2006-2007 Subaru WRX (US)
Rev. F (2006)
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 (180 mm) aluminum-alloy wheels replace the previous 5 spoke 16 x 6.5-inch (170 mm) 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 202 hp (151 kW) 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.
)
