FC Specifications List

[My5ABaby]

Here's a list I compiled using some RX-7 books on specifications of a new RX-7. These are mostly based on Yamaguchi's (1986) book.

Internal Project Code
P747

Steering
Rack and Pinion
- Steering Ratio = 20.3:1
-3.6 turns lock-to-lock
Power
- Steering Ratio = 15.2:1
- 2.7 turns lock-to-lock
- U-Turn Length = 9.8 m (32.2 ft)

Steering Wheel
Outer Diameter = 380 mm
Offset Downward = 5 mm (0.2 in)

Transmission
M Type (N/A)
- Clutch inside diameter = 150 mm (5.59 in)
- Clutch outside diameter = 225 mm (8.86 in)
- 1st = 3.475:1
- 2nd = 2.002:1
- 3rd = 1.366:1
- 4th = 1.000:1
- 5th = 0.711:1
- Reverse = 3.493:1
- Final Drive = 4.100:1
- 1st ---> 2nd Synchronizer Diameter = 65 mm (2.45 in)
R Type (Turbo)
- Clutch inside diameter = 160 (6.3 in)
- Clutch outside diameter = 240 mm (9.4 in)
- 1st = 3.483:1
- 2nd = 2.015:1
- 3rd = 1.391:1
- 4th = 1.000:1
- 5th = 0.762
- Reverse = 3.288:1
- Final Drive = 3.909:1 (4.100:1 optional)
- 1st ---> 2nd Synchronizer Diameter = 76 mm (2.99 in)
- 2nd ---> 3rd Synchronizer Cone Diameter = 65 mm (2.45 in)
Automatic (JATCO L4N71B) 4 Speed
- Torque Converter Ratio = 2.0:1
- 1st = 2.841:1
- 2nd = 1.541:1
- 3rd = 1.000:1
- 4th = 0.720:1
- Reverse = 2.400:1
- Final Drive = 3.909:1
Propeller Shaft
- N/A = 782 mm (30.8 in) long, 75 mm (2.95 in) thick
- Turbo = 774 mm (30.7 in) long, 74 mm (2.95) outside diam., 62.5 mm (2.46 in) inner diam.
- Automatic = 733 mm (28.9 in) long, 57 mm (2.24 in) thick


Body
Wheelbase = 2430 mm (95.7 in.) long
Front Track = 1450 mm (57.1 in) wide
Rear Track = 1440 mm (56.7 in) wide
Overall Length = 4290 mm (168.9 in.)
Overall Width = 1690 mm (66.5 in.)
Overall Height = 1265 mm (49.8 in.)
Curb Weight = 1190.5 kg (2625 lb) manual, 1225 kg (2695 lb) 2 seat auto, 1232 kg (2715 lb) auto 2 + 2
Weight Distribution
- Unladen = 51.2/48.8, front/rear
- 2 passengers w/ a full tank = 50.2/49.8, front/rear

Timeslips
N/A: 8.0 sec. 0-60, 16.1 1/4th mile, 128 mph top speed
Turbo: 6.7 sec. 0-60, 15.2 1/4th mile, 150+ mph top speed

Windshield
63.5 degree angle

Air Dam
Ramp Angle: 14 degrees

Hatch
Glass: 18.5 degrees to the horizontal
Cargo area lift-over height: 120 mm to 910 mm (35.8 in.)

Doors
Apertures: 1370 long x 970 mm high (53.9 x 38.2 in.)

Form Drag Coeff., Front Lift, Rear Lift, Frontal Area, Aerodynamic Drag Coeff.
Cd = 0.31 base (0.29 aero kit)
Clf = 0.08
Clr = 0.14 (0.07 aero kit)
A = ~2800 in^2
Cd x A = 0.56 (.524 aero kit)

Internal Engine Dimensions
Generating Radius (R) = 105 mm (4.13 in.)
Eccentricity (e) = 15 mm (.59 in.)
Trochoid Housing Width (b) = 80 mm (3.15 in.)
K Factor = 6.8
Displacement = 654 cc/chamber (1308 cc total)
Piston Engine Displacement Equivalency = 2616 cc (V = (3) (sq rt 3)(Reb))

Port Opening/Closing (N/A)
Primary Opens = 32 degrees ATDC
Secondary Opens = 32 degrees ATDC
Auxiliary Opens = 45 degrees ATDC
Primary Closes = 40 degrees ABDC
Secondary Closes = 30 degrees ABDC
Auxiliary Closes = 80 degrees ABDC
Exhaust Port Opening = 75 degrees BBDC
Exhaust Port Closing = 38 degrees ATDC

Port Opening/Closing (Turbo)
Primary/Secondary Opening = 32 degrees ATDC
Primary/Secondary Closing = 50 degrees ABDC
Exhaust Port Opening = 75 degrees BBDC
Exhaust Port Closing = 48 degrees ATDC

Intake Tracks Length
Primary = 434 mm (17.1 in.)
Secondary = 411 mm (16.2 in.)

