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ENGINE SPECS

1951 CHEVROLET - 216 Inline 6 Engine Specs

GENERAL SPECIFICATIONS

Model Designation: Six Cylinder; Special 6, JJ; De Luxe 6 (without Powerglide trans.) JK.
Wheel base: 115
Valve Location: In head
Bore and Stroke: 3-1/2 x 3-3/4
Piston displacement, Cubic Inches: 216.5
Compression ratio: 6.60
Maximum Brake Horsepower: 92 @ 3400 RPM
Maximum Torque Lbs.Ft. @ RPM: 176 @ 1500
Normal Oil Pressure Pounds: 14

TUNE UP SPECIFICATIONS

Spark Plug Make: AC 46-5
Spark Plug Gap, Inch: .035
Firing Order: 153624
Ignition Timing: Timing mark: steel ball located on flywheel
Engine Idle Speed, RPM: Manual shift trans. 475; automatic trans. 425
Cylinder Head Torque Lbs.Ft.: 75-80
Compression Pressure & Cranking Speed: 110

PISTON AND RING SPECIFICATIONS

Fitting Pistons with Scale:
    Removed from Above
Shim thickness to use:
    Pistons should pass on a .002 feeler with light pressure, and lock on a .003 feeler;
Rings: (for tapered bores for minimum clearance fit rings in tightest portion of ring travel)
    Ring Gap, Minimum: Compression: .005
    Ring Gap, Minimum: Oil: .005
    Clearance in Groove: Compression: .0015-.003
    Clearance in Groove: Oil: .002-.0035
Wristpin Diameter, Inch: .8645-.8650

VALVE SPECIFICATIONS

Operating Clearance:
  Standard Trans.:  Intake: .006 Hot;   Exhaust: .015 Hot
  Automatic Trans.: Intake: 0; Exhaust: 0
Clearance for Timing Intake: 0
Valve Seat Angle, degrees: Intake 31; exhaust 46
Valve Timing: (BTDC = before top dead center; ATDC = after top dead center)
   Standard Trans.:  Intake opens: 1 degree ATDC;  Exhaust Closes Degrees ATDC: 9
   Automatic Trans: Intake opens: 16 BTDC, Exhause Closes Degrees ATDC: 17-1/2
Valve Spring Pressure Pounds at Inches Length:
     Spring: Standard: 125 @ 1-1/2; Automatic: 160 @ 1-1.2
Valve Stem Clearance:
    Intake: .001-003
    Exhaust: .002-.004

ENGINE BEARING SPECIFICATIONS

Connecting Rod Bearings:
    Journal Diameter, Inches: 2.311-2.312
    Bearing Clearance, Inch: .0003-.0013
    Rod End Play, Inch: .004-.012
    Rod Bolt Tension, Lbs.Ft.: 35-45
Main Bearings:
    Journal Diameter, Inches: Front: 2.6835 - 2,6845; No. 2: 2.7145-2.7155; No. 3: 2.7455-2.7465; No. 4: 2.7765-2.7775
    Bearing Clearance, Inch: .0007-.0028
    Crankshaft End Play, Inch (taken on No. 3 bearing): .003-.009
    Main Bolt Tension, Lbs.Ft.: 100-110

CAPACITY DATA

Cooling System:
    Without heater: 15 quarts
    With heater: 16 quarts
Fuel Tank: 16 gallons
Engine Oil: 5 quarts
Transmission: 1-1/2 pints;
Rear Axle: 3-1/2 pints

DELCO-REMY DISTRIBUTOR SPECIFICATIONS

Distributor part number: 1112362, 1112363 (distributor rotates clockwise)
Cam Angle, degrees: 31-37
Breaker Point opening, Inch: .022
Condenser Capacity: .18-.23 Mfds.
Breaker Arm Spring Tension: 17-21 Oz.
Centrifugal Advance:
1112362:
    Advance starts 1-1/2 degrees @ 350
    Full Advance: 19 degrees @ 1700 RPM
1112363;
    Advance starts 1 @ 300
    Full Advance: 16-1/2 @ 1850
Vacuum Advance Data:
   Inches of vacuum to start plunger movement: 7-8-1/2
    Inches of vacuum for full plunger travel: 16-1/2 - 18-1/2
    Maximum vacuum advance, Dist. degrees: 10

DELCO-REMY GENERATOR SPECIFICATIONS

Generator Number: 1102749, 1102761 (generator rotates clockwise)
Generator output:
    1102749: 45 Amps @ 2400 RPM; 1102761 36 Amps @ 2400
Brush Spring Tension: 28 oz.
Field Current (6 volts): 1.75-1.9

REGULATOR SPECIFICATIONS

Regulator Number: 1118300, 1118301 (Regulators negative ground)
Cutout Relay:
    Voltage to close points: 6.4
    Reverse Current to Open Points: 0-3 amps
    Armature Air Gap: .020
Voltage Regulator Setting: 7.3 volts
Current Regulator Setting: 1118300: 42 amps; 1118301 36 amps
Current and voltage armature air gap, Inch: .075

DELCO-REMY STARTING MOTOR SPECIFICATIONS

Part number: 1107075 (starter rotates clockwise)
Bush Spring Tension, Ounces: 24-28
No Load Test: 70 amps, 5.65 volts @ 5500 RPM
Torque Test: 550 Amps, 3.25 volts, Torque, Lbs.Ft.: 11

·  Understanding Second Chance Garage's Vintage Auto Engine Specs



 

 

 

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