About This Site

Feature Articles
Auto Theory
Auto-Biography
Beginners Corner
Buyer's Guide
Classic Car
    Classifieds

Discussion Forum
Dr. Crankshaft
Engine Specs
How To
Product Reviews
Readers' Projects
Restoration Tips
Rod and Custom
The Good Ol' Days
Troubleshooting
Photo Gallery
Useful Websites

'52 Ford F1 Pickup
'55 T-Bird

Article Index
Contact Us
Privacy Policy
Site Map
Terms of Use
Advertise with Us

ENGINE SPECS

1947 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 5-6-7-8

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

·  Understanding Second Chance Garage's Vintage Auto Engine Specs





 

 

 

Home    Search    Discussion Forum
©2010 Second Chance Garage, LLC, All Rights Reserved. Reproduction without permission prohibited.