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ENGINE SPECS

1955 Ford 272 V8 Engine Specs

GENERAL SPECIFICATIONS

Model Designation: V8 - U5

Wheel base: 115-1/2

Valve Location: In head

Bore and Stroke: 3.6260" x 3.600"

Piston displacement, Cubic Inches: 272

Compression ratio: 7.60

Maximum Brake Horsepower: 162 @ 4200 RPM

Maximum Torque Lbs.Ft. @ RPM: 258 @ 2200

Normal Oil Pressure Pounds: 50

TUNE UP SPECIFICATIONS

Spark Plug Make: Champion F-14-Y

Spark Plug Gap, Inch: .034

Firing Order: 15486372 (from front to rear: Right 1-2-3-4; left 5-6-7-80

Ignition Timing: Marks on Vib. Damp. Wide mark is TDC, each succeeding mark represents 2, 4, 6, 8 and 10 degrees before TDC. Set timing 3 degrees BTDC on cars with manual shift transmission and 6 degrees BTDC on Fordomatic equipped cars.

Engine Idle Speed, RPM: Manual shift trans. 475; automatic shift trans. 450

Cylinder Head Torque Lbs.Ft.: 75

Compression Pressure & Cranking Speed: 130 Min.

PISTON AND RING SPECIFICATIONS

Fitting Pistons with Scale:
    Removed from Above
    Shim thickness to use: .002
    Pounds Pull on Scale: 5 to 10

Rings: (for tapered bores for minimum clearance fit rings in tightest portion of ring travel)
    Ring Gap, Minimum: Compression: .010
    Ring Gap, Minimum: Oil: .010
    Clearance in Groove: Compression: .002-.0035
    Clearance in Groove: Oil: .0015-.003

Wristpin Diameter, Inch: .9120-.9123

VALVE SPECIFICATIONS

Operating Clearance:
    Intake: .019 Hot or Cold
    Exhaust: .019 Hot or Cold

Clearance for Timing Intake: .019

Valve Seat Angle, degrees: 45

Valve Timing: (BTDC = before top dead center; ATDC = after top dead center)
    Intake opens: 12 degrees BTDC
    Exhaust Closes: 8 degrees ATDC

Valve Spring Pressure Pounds at Inches Length:
     Spring: 54 @ 1.82

Valve Stem Clearance:
    Intake: .001-.0024
    Exhaust: .0023-.0037

Valve Stem Clearance: Intake: .3415-.3425; Exhaust: .3405-.3415

ENGINE BEARING SPECIFICATIONS

Connecting Rod Bearings:
       Journal Diameter, Inches: 2.1880-2.1888
        Bearing Clearance, Inch: .037 Max.
        Rod End Play, Inch: .012 Max.
        Rod Bolt Tension, Lbs.Ft.: 45-50     

Main Bearings:
        Journal Diameter, Inches: 2.4980-2.4988
        Bearing Clearance, Inch: .0042 Max.
        Crankshaft End Play, Inch (taken on No. 3 bearing): .010 Max.
        Main Bolt Tension, Lbs.Ft.: 95-105

CAPACITY DATA

Cooling System:
    Without heater: 20 quarts
    With heater: 21 quarts

Fuel Tank: 17 gallons (station wagons and couriers 19 gallons)

Engine Oil: 5 quarts

Transmission:
    without overdrive: 3 pints
    with overdrive: 4
    Automatic Transmission: 9-3/4 quarts

Rear Axle: 3-1/2 pints; Station wagon: 3

STARTING MOTOR SPECIFICATIONS

Unit Number: FAC-11001A&B

Brush Spring Tension: 48-56 ounces

No Load Test: 70 Amps, 6 Volts @ 3000 RPM

Torque Test: 700 Amps, 3.5 Volts, 16 Lbs.Ft. Torque

LOADAMATIC DISTRIBUTOR SPECIFICATIONS

Cam Angle, degrees: 28

Breaker Gap, Inch: .014-.016

Condenser Capacity: .21-.25 Mfds.

Breaker Arm Spring Tension: 17-20 Oz.

Distributor Vacuum Advance Data:
Centrifugal Advance:
        Degrees advance at 300 RPM: 0, Inches vacuum: .15
        Degrees advance at 500 RPM: 1-1/2 - 2-1/2, Inches vacuum: .40
        Degrees advance at 1000 RPM: 9-1/2 - 10-1/2, Inches vacuum: 1.58
        Degrees advance at 1500 RPM: 12-3/4 - 14, Inches vacuum: 3.13
        Degrees advance at 2000 RPM: 15-1/4 - 16-1/2, Inches vacuum: 4.6

GENERATOR SPECIFICATIONS

Generator Number: FAT-10000A (generator rotates clockwise)

Generator output:
   35 Amps @ 850 (engine speed)

Brush Spring Tension: 30 oz.

REGULATOR SPECIFICATIONS

Regulator Number: FAD-10505A

Cutout Relay:
    Voltage to close points: 6.3
    Reverse Current to Open Points: 0-8 amps
    Voltage regulator setting: 7.4 volts
    Current regulator settins: 40 amps

ENGINE TIGHTENING SPECIFICATIONS (FT. LBS.)

Spark Plugs: 15-20

Cylinder Head Bolts: 65-75

Intake Manifold: 23-28

Exhaust Manifold: 23-28

Rocker Arm Shaft Bracket: 12-15

Rocker Arm Cover: 2 - 2-1/2

Connecting Rod Cap Bolts: 45-50

Main Bearing Cap Bolts: 95-105

Flywheel to Crankshaft: 75-85

Vibration Damper or Pulley: 85-95

REAR AXLE AND BRAKE CYLINDER SPECIFICATIONS

Ring Gear & Pinion Backlash, Inch:
     Passenger Car:
.003-.008
    Station Wagon: .003-.008

Drive Pinion Adjustment:
     Passenger Car:
Shims
    Station Wagon: Shims

Drive Pinion Bearing Adjustment:
     Passenger Car:
Spacer
    Station Wagon: Spacer

Axle Shaft End Play, Inch:
     Passenger Car:
None
    Station Wagon: None

Hydraulic Cylinder Bore Sizes, Inch:
    Wheel Cylinder:
          Front:
1-1/8
        Rear: 7/8 (incl Thunderbird) (station wagon: 15/16)
    Master Cylinder: 1

WHEEL ALIGNMENT SPECIFICATIONS

Caster, Degrees
    Limits: +1/2 to + 1-1/2
    Desired: +1

Camber, Degrees
    Limits: +1/4 to +1-1/4
    Desired: +3/4

Toe-In, Inches: 1/16 to 1/8

Toe-Out on Turns, Degrees: (If toe-out is incorrect, when other adjustments are correct, look for bent steering arms.)
    Outer wheel: 20
    Inner Wheel: 24-1/2

Kingpin Angle, or Steering Axis Degrees: (If king pin or spindle support angle are incorrect, but camber is correct, look for bent suspension arms or spindle support)
    7° 7'


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