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ENGINE SPECS

1951 Studebaker 169 Six Engine Specs

GENERAL SPECIFICATIONS

Model Designation: Champion 6: 9G

Wheel base: 113

Valve Location: In block

Bore and Stroke: 3 x 4

Piston displacement, Cubic Inches: 169.6

Compression ratio: 7.00

Maximum Brake Horsepower: 85 @ 4000 RPM

Maximum Torque Lbs.Ft. @ RPM: 138 @ 2400 RPM

Normal Oil Pressure Pounds: 40

TUNE UP SPECIFICATIONS

Spark Plug Make: Champion J7

Spark Plug Gap, Inch: .025

Firing Order: 153624

Ignition Timing: IGN on Vib. Damp.

Engine Idle Speed, RPM:  500

Cylinder Head Torque Lbs.Ft.: 52

Compression Pressure & Cranking Speed: 115 Min.

Voltage & Polarity: 6 volts, positive ground

PISTON AND RING SPECIFICATIONS

Fitting Pistons with Scale:
Shim Thickness to use: .002 (1 inch wide feeler);

Pounds Pull on Scale:: 11 to 16

Ring End Gap: (Fit rings in tapered bores for clearance shown in tightest portion of ring travel.)
Compression: .007
Oil: .007

Clearance in Groove: Compression: .002-.0025; Oil: .0015-.002

Wristpin Diameter, Inch: .7491-.7495

VALVE SPECIFICATIONS

Operating Clearance:
     Intake: .016 Cold  Exhaust: .016 Cold

Valve Seat Angle, degrees: 45

Valve Timing: (BTDC = before top dead center; ATDC = after top dead center)
         Intake opens: 15 degrees BTDC
         Exhaust Closes: 10 ATDC

Valve Spring Pressure Pounds at Inches Length:
    Inner Spring: 54 @ 1-21/32

Valve Stem Clearance: Intake: .0015-.0035; Exhaust: .0015-.0035

Clearance for Timing Intake: .020

ENGINE BEARING SPECIFICATIONS

Connecting Rod Bearings:
    Journal Diameter, Inches: 1.81175-1.81275
    Bearing Clearance, Inch: .0005-.00215
    Rod End Play, Inch: .005-.009
    Rod Bolt Tension: Lbs.Ft.: 28-32

Main Bearings:
    Journal Diameter, Inches: 2.4370-2.4375
     Bearing clearance: .0005-.0025
    Shaft End Play: .003-.006    (Thrust on front bearing)
    Main Bolt Tension: Lbs.Ft.: 88-93

CAPACITY DATA

Cooling System:
    Without heater: 10 quarts
    With heater: 11-1/2 quarts

Fuel Tank: 18 gallons

Engine Oil: 5 quarts

Transmission: w/out overdrive: 1-1/2 pint; with overdrive: 2-3/4; w/auto. trans: 9-1/2 quarts

Rear Axle: 2-1/2 pints

AUTO-LITE DISTRIBUTOR SPECIFICATIONS

Distributor part number: 1AT-4001 (distributor rotates counter-clockwise when viewed from top)

Cam Angle, degrees: 39

Breaker Point opening, Inch: .020 (plus or minus .002)

Condenser Capacity: .20-.25 Mfds.

Breaker Arm Spring Tension: 17-20 Oz.

Centrifugal Advance: (degrees at RPM of distributor)
    Advance starts: 1 degrees @ 550
    Full Advance: 7 @ 1400

Vacuum Advance Data (degrees @ In. of Mercury):
        Advance starts: 1 @ 5
        Full Advance: 9 @ 12

AUTO_LITE GENERATOR SPECIFICATIONS

Generator Number: GDZ-6001A (generator rotates clockwise, 6 volts, positive ground)

Generator output: 35 amps @ 2000 RPM

Brush Spring Tension: 35-53 oz.

Field Current: 1.3 - 1.5 at 5 volts

AUTO-LITE REGULATOR SPECIFICATIONS

Regulator Number: VRP-6005A

Cutout Relay:
    Voltage to close points: 6.5
    Reverse Current to Open Points: 4-6 amps
    Armature Air Gap: .031

Voltage Regulator Setting: 7.3 volts

Current Regulator Setting: 35 amps

Current and voltage armature air gap, Inch: .048

AUTO-LITE STARTING MOTOR SPECIFICATIONS

Part number: MZ-4157 (starter rotates clockwise)

Bush Spring Tension, Ounces: 42-53

No Load Test: 68 amps, 5.0 volts @ 4000 RPM

Torque Test: 280 Amps, 2.0 volts, Torque, Lbs.Ft.: 4.4

WHEEL ALIGNMENT SPECIFICATIONS

Caster, Degrees
    Limits: -1 to +2-1/2
    Desired: -1-3/4

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

Toe-In, Inches: 1/16 to 1/8

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: 22-1/2 to 23-1/2

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 steering knuckle support)
    5-1/4


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