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ENGINE SPECS

1955 Chevrolet 265 V8 Engine Specs

GENERAL SPECIFICATIONS

Model Designation: w/Standard Trans & Powerglide
Wheel base: 115
Valve Location: In head
Bore and Stroke: 3.750 x 3.000
Piston displacement, Cubic Inches: 265
Compression ratio: Standard Trans: 8.0
Maximum Brake Horsepower: w/2 bbl carb.: 162 @ 4400 RPM; w/4 bbl carb: 180 @ 4600
Maximum Torque Lbs.Ft. @ RPM: w/2 bbl carb.: 257 @ 2200; w/4 bbl carb.: 260 @ 2800
Normal Oil Pressure Pounds: 35

TUNE UP SPECIFICATIONS

Spark Plug Make: AC 44-5
Spark Plug Gap, Inch: .035

Firing Order: 18436572

Ignition Timing: Second line before "0" mark on timing tab on front cover. Cars with 4 bbl carb, use sixth line before "0" mark
Engine Idle Speed, RPM: Manual shift trans. 475; automatic trans. 425
Compression Pressure & Cranking Speed: 130 Min.

PISTON AND RING SPECIFICATIONS

Fitting Pistons with Scale:
    Shim thickness to use: .0015
    Pounds Pull on Scale: 7-18
Rings: Compression: .007; Oil: .015
Wristpin Diameter, Inch: .9271

VALVE SPECIFICATIONS

Operating Clearance:
       w/Standard Trans.:  Intake: .008 Hot; Exhaust: .016 Hot
       w/Powerglide: Intake: 0; Exhaust: 0
Valve Seat Angle, degrees: 45
Valve Timing: (BTDC = before top dead center; ATDC = after top dead center)
    w/Standard Trans.:  Intake opens: 12 ATDC; Exhaust closes: 14 ATDC;
    w/Powerglide: Intake opens: 8 BTDC; Exhaust closes: 20 degrees ATDC
Valve Spring Pressure Pounds at Inches Length: 75 @ 1-45/64
Valve Lift, Zero Lash:
    w/Standard Trans.: Intake: .336; Exhaust: .343
    w/Powerglide: Intake: .3732; Exhaust: .3732
Valve Stem Clearance:
    Intake: .001-003
    Exhaust: .0015-.003
Valve Stem Diameter:
    Intake: .3415 - .3422
    Exhaust: .3410 - .3417

ENGINE BEARING SPECIFICATIONS

Connecting Rod Bearings:
    Journal Diameter, Inches: 1.999 - 2.000
    Bearing Clearance, Inch: .001-.003
Main Bearings:
    Journal Diameter, Inches: 2.2978 - 2.2988
    Bearing Clearance, Inch: .001-.003
    Crankshaft End Play, Inch (taken on No. 5 bearing): .002 - .006

CAPACITY DATA

Cooling System:
    Without heater: 16 quarts
    With heater: 17 quarts
    Radiator Cap Relief Presure: 6-1/4 - 7-1/2
    Thermostat Opening Temp.: 180

Fuel Tank: 16 gallons
Engine Oil: 4 quarts (add 1 quart with filter change)
Transmission: 2 pints; Automatic: 5 quarts
Rear Axle: 3-1/2 pints

DISTRIBUTOR SPECIFICATIONS

Distributor part number: 1110847 (distributor rotates clockwise)
Cam Angle, degrees: 26-33
Breaker Point opening, Inch: .016
Condenser Capacity: .18-.23 Mfds.
Breaker Arm Spring Tension: 19-23 Oz.
Centrifugal Advance:
 Advance starts 1 degrees @ 400
 Full Advance: 16 degrees @ 1800 RPM
Vacuum Advance Data:
   Inches of vacuum to start plunger movement: 5 - 7
    Inches of vacuum for full plunger travel: 12 - 14-1/2
    Maximum vacuum advance, Dist. degrees: 11-3/4

GENERATOR SPECIFICATIONS

Generator Number: 1100310, 1102020 (generator rotates clockwise)(negative ground)
Generator output: 1100310: 25 @ 2780 RPM; 1102020: 30 @ 2150
Brush Spring Tension: 28 oz.
Field Current (12 volts): 1100310: 1.5-1.62; 1102020: 1.48 - 1.62

REGULATOR SPECIFICATIONS

Regulator Number: 1118945, 1118825 (Regulators negative ground)
Cutout Relay:
    Voltage to close points: 12.8
    Armature Air Gap: .020
Voltage Regulator Setting: 14.5 volts
Current Regulator Setting: 25 amps
Current and voltage armature air gap, Inch: .075

STARTING MOTOR SPECIFICATIONS

Part number: 1107627 (starter rotates clockwise)
Bush Spring Tension, Ounces: 35 Min.

No Load Test: 75 amps, 10.3 volts @ 6900 RPM

Torque Test: 435 Amps, 5.8 volts, Torque, Lbs.Ft.: 10-1/2

ENGINE TIGHTENING SPECIFICATIONS (FT. LBS.)

Spark Plugs: 20-25
Cylinder Head Bolts: 60-70
Intake Manifold: 25-35
Exhaust Manifold: 25-30
Rocker Arm Shaft Bracket: none
Rocker Arm Cover: 2-1/2
Connecting Rod Cap Bolts: 30-35
Main Bearing Cap Bolts: 60-70
Flywheel to Crankshaft: 55-65
Vibration Damper or Pulley: Pressed on

REAR AXLE AND BRAKE CYLINDER SPECIFICATIONS

Ring Gear & Pinion Backlash, Inch: .005-.008
Drive Pinion Adjustment: Shims
Drive Pinion Bearing Adjustment: none
Axle Shaft End Play, Inch: Controlled by bearing retaining ring
Hydraulic Cylinder Bore Sizes, Inch:
    Wheel Cylinder:
          Front:
1-1/8
        Rear: 1
    Master Cylinder: 1

WHEEL ALIGNMENT SPECIFICATIONS

Caster, Degrees
    Limits: -1/2 to +1/2
    Desired: 0
Camber, Degrees
    Limits: 0 to +1
    Desired: +1/2
Toe-In, Inches: 1/8 to 3/16
Toe-Out on Turns, Degrees: (If toe-out is incorrect, when other adjustments are correct, look for bent steering arms.)
    Outer wheel: 20
    Inner Wheel: 20-1/2 to 24-1/2
Kingpin Angle, or Steering Axis Degrees: (If king pin or spindle support angle are incorrect, but camber is correct, look for bent suspension arms or spindle support)
    3 to 4

·  Understanding Second Chance Garage's Vintage Auto Engine Specs


 
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