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The EJ20X and EJ20Y engines were equipped with Subaru's ‘Dual Active Valve Control System’ (‘Dual AVCS’) which provided variable intake and exhaust valve timing. The Legacy GT, the EJ20X engine was fitted with a twin-scroll IHI VF38 turbocharger; the EJ20Y engine, however, had a larger twin-scroll Mitsubishi TD04 HLA 19T turbocharger.
The active valve control system (AVCS) is an automobile variable valve timing technology used by Subaru.It varies the timing of the valves by using hydraulic oil pressure to rotate the camshaft, known as "phasing", [1] in order to provide optimal valve timing for engine load conditions.
The CB engine was first introduced in 2020 with the second-generation Levorg. [28] [29] According to Subaru, CB stands for Concentration/Compact Boxer. [30] The first engine in the series is designated CB18, a 1.8 litre dual overhead cam 16-valve engine featuring dual AVCS with gasoline direct injection and a turbocharger. Bore and stroke are ...
Subaru Alcyone VX. Created as a refined luxury engine with improved power over the EA82T, Subaru introduced the ER27 engine in November 1985 for the Subaru ACX-II concept car, shown at the Tokyo Motor Show and billed as the 'concept car of the near future.' [2] The concept went into production as the Subaru Alcyone VX (Subaru XT6 in North America) in August 1987, [3] the exclusive application ...
The US version of the STI includes various departures from the Japanese and European counterparts, such as a turbocharged 2.5-liter EJ257 engine, rather than the twin scroll turbo 2.0 L engine sold elsewhere. All 2006 American Imprezas use some form of the 2.5-liter EJ25 engine since naturally aspirated and turbocharged are available.
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 Intelligence-Active Valve Lift System (i-AVLS) is a valvetrain technology implemented by Subaru in their 2.5 L SOHC naturally aspirated engine to improve emissions, efficiency and performance. Note that AVLS is different from AVCS used on other Subaru engines.
The model marked the return of a turbocharged engine to the North American Legacy, featuring a new turbocharger from IHI coded the VF40, a single scroll turbo which was replaced in 2007 with a VF46 turbo which was slightly better flow with less turbo spool time, and the EJ255 (Years 2005 to 2006 used the EJ257 including the EJ257 heads but kept ...