rack and pinion with engine-speed- controlled variable power assist and load sensing valve
|
| Steering ratio: | 16.5:1, 3.0 turns lock to lock |
| Wheels: | 16x.5 aluminum (standard) |
| Tires: | 205/55R16 Bridgestone RE92 |
Source: SuperStreetOnline.Com
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- Author : admin





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