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ENGINE SPECS

1946 Ford 239 Flathead V8 Engine Specs

GENERAL SPECIFICATIONS

Model Designation: V8 - 69A (first serial number: 99A-650280)

Wheel base: 114

Valve Location: In block

Bore and Stroke: 3-3/16" x 3-3/4"

Piston displacement, Cubic Inches: 239.4

Compression ratio: 6.75

Maximum Brake Horsepower: 100 @ 3800 RPM

Maximum Torque Lbs.Ft. @ RPM: 180 @ 2000

Normal Oil Pressure Pounds: 30

TUNE UP SPECIFICATIONS

Spark Plug Make: Champion H10

Spark Plug Gap, Inch: .030

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

Ignition Timing: No timing mark. (Spark is advanced or retarded by adjusting vacuum brake set screw on distributor housing)

Engine Idle Speed, RPM: Manual shift trans. 475; automatic shift trans. N/A

Cylinder Head Torque Lbs.Ft.: 50-60

Compression Pressure & Cranking Speed: 110 Min.

PISTON AND RING SPECIFICATIONS

Fitting Pistons with Scale:
    Removed from Above
Shim thickness to use:
    With sleeves and aluminum pistons .0025";
    without sleeves .002"
    Pounds Pull on Scale: 6 to 12

Rings: (for tapered bores for minimum clearance fit rings in tightest portion of ring travel)
    Ring Gap, Minimum: Compression: .014
    Ring Gap, Minimum: Oil: .014
    Clearance in Groove: Compression: .0015-.003
    Clearance in Groove: Oil: .0015-.003

Wristpin Diameter, Inch: .7501-.7504

VALVE SPECIFICATIONS

Operating Clearance:
    Intake: .012 Cold
    Exhaust: .014 Cold

Clearance for Timing Intake: .012

Valve Seat Angle, degrees: 45

Valve Timing: (BTDC = before top dead center; ATDC = after top dead center)
    Intake opens: TDC
    Exhaust Closes Degrees ATDC: 6

Valve Spring Pressure Pounds at Inches Length:
     Spring: 37 @ 2-1/8 (only one spring used)

Valve Stem Clearance:
    Intake: .0025-.0045
    Exhaust: .0025-.0045

ENGINE BEARING SPECIFICATIONS

Connecting Rod Bearings:
    Journal Diameter, Inches: 2.1390
    Bearing Clearance, Inch: .0017-.0036
    Rod End Play, Inch: .004-.008
    Rod Bolt Tension, Lbs.Ft.: 40

Main Bearings:
    Journal Diameter, Inches: 2.4990
    Bearing Clearance, Inch: .000-.003
    Crankshaft End Play, Inch (taken on rear bearing): .002-.006
    Main Bolt Tension, Lbs.Ft.: 80

CAPACITY DATA

Cooling System:
    Without heater: 22 quarts
    With heater: 23 quarts

Fuel Tank: 17 gallons

Engine Oil: 5 quarts

Transmission: 2-3/4 pints

Rear Axle: 2-1/2 pints

STARTING MOTOR SPECIFICATIONS

Unit Number: 7RA-1101

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

VACUUM BRAKE DISTRIBUTOR SPECIFICATIONS

Distributor part number: 59A-12127

Cam Angle, degrees: 36, total dwell both breakers

Breaker Gap, Inch: .014-.016

Condenser Capacity: .21-.25 Mfds.

Breaker Arm Spring Tension: 20-24 Oz.

Centrifugal Advance:
    Advance starts 2 degrees before top center
    Full Advance: 12 degrees @ 1725 RPM

GENERATOR SPECIFICATIONS

Generator Number: 21A-10000 (generator rotates clockwise)

Generator output: 30 Amps @ 1700 RPM

Brush Spring Tension: 30 oz.

REGULATOR SPECIFICATIONS

Regulator Number: 8A-10505

Cutout Relay:
    Voltage to close points: 6.3
    Reverse Current to Open Points: 0-8 amps
    Armature Air Gap: .017

Voltage Regulator Setting: 7.3 volts

Current Regulator Setting: 30 amps

Current and voltage armature air gap, Inch: .035