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ENGINE SPECS

1960 Chevrolet 283 V8 Engine Specs

GENERAL SPECIFICATIONS

Model Designation: Biscayne, Bel Air, Impala and Station Wagons (all engines available)

Wheel base: 119

Valve Location: In head

Bore and Stroke: 3.875 x 3.000

Piston displacement, Cubic Inches: 283

Compression ratio: 8.50

Maximum Brake Horsepower: 170 @ 4200 RPM

Maximum Torque Lbs.Ft. @ RPM: 275 @ 2400 RPM

Normal Oil Pressure Pounds: 35

TUNE UP SPECIFICATIONS (all models)

Spark Plug Make: AC 44

Spark Plug Gap, Inch: .035

Firing Order: 18436572 (front to rear left bank: 1-3-5-7, right bank: 2-4-6-8)

Timing Mark: 4 degrees BTDC; Location: Damper

Engine Idle Speed, RPM:  425

Compression Pressure & Cranking Speed: 150 min.

Voltage & Polarity: 12 volts, negative ground

PISTON AND RING SPECIFICATIONS

Fitting Pistons with Scale: Pistons removed from above. Shim thickness: .0015

Pounds on a Pull Scale: 7-18

Ring End Gap: In tapered bores, fit rings in tightest portion of ring travel
Compression: .010
Oil: .015

Wristpin Diameter, Inch: .9271

VALVE SPECIFICATIONS

Operating Clearance:
     w/mechanical valve lifters: Intake: .012 Hot   Exhaust: .018 Hot
    w/hydraulic valve lifters and one carb: Intake: 0 Exhaust: 0

Valve Seat Angle, degrees: 46

Valve Timing: (BTDC = before top dead center; ATDC = after top dead center)
         Intake opens: 18 BTDC  Exhaust Closes: 20 ATDC

Valve Spring Pressure Pounds at Inches Length:
    Inner Spring: 160 @ 1.30

Valve Lift Zero Lash: Intake: .3336 Exhaust: .3336

Stem Diameter: Intake: .3415-.3422 Exhaust: .3410-.3417

Valve Stem Clearance: Intake: .001-.0027; Exhaust: .0015-.0032

ENGINE BEARING SPECIFICATIONS

Connecting Rod Bearings:
    Journal Diameter, Inches: 1.999-2.000
    Bearing Clearance, Inch: .0007-.0027

Main Bearings:
    Journal Diameter, Inches: 2.2978-2.2988
    Bearing clearance: .0008-.0034
    Shaft End Play: .002-.006    (Thrust on Bearing 5)

Engine Tightening Specs (ft./lbs.)

Spark Plugs: 25

Cylinder Head Bolts: 60-70

Intake Manifold: 25-35

Exhaust Manifold: Center clamp bolts 25-30; end clamp bolts: 15-20

Rocker Arm Shaft Bracket: none

Rocker Arm Covers: 25 (inch/lbs)

Connecting Rod Cap Bolts: 30-35

Main Bearing Cap Bolts: 60-70

Flywheel to Crankshaft: 55-65

Vibration Damper or Pulley: Pressed on

CAPACITY DATA

Cooling System:
    Without heater: 17-1/2 quarts
    With heater: 18-1/2 quarts

Fuel Tank: 20 gallons; 18 gallons in 9 pass. Station Wagons 17 gallons in 6 pass. Station Wagons

Engine Oil: 4 quarts + 1 quart for filter change

Transmission: Standard: 2 pints; w/overdrive: 3 pints; Automatic: 3-1/2 quarts; 4 speed trans: 1-1/2 pints

Rear Axle: 4 pints

DISTRIBUTOR SPECIFICATIONS

Distributor part number: 1110947 (distributor rotates counter-clockwise)

Cam Angle, degrees: 30

Breaker Point opening, Inch: Turn adjusting screw in (clockwise) until engine misfires. Then turn screw 1/2 turn in opposite direction.

Condenser Capacity: .18-.23 Mfds.

Breaker Arm Spring Tension: 19-23 Oz.

Centrifugal Advance: (degrees at RPM of distributor)
    Advance starts: 1 @ 375 RPM
    Full Advance: 14 @ 1875 RPM
    Inches of Vacuum to Start Plunger Movement: 7-9
    Inches of Vacuum for Full Plunger Movement: 15 - 16
    Maximum Vacuum Advance Dist., Degrees: 7-1/2

GENERATOR SPECIFICATIONS

Generator Number: 1102097; 1102174 (w air. cond.); (generator rotates clockwise, 12 volts, Negative Ground)

Generator output:
    1102097: 30 amps @ 2240 RPM;
    1102174: 35 amps @ 2510 RPM;

Brush Spring Tension: 28 oz.

REGULATOR SPECIFICATIONS

Regulator Number: 1119001, 1119002

Cutout Relay:
    Voltage to close points: 12.6
    Armature Air Gap: .020

Voltage Regulator Setting: 14.3 volts

Current and Voltage Armature Air Gap: .075 inches

Current Regulator Setting: 30 amps

STARTING MOTOR SPECIFICATIONS

Part number: 1107660 (rotates clockwise)

Bush Spring Tension, Ounces: 35

No Load Test: 49-76 amps, 10.6 volts @ 6200-9400 RPM

Torque Test: 270-310 Amps, 4.25 volts; 10-1/2 ft.lbs torque

WHEEL ALIGNMENT SPECIFICATIONS

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

Camber, Degrees
    Limits: 0 to +1
    Desired: +1/2

Toe-In, Inches: 5/32 to 7/32

Toe-Out on Turns, Degrees: (If toe-out is incorrect, when other adjustments are correct, look for bent steering arms.)
    Outer wheel: 18-1/2
    Inner Wheel: 20

Steering Axis Degrees: (If spindle support angle is incorrect, but camber is correct, look for bent suspension arms or steering knuckle support)
    3-1/2 to 4-1/2


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