Originally Posted by http://fm.no-ip.com/Car/mdictionary.html

Alphabet Soup & Vehicle Identification
Alphabet Soup
RX-7 Nicknames
As is highlighted in the serial number analysis:

SA - 1979-1980 US
FB - 1981-1985 US
FC - 1986-1991 US
FD - post-1991 US
FE - RX-8 US

Others

GTR - 186 HP Turbo 2
GTX - 200 HP Turbo 2
T2 - Turbo 2
13B-REW - Twin turbo 13B

Basic Production Mazda Rotary Engine Types

10A - 0982 cc, 2 60 mm wide rotors, carbureted
12A - 1146 cc, 2 70 mm wide rotors, carbureted
13A - 1310 cc, 2 rotors, carbureted
13B - 1308 cc, 2 80 mm wide rotors, carbureted or EGI
20B - 1962 cc, 3 80 mm wide rotors, EGI

Other Rotary Acronyms

ABS - Anti-lock Braking System
ABSV - Air Bypass Solenoid Valve
ACV - Air Control Valve
ATS - Air Temperature Sensor
AWS - Accelerated Warm-up System
BAC - Bypass Air Control valve
BOV - Blow Off Valve
CAS - Crank Angle Sensor
DEI - Dynamic Effect Intake (DEI FC engine)
ECU - Electronic Control Unit (engine computer)
EGI - Electronic Gasoline Injection
EGR - Exhaust Gas Recirculation
EGT - Exhaust Gas Temperature
EVC - Electronic (boost) Valve Controller
FCC - Fuel Cut Controller
FCD - Fuel Cut Defenser
FPR - Fuel Pressure Regulator
LSD - Limited Slip Differential
MBC - Manual Boost Controller
MSP-RE - Multi Side Port Rotary Engine
NA - Naturally/Normally Aspirated (non-turbo)
N/A - Not Applicable
OBD - On Board Diagnostic system
OBDII - OBD2 - On Board Diagnostic system, 2nd generation
OEM - Original Equipment Manufacturer
OMP - Oil Metering Pump
PEG - Popular Equipment Group
PEP - Preferred Equipment Package (slang for PEG)
RB - Racing Beat
REPU - Rotary Engined Pick-Up truck
RICE - Rotary Internal Combustion Engine
RTV - Room Temperature Vulcanizing silicone sealer
TK - Toyo Kogyo, Mazda prior to name change
TPS - Throttle Position Sensor
TSB - Technical Service Bulletin
VDEI - Variable Dynamic Effect Intake
WOT - Wide Open Throttle
Did I miss any? Email Felix.
Rotary Glossary

Vehicle Identification
FAQ - Which model RX-7 do I have?
Wonder what model or year your RX is?
Pre-RX-7 Rotary VIN ID US

Vehicle Years VIN Prefix
R100 1970-72 M10A
RX-2 1971-74 S122
RX-3 1972-77 S124
RX-4 1974-78 LA23
Cosmo 1976-78 CD23
REPU 1974 PA136
REPU 1975 SPA136
REPU 1976 PA136
REPU 1977 PA236
VIN Detail for RX-7 US

1979-1980
SA22C500025 (first US bound production vehicle)
SA2 - model code RX-7 1979-1980
2 - engine code 2=12A
C - body code C=coupe
500025 = serial number
1981-1995
JM1FB332XF0873069 (example - 1985 GSL-SE)
JM1 - manufacturer Mazda passenger car
FB - car line FB=RX-7 (see list)
33 - body style code (35=convertible)
2X - engine ID code (number, see below) & alphanumeric check digit
F - model year code (See list)
0 - plant 0=Hiroshima
873069 - serial number
For car line from above
FB= 1981-1985 models
FC= 1986-1991 models
FD= 1993-1995 models
FE= RX-8
For engine code from above
1= 12A, 1981-1985 models
2= 13B, 1981-1985 models
1= NA, 1986-1991 models
2= Turbo, 1987-1991 models
1= 1993-1995 models
For model year code from above
B=81
C=82
D=83
E=84
F=85
G=86
H=87
J=88
K=89
L=90
M=91
P=93
R=94
S=95

