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Specifications Ford Flathead V8 60 HP


Number of cylinders: 8
Type of block: 90° V
Crankshaft degrees: 90
Bore: 2.6"
Stroke: 3.2"
Displacement cubic inches: 136
Taxable HP rating: 21.6
Firing order: 1-5-4-8-6-3-7-2
Head "L" type


Lubrication

Pressure lubrication to all main bearings, connecting rod bears, and camshaft bearings.
Normal oil pressure at 2000 RPM: 30lbs.
Oil pump one gallon per minute at 2000 RPM
Oil capacity: 4 quarts
Type oil gauge: bayonet
Type oil pump: gear
Drain plug diameter: 1.5"

Cylinder Block
Ford cast alloy iron
Water jackets full length of cylinder
Offset cylinders: 0.141"
Piston Pins
Float in rod an piston retainer at ends of pin.
Diameter: .6876" to .6879"
Length: 2.368"
Clearance in steel piston: .0004"
Fit in rod .0001" loose

Piston Rings
Top ring (compression) plain
Width: .0920" to .0925"
Thickness: .115" to .120"
Gap: .012" to .017"
No. 2 compression ring, 1937-1938 plain. 1939-1940 expander type.
Width: .0920" to .0925"
Thickness: .098" to .102"
Gap: .012" to .017"

Cylinder Heads

Material Comp Ratio Max BHP Max Torque Compression Pressure No. Studs Volume
Aluminum 6.6 60@3500RPM 94@2500RPM 158lbs. @2800 RPM Max
116 lbs @ cranking speed
17 41-43 c.c
Cast Iron 6.6 60@3500RPM 94@2500RPM 158 lbs. @2800 RPM Max
116 lbs @ cranking speed
17 41-43 c.c.

Pistons

Material Dome Skirt Weight (Grams) Fit of Piston in Cylinder (Using 0.50" Wide Feeler) Ring Groove Width
Thickness of Blade Top Center Bottom
Hardened Sleeve Bore Plain Bore Pounds Pull .095" .0945" .1575"
Steel Spherical Solid 226-231 .0025" .002" 7-12

 

Oil Control Ring
1937 to 1938 plain oil control.
1939 to 1941 expander oil control.
Width 1937-1938......... .1545"-.1550"
Width 1939-1940......... .1535"-.1540"
Thickness 1937-1938....... .110"-.120"
Thickness 1939-1940....... .094"-.098"
Gap.................................. .012"-.017"

Connecting Rods
Length center to center.... 6.125"
Crankpin end bore
1937-1939...................... 1.800"
1940................................ 1.900"
Width crankpin end............ .700"
Bushing bore.................... .6879"
Bushing length................... 1.115"
Weight 1937-1939...... 271 grams
Weight 1940............... 295 grams

Crankpin Bearing Inserts
Floating type. Flanged 1937-1939. No flange 1940. Two rods on each insert.
Length overall 1937-1939.... 1.535"
Length overall 1940............. 1.403"

Crankshaft
Counter balanced 90 degree type.
Cast alloy steel.
Length overall 1937-1939...... 20.82"
Length overall 1940................ 22.88"
Crank Pin Journal Diameter
1937-1939............................. 1.599"
1940...................................... 1.699"
Length 1937-1939.................. 1.54"
Length 1940............................ 1.408"
Main Bearing Journal Diameter
1937-1939.............................. 1.999"
1940........................................ 2.099"
Length front............................. 1.622"
Length center........................... 1.648"
Length rear.............................. 2.002"
Weight 1937-1939.................. 44.9 lbs.
Weight 1940........................... 40.5 lbs.
Endplay.................................. .002"-.005"
Main bearing inserts length
Front and center...................... 1.510"
Rear........................................ 1.999"
Wall thickness......................... .0855"
Piloted cap no shims.

Flywheel and Starter Gear
Cast iron flywheel, steel gear material.
Weight 1937-1939................ 31.3 lbs.
Weight 1940......................... 23.8 lbs.

Engine Specifics
Overall weight less accessories...... ???
Overall weight w/ accessories........ ???
Dimensions:
Length.......................................... ???
Width........................................... ???
Height........................................... ???

Valves
Mushroom stem. Lifter non adjustable, hollow cast. Valve, guide, and spring removable as an assembly. Valve seat inserts (molybdenum chrome ally steel) for exhaust. Valve material high chrome silicon alloy steel.
Diameter of head.................... 1.281"
Diameter of stem.................. 0.2795"
Diameter of stem end.............. 0.460"
Diameter of seat angle................. 45°
Diameter of lifter................... 0.8295"
Lift of cam.............................. 0.251"
Spring length valve closed......... 2.05"
Pressure valve closed.......... 26-30 lbs.
Pressure valve open............ 48-52 lbs.
Stem clearance............. .0015"-.0035"
Valve clearance................ .011"-.012"
Valve Timing
Intake opens BTC.......................... 9.5°
Intake closes ABC....................... 54.5°
Exhaust opens.............................. 57.5°
Exhaust closes................................ 6.5°

 

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