Graham restoration
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Graham Specifications
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Supercharger
Make & Type
Drive
Ratio, rotor to engine
Ratio of gearing
Rotor materia
Rotor diameter
Type bearing
Number of bearings
Bearing Types:
Worm Shaft
Rotor Shaft
Rotor Shaft
Rotor cover
Graham-centrifugal
Twin V-belt
5.75 to one
4.8 to one
Aluminum
7 ½ inches
Special cone worm
Five
Bronze-babbitt
Bronze-babbitt
Rotor Shaft Pilot Lead-bronze
Water jacketed
Engine
Make
Type & number of cylinders & Stroke
Cubic inch displacement
Brake horsepower @ RPM
Horsepower rating (AMA)
Maximum Torque
Compression at cranking speed
Firing Order
Engine Mounts
Graham
L-head, 6cylinders
3 ¼ X 4 3/8
217.8
93 @ 3800 non-supercharged
120 @ 4000 supercharged
25.35
170 Ft-Lb
125 lbs non-supercharged
130 lbs supercharged
1-5-3-6-2-4
3 point rubber
Engine Speeds (Rev./ mile) Standard axle (4.27)
Overdrive
High gear
Second gear
Low gear
Reverse gear
2255 non-supercharged
2224 supercharged
3181
4930 non-supercharged
4863 supercharged
8175 non-supercharged
8064 supercharged
11069 non-supercharged
10920 supercharged
Cylinder Head
Material Iron
Type High Compression
Compression ratio standard 6.65 to one
No. of optional heads 2
Ratio of optional head 7.00 to one
Ratio of special optional head 7.25 to one
Valves
Intake valve material Chrome nickel steel
Intake valve seat angle 30 degrees
Intake valve head diameter 1 33/64”
Exhaust valve material X.B. steel non-supercharged
X.C.R. steel supercharged
Exhaust valve angle 45 degrees
Exhaust valve head diameter 1 21/64”
Crankcase
Type Integral with cylinders
Material Copper-Chrome Iron
Water jacket type Full length of cylinders
Cylinder bore finish Honed
Crankcase oil capacity 5 Quarts
Crankcase ventilation Cross flow
Crankcase air cleaner Wire mesh
Crankshaft
Material Forged steel
Features Integral counter-weights
Number main bearings Four
Main bearing diameter 2 3/8”
Bearing Journal Lengths:
Front 1 9/32”
Front center 1 ½”
Rear center 1 ½”
Rear 1 47/64”
Bearing type Interchangeable
Bearing material Steel shell, Cadmium silver
Connecting Rods
Material Forged steel
Length 7”
Bearing type Interchangeable
Bearing material Steel shell, Cadmium silver
Bearing diameter and length 2 7/16” X 1 3/16”
Carburetor
Make & Model Carter WA-1
Type Down draft
Outlet Single
Size 1 3/8”
Adjustments Idle only
Fuel System
Gas tank capacity 17 Gallons, US
Fuel feed Mechanical pump
Pump type Diaphragm
Fuel filter Integral with pump
Air cleaner type Oiled copper mesh
Fuel temperature regulation Thermostat non-supercharged
Automatic supercharged
Fuel heating medium Exhaust heat non-supercharged
Water supercharged
Choke control Automatic
Lubrication
Engine lubrication Pressure
Normal Oil pressure 45 Lbs.
Pressure oiling to Entire engine, internal
Crankcase capacity 5 quarts, pus one with filter
Oil pump type Submerged gear
Oil pump drive Geared to camshaft
Chassis lubrication Pressure gun
Number & type fittings 14, Ball end
Pistons & Rings
Piston make & material Bohn-aluminum
Piston type Auto-thermic, steel struts
Piston finish Bearing metal plated
Compression ring width 3/32 two used
Oil control ring width 5/32 two used
Piston pin diameter 13/16
Camshaft
Drive Link belt
Chain width & length 1 X 23
Chain pitch ½
Bearings, number & material 4, Bronze
Cooling System
Type circulating Pump
Pump type Centrifugal-packless
Bearing type Double row ball bearing
Bearing lubrication Not required
Pump circulating capacity 45 Gal. Per minute
Radiator type Cellular
Cooling system capacity 14 Quarts
Water temperature control Thermostat
Fan diameter & blade number 16, four