1974 CHEVROLET VEGA

1974 CHEVROLET VEGA

Model Designations:

Chevrolet Vega, Series 1V, 4 Cylinder

Chevrolet Vega, Body Styles:

2 Door Notchback Sedan, 4 Passenger, Body #11

Base Price: $2,087; Shipping Weight: 2,219 Pounds

Production Total: 63,591

2 Door Hatchback Coupe, 4 Passenger, Body #77

Base Price: $2,192; Shipping Weight: 2,313 Pounds

Production Total: 271,682

2 Door Station Wagon, 4 Passenger; Body #15

Base Price: $2,323; Shipping Weight: 2,327 Pounds

Production Total; 113,326

2 Door 1/2 Ton Panel Express Wagon, 2 Passenger, Body #05

Base Price: $2,404; Shipping Weight: 2,402 Pounds

Production Total: 4,289

General Specifications:

Wheelbase:

All Styles: 97"

Overall Length:

All Styles: 176"

Tire Sizes:

All Styles: AT78 X 13"

Engine Specifications, 140 Cu. In., 4 Cylinder, 75 HP:

Engine Type: In-Line 4 Cylinder, Overhead Cam

Bore & Stroke: 3.500" X 3.625"

Engine Displacement: 140 Cu. In.

Compresssion Ratio: 8.00 to 1

Taxable Horsepower: 19.6

Horsepower: 75 @ 4,400 RPM

Torque: 115 Ft. Lbs. @ 2,400 RPM

Normal Oil Pressure: 40 PSI

Carburetor: 1 Barrel

Engine Specifications, 140 Cu. In., 4 Cylinder, 85 HP:

Engine Type: In-Line 4 Cylinder, Overhead Cam

Bore & Stroke: 3.500" X 3.625"

Engine Displacement: 140 Cu. In.

Compresssion Ratio: 8.00 to 1

Taxable Horsepower: 19.6

Horsepower: 85 @ 4,400 RPM

Torque: 122 Ft. Lbs. @ 2,400 RPM

Normal Oil Pressure: 40 PSI

Carburetor: 2 Barrel

Capacities:

4 Cylinder, 140 Cu. In. Engine:

Cooling System:

With Heater: 7.6 Quarts

With Air Conditioning: 8.0 Quarts

Radiator Cap Pressure:

With Air Conditioning: 15 PSI

Without Air Conditioning: 15 PSI

Thrermostat Opening: 195 Degrees

Fuel Tank: 16 Gallons

Engine Oil Refill: 4 Quarts, with Filter

Transmission Oil:

3 Speed: 3 Pints

4 Speed: 3 Pints

Automatic Transmission: 4 Quarts

Rear Axle: 2.8 Pints

Tune Up Specifications, 4 Cylinder, All Engines:

Spark Plug Type: AC R42TS

Spark Plug: Gap .035"

Point Gap:

New Points: .019"

Used Points: .016"

Dwell Angle: 31-34 Degrees

Firing Order: 1-3-4-2

Ignition Timing:

Standard Transmission: 10 Degrees BTDC on Pulley

Automatic Transmission: 12 Degrees BTDC on Pulley

Engine Idle Speed:

Standard Transmission: 700 RPM

Automatic Transmission: 750 RPM, in Drive

Valve Specifications, 4 Cylinder, Both Engines:

Valve Lash (Cold):

Intake: .015"

Exhaust: .030"

Valve Angles:

Seat: 46 Degrees

Face: 45 Degrees

Valve Spring Height: 1.746"

Valve Spring Pressure: 190 Lbs @ 1.31 inches

Valve Stem Clearance: Intake .001"-.0027"

Exhaust .001"-.0027"

Valve Stem Diameter:

Intake: .3410"-.3417"

Exhaust: .3410"-.3417"

Pistons, Pins, Rings, Crankshaft & Bearings Data, 4 Cylinder:

Piston Clearance: .0018"-.0028"

Piston Rings:

Ring End Gap:

Compression:

Top Ring: .015"

Lower Ring: .009"

Oil: .010"

Wrist Pin Diameter: .9272"

Rod Bearings:

Shaft Diameter: 1.999"-2.000"

Rod Bearing Clearance: .0007"-.0038"

Main Bearings:

Shaft Diameter: 2.2983"-2.2993"

Main Bearing Clearance:

#1: .0003"-.002"

Others: .0003"-.003"

Thrusk on Bearing #4

Crankshaft End Play: .002"-.007"

Engine Tightening Specifications, 140 Cu. In. Engine:

Spark Plugs: 15 Ft. Lbs.

Cylinder Head Bolts: 60 Ft. Lbs.

Intake Manifold: 30 Ft. Lbs.

Exhaust Manifold: 30 Ft. Lbs.

