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DSM Glossary of Acronyms and Abbreviations

Posted by wret, Jan 13, 2006

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  1. wret

    wret Proven Member

    Joined Jul 3, 2003
    Bel Air, Maryland
    Members are occasionally confused when they come across an abbreviation that they are not familiar with. I've put together a list of abbreviations, acronyms and jargon I've seen used on tuners to help you. However, new ones are being invented all the time. If you find one that's' not in the list, PM me and I'll add it. -wret

    A/F Gauge : Air/Fuel Ratio gauge. A voltmeter attached to the oxygen sensor signal wire
    A/T : Automatic Transmission
    ABS : Anti-lock Braking System
    AFC : Air-Fuel Converter, an aftermarket tuning computer sold by A'PEXi
    AWD : All Wheel Drive
    BCS : Boost Control Solenoid. What the ECU uses to control turbo boost pressure in the stock setup.
    BISS : Base Idle Adjustment Screw
    BOV : Blow Off Valve. Often used interchangeably with compressor bypass valve (CBV)
    CAS : Cam Angle Sensor
    Cat : Short for catalytic converter
    CBV : Compressor Bypass Valve
    CEL : Check Engine Light
    CHRA : Center Housing Rotating Assembly. The guts of a turbo
    COP : Coil on plug ignition system
    CPS : Crank Position Sensor
    CW : Crank walk
    DOHC : Dual Overhead Cams
    DSM : Diamond Star Motors
    EBC : Electronic Boost Controller
    ECU : Engine Control Unit
    EGR : Exhaust Gas Recirculator. An emission-control system that directs some exhaust gases back into the intake manifold to reduce the formation of nitrous-oxide (NOx) pollutants.
    EGT : Exhaust Gas Temperature.
    EPROM : Erasable Programmable Read-only Memory.
    ET : Abbreviation of the German term 'Einpresstiefe' which translates as 'Insertion Depth.' This term is used interchangeably with "offset" when describing wheel dimensions.
    FAIV : Fast Air Idle Valve
    FCD : Fuel-Cut Defencer
    FMIC : Front Mount Intercooler
    FPR : Fuel Pressure Regulator.
    FWD : Front Wheel Drive
    HID : High-Intensity Discharge. The brighter, bluish lights that are all the rage.
    IAC : Idle Air Control. Also called an ISC (idle speed control)
    IC : Intercooler
    ISC : Idle Speed Controller
    JDM : Japanese Domestic Market
    LCA : Lower Control Arm
    LSD : Limited-Slip Differential
    M/T : Manual Transmission
    MAF : Mass Air Flow, a term usually often used by tuners specifically to describe a chevy type air flow sensor that can replace the stock sensor when used with a MAF Translator or MAFT. Technically the terms MAF and MAS are interchangible
    MAFT : MAF Translator. A device the converts the signal from a chevy hot-wire type MAF to allow it to me used in place of a DSM stock Karmann vortex MAS.
    MAP : MAP sensor or Manifold Absolute Pressure (MAP) sensor
    MAS : Mass Air Sensor, a term usually used to describe the stock Karmann Vortex air flow sensor on a DSM.
    MBC : Manual Boost Controller
    MPI : Multi Port Injection
    NA or N/A : Normally Aspirated
    NT or N/T : Non-Turbo
    OBD : On Board Diagnostics. OBD-I was version 1, OBD-II is version 2.
    OEM : Original Equipment Manufacturer. Usually used to describe parts that came with the car from the manufacturer or their exact replacement.
    PCD : Pitch Circle Diameter. A term used to describe the bolt pattern of a wheel. DSM's have a PCD of 5 x 114.3
    PCV : Positive Crankcase Ventilation. Usually in reference to a PCV Valve which uses vacuum from the intake manifold to draw the fumes from the crankcase.
    PFC : Programmed Fuel Computer (see also PF-CON, FCON)
    PMS : Performance Management System, a piggyback engine management computer made for DSMs and other vehicles
    SAFC : Super Air Fuel (Ratio) Converter. A fuel control device made by Apex'i
    SMIC : Side Mount Intercooler
    SMIM : Sheet Metal Intake Manifold
    SOHC : Single Overhead Cam
    STB : Strut Tower Brace
    TB : Throttle Body
    TCU : Transmission Control Unit
    TOB : Throw Out Bearing
    TPS : Throttle Position Sensor
    TSB : Technical Service Bulletin
    TT : Turbo Timer
    UCA : Upper Control Arm
    UICP : Upper Intercooler Pipe
    USDM : United States Domestic Market
    VPC : Vein Pressure Converter. A fuel management device which replaces the OEM air-flow metering
    WOT : Wide Open Throttle
    Last edited by a moderator: Jun 5, 2014
  2. Defiant

    Defiant DSM Wiseman

    Joined Jan 13, 2003
    glorious Galt, California
  3. dave99gst

    dave99gst DSM Wiseman

    Joined Sep 8, 2002
    plymouth, Michigan

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