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The only tuned-by-STI engines that have been in the standalone WRX STI are the EJ257 (Export) and EJ207 (JDM only) specifications of the Subaru EJ engine. (Although earlier Impreza -based models were also fitted with the EJ22G Boxer Turbo )) The highest output model of EJ25 ever produced, producing up to 341 hp (346 PS; 254 kW) at 6,400 rpm and ...
The Subaru EJ engine is a series of four-stroke automotive engines manufactured by Subaru. They were introduced in 1989, intended to succeed the previous Subaru EA engine . The EJ series was the mainstay of Subaru's engine line, with all engines of this series being 16-valve horizontal flat-fours , with configurations available for single, or ...
For the first time in a Subaru engine, the centerlines of the cylinder bores do not intersect with the crankshaft axis to reduce friction during the piston downstroke; instead, there is a crank offset of 8 mm (0.31 in). Overall thermal efficiency is 40% due to the adoption of lean-burn combustion with an excess air ratio (λ) of 2. [32]
Don't judge it by its looks. Judge it by its sound.
The Subaru Impreza WRX STI is high performance specification model of the Subaru Impreza compact car line, manufactured by Japanese automaker Fuji Heavy Industries Subaru. In 1988, FHI created Subaru Tecnica International (STi) as a its motorsport division to develop and compete in the FIA World Rally Championship and other motorsports activities.
The WRX STI retains the EJ engine from the previous generation STI (2.0-litre EJ207 for Japanese models, 2.5-litre EJ257 for international models), with dual AVCS. However, it is equipped with modifications to the ECU which have increased fuel economy, and has given a slight boost in power.
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