Production Numbers US

Model Year Prod Dates Starting Serial #
1979 78/03-79/06 500025
1980 79/06-80/06 568503
1981 80/07-81/05 500010
1982 81/05-82/06 600001
1983 82/07-83/10 700001
1984 83/09-84/07 800001
1985 84/07-85/05 850001
1986 n/a 100001
1987 n/a 500001
1987 Turbo n/a 130378
1987 n/a 600001
1988 Convertible n/a 100001
1989 n/a 700001
1990 n/a 800001
1991 n/a 900001
1993 n/a 200001
1994 n/a 300001
1995 n/a 400001
This is primarily from a Mazda Parts Price Book.

For UK RX-7 *

August 1979-May 1981
JMZSA22C00650001
JMZ - manufacturer identification=Mazda
SA2 - model code SA2=RX-7
2 - engine code 2=12A
C - body code C=coupe
00 - factory code 00=Hiroshima
650001 - serial number
May 1981 - March 1986
JMZFB131200700001
JMZ - manufacturer identification=Mazda
FB1 - model code FB=RX-7
3 - body code 3=2 Door Coupe
1 - engine code 1=12A
2 - transmission code 2=manual 5-speed
00 - factory code 00=Hiroshima
700001 - serial number
* As listed in the Official Mazda Dealers Manual (1993/03)

Japanese VIN Model Codes

SA122C - Initial 1st generation
FB3S - Later 1st generation
FC3S - 2nd generation
FD3S - 3rd generation

RX-7 Model subtypes and years produced
For US RX-7
Model Years
S 1979-85
GS 1979-85
10th Anniversary 1980
Leather Sport (LS) 1980
GSL 1981-85
Limited Edition 1983
GSL-SE 1984-85
GXL 1986-91
LX
Sport
Turbo II 1987-91
Convertible 1988-91
GTU 1988-89
10th Anniversary 1988
GTUs 1989-90
R1 1993
R2 1994-95
Touring 1993-95
For UK RX-7
Model Years
Mk1 August 1979 - May 1981
Mk2 May 1981 - March 1984
Mk3 April 1984 - March 1986

Weights by year and model *

1st gen RX-7
79 4-speed calif, or federal S model 2350
79 5-speed calif, or federal GS model 2385
79 automatic calif, GS model 2410
79 automatic federal, GS model 2420
82 GSL, 4-port 13B, Racing Beat street port exhaust, Holley intake, A/C, 2385
84 GSL-SE, 4-port 13B, Racing Beat street port exhaust, OEM SE EGI intake, A/C, 2537

* Accessories like air add weight. For specific breakdown and extras for each year you should refer to "Illustrated MAZDA Buyers Guide" by John Matras, Motorbooks International, 1994. Excellent guide for any Mazda or RX-7 enthusiast.

An often asked question is why a GSL-SE weighs so much more than a GSL. If you actually compare two using the same scale, you'll probably find that the difference is smaller than published specs indicate. Official published weights are for the cars as shipped from Japan. All GSL-SE's were shipped with factory installed air conditioning, so this is included in published specs. All 12A cars were lumped together for weight publication except for transmission distinction. Most of these cars were shipped from Japan without air conditioning, and many without sunroof. The published weights reflect this. Most 12A cars with air conditioning had it installed either by Mazda at its US ports of entry before distribution to dealers, or by dealer technicians prior to delivery to customers.

Actual weight difference between GSL-SE and 12A models reflects in largest part whether the car has air conditioning. The larger wheels, tires and brakes make up the second largest difference. The larger engine does weigh roughly 20 lbs more, making the third largest difference. The removable roof panel and its protective cover weigh 13 lbs. The fixed portion of the roof structure to accomodate the removable panel weighs little different from the non-sunroof models in spite of the hole with panel removed.
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