Defining the Acronyms
05-29-2006, 09:42 PM
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Defining the Acronyms
All the acronyms can be confusing. The folowing is a list of ever growing accronyms and other compnents commonly referred to defined. If you have a question about something, or would like to see something else defined in the list, please feel free to PM myself or post a reply in the thread. Please, do not post anything other than direct questions to the content of the original post (read, this post) in the follwoing threads. If you would like to discuss the meaning or in greater detail the meaning, start a new thread.
torque converter - device coupled between the engine and the transmission; commonly referred to as a converter, and incorrectly as 'stalls'.
TDC - Top Dead Center - When the piston is at the very top of it's travel
BDC - Bottom Dead Center - When the piston is at the very bottom of it's travel
CR - Compression Ratio - the amount the fuel/air mixture is compressed in the cylinder when the piston comes to TDC
cc (lower case) - Cubic Centimeters - a measure of volume; common uses are combustion chamber size, piston volume, head ports
CC - Combustion Chamber - a section of the head where the valves reside, section is above the piston when mounted on the engine; area in which the fuel air mixture is compressed and finally ignited
ci - cubic inches - a measuring of volume, often for motor displacement, i.e. 325ci, 408 ci
NOS - Nitrous Oxide Systems - a company that manufactures nitrous parts and accesories, not the actual spray in itself.
n2o - The formula abbreviation for nitrous oxide. This is the stuff that's put in the bottle
PCM - Powertrain Control Module - The computer that runs the powertrain, engine, transmission, and emissions.
MIL - Malfunction Indicator Light - Fancy name for the Check Engine light
SES - Service Engine Soon - Check Engine light
BCM - Body COntrol Module - The computer module that runs all the body functions such as, seat belt lights, ABS, etc.
A/F - Air/Fuel Ratio - The ratio of the mixture of air and fuel
AFR - Same as above, also AFR heads, where AFR stands for AirFlow Research
TB - THrottle Body - part that sits in front of the intake, has the throttle blade in it, controls airflow into the engine
DBW - Drive By Wire - A throttle that does not have a throttle cable, it's all electronic. All 03-up GM trucks have this.
WOT - Wide Open Throttle - Self explanitory
CAI - cold air intake - intake designed to increase the amount of COLD air entering the engine by shielding the hot air in the engine compartment
MAF - mass air flow sensor - engine electronics to measure amount of airflow into the engine
IAC - idle air control valve - engine electronics designed to keep a steady idle by adjust the air flow AROUND the throttle blade
RCSB - regular cab short bed - self explanitory
ECSB - extended cab short bed - self explanitory
CCSB - crew cab short bed - self explanitory
LB - long bed - self explanintory
HID - high intensity discharge - type of extremely bright driving lights that are normally blue in appearance
P&P - port and polish - work done to heads to increase flow
SBC - small block chevrolet engine - 289 - 427 old skewl power
BBC - big block chevrolet - 396 - 502 old skewl power
S/C - supercharger - Belt driven devide that adds boost.
T/C - turbocharger - Exhaust driven device that adds positive manifold pressure (boost)
DD - Daily Driver - saying designated for a vehicle which you use fr day to day purposes.
NA- Naturally aspirated - not using any powere adders (i.e. Nitrous or forced induction)
OBS- Old body style - designated for early 99 and older trucks
NBS- New body style - Designated for late 99 to current trucks.
MAP - Manifold Absolute Pressure (Sensor) - sensor to read vacuum
EGR - Exhaust Gas Recirculator - Emissions Device Pre '02 - recirculates exhaust gases to reduce emmisions
VSS - Vehicle Speed Sensor - sensor to read vehicle speed for the speedometer
TCC - Torque Convertor Clutch - clutch in the converter to make it a 1:1 ratio
CAGS - Computer Aided Gear Selection - in M6 Transmissions, 1-4 shift, aka Skip Shift
FMC - Force Motor Current - Table that Defines Line Pressure characteristics for automatic transmissions
DTC - Diagnostic Trouble Code - codes that are stored in the PCM
FPR - fuel pressure regulator - devide to regulate the fuel pressure, mounted on the fuel rail in a stock application
PCV - positive crankcase ventilation - emmisions device take the fumes from the engine into the intake manifold for consumption
ORY - Off Road Y pipe - a Y pipe designed to replace the original one with no catalytic converters
Tuning Related Acronyms:
OL - Open Loop [Mode of Operation]
CL - Closed Loop [Mode of Operation]
OLSD - Open Loop, Speed-Density [Mode of Operation]
PE - Power Enrichment [Mode of Operation]
DFCO - Deceleration Fuel Cut-Off [Mode of Operation]
VE - Volumetric Efficiency [Table]
IFR - Injector Flow Rating [Table]
TM - Torque Management
LTFT - Long Term Fuel Trims
STFT - Short Term Fuel Trims
RAF - Running Airflow (Idle Airflow)
LTIT - Long Term Idle Trim
STIT - Short Term Idle Trim
KR - Knock Retard
torque converter - device coupled between the engine and the transmission; commonly referred to as a converter, and incorrectly as 'stalls'.
