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.

[Roen]

Additional Info

Steering
Power (RPM-Sensitive)
Steering Ratio - 17.4:1

Transmission
M Type (N/A, 87-92)
- 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 = 0.697:1
- Reverse = 3.493:1
- Final Drive = 4.100:1
- 1st ---> 2nd Synchronizer Diameter = 65 mm (2.45 in)M Type (N/A, 89-90 GTUs Only)
- 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 = 0.756:1
- Reverse = 3.493:1
- Final Drive = 4.300:1
- 1st ---> 2nd Synchronizer Diameter = 65 mm (2.45 in)
R Type (Turbo, 89-91)
- 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 = 0.719
- Reverse = 3.288:1
- Final Drive = 4.100:1
- 1st ---> 2nd Synchronizer Diameter = 76 mm (2.99 in)
- 2nd ---> 3rd Synchronizer Cone Diameter = 65 mm (2.45 in)
R Type (Turbo, 91 Infini IV Only)
- 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 = 0.719
- Reverse = 3.288:1
- Final Drive = 4.300:1
- 1st ---> 2nd Synchronizer Diameter = 76 mm (2.99 in)
- 2nd ---> 3rd Synchronizer Cone Diameter = 65 mm (2.45 in)

Rotor / Seal / Spark Plug Info. (89-91)
Compression Ratio = 9.7 N/A, 9.0 Turbo

Brakes (89-92)
15 inch wheels (Standard Brakes)
- Cast Iron Single Piston Calipers with an 8 in vacuum servo
- Ventilated Front
- Solid Rear Disc
- Disc Diameters = 276 mm (10.9 in) front, 261 mm (10.3 in) rear
- Pad Areas = 64 sq cm (1.9 sq in) rear
- 15/16 inch wheels
- 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

[My5ABaby]

You little theif . Yeah, I was getting to those later, but oh well.

I have a bunch more info that I'm going to post up.

[My5ABaby]

Stock Turbo Information (S4)

The stock turbo on an S4 features an 11-blade turbine measuring 64mm (2.52 in). The scroll's smallest area is 6.00 sq. cm (0.93 sq. in) primary path, and a 9.48 sq. cm (1.47 sq. in) secondary path. The distance between turbine shaft center and the center of area was 59.4 mm (2.34 in) for the primary path and 60.4 mm (2.38 in) for the secondary path. The compressor is a 12-blade design, with a 63 mm (2.48 in) diameter. The maximum turbine speed is 110,000 rpm.

The S4 FC featured a unique twin-scroll design that virtually eliminated turbo lag. At low speed, exhaust gas enters the turbo via the primary path. When the engine reaches 2500 rpm, the secondary path is opened.

Maximum Boost Levels

* 2000-5000 rpm: 320 mm mercury (0.42 bar/6.2 psi)
* 5000+ rpm: 280 mm mercury (0.36 bar/5.4 psi)
* Fuel Cut: 400+ mm boost

Edit: I guess I should of read Roen's post more carefully because this is on there too. Oh well...

[My5ABaby]

Stock Brake Information


14 Inch Wheels (Pressed Steel)

Front

* Caliper Type: Single piston cast iron, 8" vacuum servo
* Caliper Weight: 4.3 kg (9.5 lb)
* Disc Type: Ventilated
* Disc Diameter: 250 mm (9.8 in)
* Pad Area: 86 sq cm (13.3 sq in)

Rear

* Caliper Type: Single piston cast iron, 8" vacuum servo
* Caliper Weight: 4.3 kg (9.5 lb)
* Disc Type: Solid
* Disc Diameter: 261 mm (10.3 in)
* Pad Area: 64 sq cm (1.9 sq in)




15 and 16 Inch Wheels (Cast Aluminum)

Front

* Caliper Type: Four piston aluminum floating, 9" vacuum servo
* Caliper Weight: 3.2 kg (7.1 lb)
* Disc Type: Ventilated
* Disc Diameter: 276 mm (10.9 in)
* Pad Area: 94 sq cm (14.6 sq in)

Rear

* Caliper Type: Single piston aluminum floating, 9" vacuum servo
* Caliper Weight: 3.2 kg (7.1 lb)
* Disc Type: Ventilated
* Disc Diameter: 273 mm (10.7 in)
* Pad Area: 64 sq cm (9.9 sq in)

Edit: I see the brake info is above... but I'm leaving this one up because it's prettier.

[Phoenix7]

P747 Prototype tails:


Wind Tunnel: