GENERAL REFERENCE

[SUBE555]

[b][size=7]Part 1: General Subaru & Legacy Info[/size][/b] Considering there are generally many questions, what body style is what, what did this model contain, yada, yada, here is some info to explain things. It will be updated as time presents itself and details become available. I will do my best to explain info. If something somehow seems inaccurate, feel free to voice. [b][u]Basic Terminology & Acronyms[/u][/b] 4EAT – Four Speed Electronic Automatic Transmission 5MT – Five Speed Manual Transmission 5EAT – Five Speed Electronic Automatic Transmission (includes Sportshift) 6MT – Six Speed Manual Transmission ABS – Anti-lock Braking System AT – Automatic Transmission ATF – Automatic Transmission Fluid AutoX – Autocross AVCS – Active Valve Control Sysem AVLS – Active Valve Lift System AWD – All Wheel Drive BHP – Brake HorsePower (measured BEFORE transmission) BOV – Blow Off Valve CAI – Cold Air Intake Cat – Catalytic Convertor CEL – Check Engine Light CF – Carbon Fiber CO2 – Carbon Dioxide Diff – Differential DOHC – Dual Overhead Camshaft EBC – Electonic Boost Controller ECT - Electronically Controlled Transmission ECU – Electronic Control Unit (engine control unit) EFI – Electronic Fuel Injection EG – Subaru 6-cylinder engines (up through mid to late 90’s) EG33 – Subaru 3.3 litre 6-cylinder engine code (SVX) EJ – Subaru 4-cylinder engines (early 90’s and newer) EJ20 – Subaru 2.0 litre 4-cylinder engine code EJ205 – Subaru 2.0 litre turbo engine (US WRX) EJ22 – Subaru 2.2 litre 4-cylinder engine code EJ25 – Subaru 2.5 litre 4-cylinder engine code EJ255 – Subaru 2.5 litre turbo engine (US Forester XT, Baja Turbo) EJ257 – Subaru 2.5 litre turbo engine (US WRX STi) EZ – Subaru 6-cylinder engines (post EG series H6 engines) EZ30R – Subaru 3.0 litre 6-cylinder engine code (BL/BP Legacy and new Outback) FDR - Final Drive Ratio FMIC – Front Mount Intercooler FWD – Front Wheel Drive H4 – Horizontally Opposed 4 cylinder (boxer) H6 – Horizontally Opposed 6 cylinder HID – High Intensity Discharge (headlights) JDM – Japanese Domestic Market LSD – Limited Slip Differential MAF – Mass Air-Flow Sensor MAP – Manifold Absolute Pressure Sensor MBC – Manual Boost Controller MIL – Malfunction Indicator Lamp (CEL) MT – Manual Transmission MY – Model Year OEM – Original Equipment Manufacturer RallyX – Rallycross RWD – Rear Wheel Drive SOA – Subaru Of America SOHC – Single Overhead Camshaft TMIC – Top Mount Intercooler TT – Twin Turbo UDP – Under Drive Pulley VDC – Vehicle Dynamic Control VIN – Vehicle Identification Number VTD – Variable Torque Distibution WHP – Wheel HorsePower WOT – Wide Open Throttle [size=2][i]Thanks to Uncle Meat of the Cobb Tuning WRXForum.com[/i][/size] [b][u]JDM (Japanese Domestic Market) Info:[/u][/b] [b]Twin-Turbo:[/b] This is one of the most loosely used term. Everyone wants a twin-turbo because Japan has had it. It was a sequential setup with one turbo used for the low end, while a larger turbo was used for the high end. However, it wasn’t the most optimal solution being its cost, complexity, and between the 1st to 2nd turbo transition, there was a decent dip in power. It has been proven that other solutions are more cost-effective and produce better results in general. More on turbo tech below. [i][b]B4:[/b][/i] The term used for sedan since the 1998 model year. [i][b]B4 RSK:[/b][/i] The name given to the turbocharged sport Legacy Sedan in the 1998 to 2002 model years. Remember, Japan has been even further ahead in model changes. They receive their models 2 model years (or MY) ahead of the U.S. Note: Previous to the BE-generation B4 RSK, the sedan turbo models were called ‘RS’. [i][b]GTB:[/b][/i] The name given to the turbocharged sport Legacy Wagon in the 1993 to 2002 model years that used the sportier Bilstein suspension. [i][b]S401:[/b][/i] The ONLY STi production Legacy to date. This 2003 BE sedan model was produced in a short-run and were rather expensive. It contained much gear from the current year Impreza STi though mostly in drivetrain and brakes. It still retained a sequential twin-turbo setup though with a few more ponies. It also received some suspension modifications including Bilstein struts along with BBS 18x7” wheels. [b][u]Body Styles (by USDM MY):[/u][/b] [i]Sedans[/i] BC (1990-1994) BD (1995-1999) BE (2000-2004) BL (2005-2009) [i]Wagons[/i] BF (1990-1994) BG (1995-1999) BH (2000-2004) BP (2005-2009) [i]Turbochargers for USDM models:[/i] Mitsubishi TD04 - USDM Impreza 2.0L WRX, 2.5L WRX, Forester XT, Baja Turbo IHI VF39 - USDM Impreza WRX STI IHI VF40 - USDM BL/BP Legacy 2.5GT, Outback XT (All are water cooled and use a thrust bearing design, not ball-bearing.)