TDC - Top Dead Center - When the piston is at the very top of it's travel
BDC - Bottom Dead Center - When the piston is at the very bottom of it's travel
CR - Compression Ratio - the amount the fuel/air mixture is compressed in the cylinder when the piston comes to TDC
cc (lower case) - Cubic Centimeters - a measure of volume; common uses are combustion chamber size, piston volume, head ports
CC - Combustion Chamber - a section of the head where the valves reside, section is above the piston when mounted on the engine; area in which the fuel air mixture is compressed and finally ignited
ci - cubic inches - a measuring of volume, often for motor displacement, i.e. 325ci, 408 ci
NOS - Nitrous Oxide Systems - a company that manufactures nitrous parts and accesories, not the actual spray in itself.
n2o - The formula abbreviation for nitrous oxide. This is the stuff that's put in the bottle
PCM - Powertrain Control Module - The computer that runs the powertrain, engine, transmission, and emissions.
MIL - Malfunction Indicator Light - Fancy name for the Check Engine light
SES - Service Engine Soon - Check Engine light
BCM - Body COntrol Module - The computer module that runs all the body functions such as, seat belt lights, ABS, etc.
A/F - Air/Fuel Ratio - The ratio of the mixture of air and fuel
AFR - Same as above, also AFR heads, where AFR stands for AirFlow Research
TB - THrottle Body - part that sits in front of the intake, has the throttle blade in it, controls airflow into the engine
DBW - Drive By Wire - A throttle that does not have a throttle cable, it's all electronic. All 03-up GM trucks have this.
WOT - Wide Open Throttle - Self explanitory
CAI - cold air intake - intake designed to increase the amount of COLD air entering the engine by shielding the hot air in the engine compartment
MAF - mass air flow sensor - engine electronics to measure amount of airflow into the engine
IAC - idle air control valve - engine electronics designed to keep a steady idle by adjust the air flow AROUND the throttle blade
RCSB - regular cab short bed - self explanitory
ECSB - extended cab short bed - self explanitory
CCSB - crew cab short bed - self explanitory
LB - long bed - self explanintory
HID - high intensity discharge - type of extremely bright driving lights that are normally blue in appearance
P&P - port and polish - work done to heads to increase flow
SBC - small block chevrolet engine - 289 - 427 old skewl power
BBC - big block chevrolet - 396 - 502 old skewl power
S/C - supercharger - Belt driven devide that adds boost.
T/C - turbocharger - Exhaust driven device that adds positive manifold pressure (boost)
DD - Daily Driver - saying designated for a vehicle which you use fr day to day purposes.
NA- Naturally aspirated - not using any powere adders (i.e. Nitrous or forced induction)
OBS- Old body style - designated for early 99 and older trucks
NBS- New body style - Designated for late 99 to current trucks.
MAP - Manifold Absolute Pressure (Sensor) - sensor to read vacuum
EGR - Exhaust Gas Recirculator - Emissions Device Pre '02 - recirculates exhaust gases to reduce emmisions
VSS - Vehicle Speed Sensor - sensor to read vehicle speed for the speedometer
TCC - Torque Convertor Clutch - clutch in the converter to make it a 1:1 ratio
CAGS - Computer Aided Gear Selection - in M6 Transmissions, 1-4 shift, aka Skip Shift
FMC - Force Motor Current - Table that Defines Line Pressure characteristics for automatic transmissions
DTC - Diagnostic Trouble Code - codes that are stored in the PCM
FPR - fuel pressure regulator - devide to regulate the fuel pressure, mounted on the fuel rail in a stock application
PCV - positive crankcase ventilation - emmisions device take the fumes from the engine into the intake manifold for consumption
ORY - Off Road Y pipe - a Y pipe designed to replace the original one with no catalytic converters
Tuning Related Acronyms:
OL - Open Loop [Mode of Operation]
CL - Closed Loop [Mode of Operation]
OLSD - Open Loop, Speed-Density [Mode of Operation]
PE - Power Enrichment [Mode of Operation]
DFCO - Deceleration Fuel Cut-Off [Mode of Operation]
VE - Volumetric Efficiency [Table]
IFR - Injector Flow Rating [Table]
TM - Torque Management
LTFT - Long Term Fuel Trims
STFT - Short Term Fuel Trims
RAF - Running Airflow (Idle Airflow)
LTIT - Long Term Idle Trim
STIT - Short Term Idle Trim
KR - Knock Retard
Last edited by Flyer; 12-26-2006 at 08:47 PM.
05-04-2007, 02:04 AM
#6
IBPW - Injector Base Pulse Width
PID - Proportional-Integral-Derivative (http://en.wikipedia.org/wiki/PID_controller)
SRT - System Readiness Test
MBT - Minimum Best Torque - Minimum spark advance that yields the best torque output
PID - Proportional-Integral-Derivative (http://en.wikipedia.org/wiki/PID_controller)
SRT - System Readiness Test
MBT - Minimum Best Torque - Minimum spark advance that yields the best torque output
05-04-2007, 10:53 AM
#7
Originally Posted by dc_justin
PID - Proportional-Integral-Derivative (http://en.wikipedia.org/wiki/PID_controller)
That sounds WAY to complicated
I always thought PID stood for "Parameter Identification"
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05-04-2007, 11:50 AM
#8
Originally Posted by kbracing96
That sounds WAY to complicated
I always thought PID stood for "Parameter Identification"
I always thought PID stood for "Parameter Identification"
If you read through though, sounds like it could make sense, as that wiki discusses closed loop control systems...
05-05-2007, 09:30 AM
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Originally Posted by dc_justin
PID - Proportional-Integral-Derivative (http://en.wikipedia.org/wiki/PID_controller)
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