Rotor / Seal / Spark Plug Info.
Compression Ratio = 9.4 N/A, 8.5 Turbo
Weight = 4.3 kg (9.4 lb)
Apex = 2 mm (0.08 in.), 3 piece
Side = 0.7 mm (.03 in)
Lead Plug = 18 mm (0.71 in) ahead of trochiod’s minor axis

Radiator
5.4 kg (11.9 lb)

Engine Dimensions
5.15 mm long x 5.35 mm wide x 640 mm high (20.3 x 21 x 25.2 in)
N/A = 153 kg (337 lb) with lubricant/coolant, without radiator and oil cooler
Turbo = 171 kg (377 lb) with turbo and intercooler

Turbo Info.
11 blade turbine = 64 mm (2.52 in)
Scroll’s smallest area = 6.00 sq, cm (0.93 sq. in) primary path, 9.48 sq. cm secondary (1.47 sq. in)
Distance between turbine shaft center and the center of area
- 59.4 mm (2.34 in) primary path, 60.4 mm (2.38 in) secondary
12 blade compressor diameter = 63 mm (2.48 in)
Max boost
- 2000-5000 rpm = 320 mm mercury (0.42 bar/6.2 psi)
- rpm >5000 rpm = 280 mm mercury (0.36 bar/5.4 psi)
Fuel cut = Boost > 400 mm
Max turbine speed = 110,000 rpm

Front Suspension
Wheel Travel = 180 mm (7.1 in); 80 mm up, 100 mm down
Caster Angle = 5 degrees
Shock’s Piston-Rod Size = 22 mm (0.87 in)
Spring Rate kg/mm (lb/in) = 1.9 (106) normal, 2.1 (118) sport
Spring Wire Diameter = 12.1 mm (0.48 in) normal, 11.9 (0.47) sport
Coil Diameter = 147.0 mm (5.79 in) normal/sport
A-arm Bushing Stiffness
- Front Bushing Axial Direction = 35 kg/mm
- Front Bushing Longitudinal Direction = 1250 kg/mm
- Rear Bushing Axial Direction = 50 kg/mm
- Rear Bushing Longitudinal = 450 kg/mm
Bushing
- Length = 50 mm (2.0 in)
- Inner diameter = 40 mm
- Outer diameter = 17 mm
Anti-Roll Bar Diameter = 22 mm normal, 24 mm sport

Rear Suspension
Spring Rate kg/mm (lb/in) = 1.9 (106) normal, 2.1 (118) sport
Spring Wire Diameter = 9.9 (0.39) normal, 10.1 (0.40) sport
Coil Diameter = 84.6 (3.33) normal, 84.4 (3.32) sport
Trailing-Arm Bushing Spring Rate
- Axial Direction = 250 kg/mm
- Longitudinal Direction = 1000 kg/mm
Anti-Roll Bar = 12 mm normal, 14 mm sport

Brakes
14 inch wheels (pressed steel)
- Cast Iron Single Piston Calipers with an 8 in vacuum servo
- Ventilated Front
- Solid Rear Disc
- Disc Diameters = 250 mm (9.8 in) front, 261 mm (10.3 in) rear
- Pad Areas = 86 sq cm (13.3 sq in) front, 64 sq cm (1.9 sq in) rear
- Caliper Weight = 4.3 kg (9.5 lb)
15/16 inch wheels (cast aluminum)
- Front Aluminum Four Piston Calipers / Single-Piston Floating Calipers (9 in vacuum servo)
- Caliper Weight = 3.2 kg (7.1 lb)
- Pad Areas = 94 sq cm (14.6 sq in) front, 64 sq cm (9.9 sq in) rear
- Disc Diameters = 276 mm (10.9 in) front, 273 mm (10.7 in) rear

Interior
- Fore-Aft Seat Adjustment = 200 mm (7.8 in)
- Tachometer Diameter = 112 mm (4.4 in)
- 150 mph Speedometer
- Luggage Space = 184 liters (6.5 cu ft) 2 seater, 104 liters (3.7 cu ft) 2 + 2 seats
- Front Head Room = 9.49 mm (37.2 in)
- Front Leg Room = 1109 mm (43.7 in)
- Front Shoulder Room = 1340 mm (52.8 in)
- Front Hip Room = 1380 mm (54.3 in)
- Rear Head Room = 839 mm (33.0 in)
- Couple Distance = 507 mm (20.0 in)

Heater
Fan Output (Elec.) = 200 watt/12 volt
Heater Output = 415 cu meters/hour (14,656 cu ft/hour)
Side Dash Vent Outputs = 30 cu meters/hour (1059 cu ft/hour)

Sunroof
Opening Size = 250 x 704 mm (9.8 x 27.7 in)

Audio
Grade 1 = No radio/tape deck
Grade 2 = AM/FM radio w/ electronic tuning
- Two 12 cm (4.7 in) dash speakers
- Two 16 cm (6.3 in) rear speakers
Grade 3 = AM/FM radio w/ twin diversity tuning reception antennas
- AM Stereo
- Mechanical Tape Deck
- Two 12 cm (4.7 in) dash speakers
- Two 16 cm (6.3 in) rear speakers
Grade 4 = AM/FM radio
- 9 band graphic equalizer
- Full Electronic Logic-Controller tape deck
- Two 12 cm (4.7 in) dash speakers
- Two 16 cm (6.3 in) rear speakers


References
Yamaguchi, Jack. (1986). Rx-7: the New Mazda Rx-7 and Mazda Rotary Engine Sports Cars. New York: St. Martin's Press.