Cam Cover: 35 Inch Lbs.

Connecting Rod Cap Bolts: 35 Ft. Lbs.

Main Bearing Cap Bolts: 65 Ft. Lbs.

Flywheel to Crankshaft: 60 Ft. Lbs.

Vibration Damper or Pulley: Pulley to Damper Screws: 80 Ft. Lbs.

Rear Axle Specifications:

Carrier Type: Integral

Ring Gear & Pinion Backlash:

Method: Shims

Adjustment: .005"-.008"

Pinion Bearing Preload:

Method: Spacer

New Bearings: 10-25 Inch Lbs.

Used Bearings: 8-12 Inch Lbs.

Differential Bearing Preload:

Method: Shims

Brake Specifications:

Brake Drum Diameter: 9.000"

Wheel Cylinder Bore:

Front Disc Brakes: 1-7/8"

Rear: 3/4"

Master Cylinder Bore:

Disc Brakes: 3/4"

Power Brakes: 3/4"

Wheel Alignment Specifications:

Caster: -3/4 Degree

Camber:

Left: +1/4 Degrees

Right: +1/4 Degrees

Toe In: 3/16"-5/16"

Alternator Specifications:

Model: 1100545

Rated Hot Output: 32 Amperes

Field Current, 12 Volts @ 80 Degrees: 4.0 to 4.5 Amperes

Cold Output @ 14 Volts:

5,000 RPM: 31 Amperes

Regulator: Integral

Model: 1100546

Rated Hot Output: 55 Amperes

Field Current, 12 Volts @ 80 Degrees: 4.0 to 4.5 Amperes

Cold Output @ 14 Volts:

5,000 RPM: 50 Amperes

Regulator: Integral

Model: 1100559

Rated Hot Output: 32 Amperes

Field Current, 12 Volts @ 80 Degrees: 4.0 to 4.5 Amperes

Cold Output @ 14 Volts:

5,000 RPM: 31 Amperes

Regulator: Integral

Model: 1100560

Rated Hot Output: 55 Amperes

Field Current, 12 Volts @ 80 Degrees: 4.0 to 4.5 Amperes

Cold Output @ 14 Volts:

5,000 RPM: 50 Amperes

Regulator: Integral

Distributor Specifications:

Distributor #1110496

Centrifugal Advance Data:

Advance Starts: 0 Degrees @ 800 RPM

Intermediate Advance: 1 Degree @ 875 RPM

Intermediate Advance: 6 Degrees @ 1,600 RPM

Full Advance: 11 Degrees @ 2,400 RPM

Vacuum Advance Data:

Inches of Vacuum to Start Plunger Movement: 7-1/2 Inches

Maximum Vacuum Advance: 12 Degrees @ 15" Vacuum

Starting Motor Data:

Standard Transmission:

Starter # 1108195

Free Speed Test: 50-75 Amperes, 9 Volts, @ 6,500-10,000 RPM

Torque Test: 435-535 Amperes, 3.0 Volts

Automatic Transmission:

Starter # 1108196

Free Speed Test: 50-75 Amperes, 9 Volts, @ 6,500-10,000 RPM

Torque Test: 435-535 Amperes, 3.0 Volts

Carburetor Data:

Rochester Carburetor Adjustments:

Note: Carburetors listed below include other models than the Vega.

Rochester Type M & MV:

Carburetor #: 7044014

Float Level: 11/32"

Metering Rod: .070"

Choke Rod: .230"

Vacuum Break: .275"

Unloader: .500"

Fast Idle Speed: 1,800 RPM

Rochester Type M & MV:

Carburetor #: 7044017

Float Level: 11/32"

Metering Rod: .070"

Choke Rod: .275"

Vacuum Break: .350"

Unloader: .500"

Fast Idle Speed: 1,800 RPM

Rochester Type M & MV:

Carburetor #: 7044023

Float Level: 1/8"

Choke Rod: .080"

Vacuum Break: .130"

Unloader: .375"

Fast Idle Speed: 2,000 RPM

Rochester Type M & MV:

Carburetor #: 7044024

Float Level: 1/8"

Choke Rod: .080"

Vacuum Break: .130"

Unloader: .375"

Fast Idle Speed: 2,200 RPM

Rochester Type M & MV:

Carburetor #: 7044033

Float Level: 1/8"

Choke Rod: .080"

Vacuum Break: .130"

Unloader: .375"

Fast Idle Speed: 2,000 RPM

Rochester Type M & MV:

Carburetor #: 7044034

Float Level: 1/8"

Choke Rod: .080"

Vacuum Break: .130"

Unloader: .375"

Fast Idle Speed: 2,200 RPM

Rochester Type M & MV:

Carburetor #: 7044314

Float Level: 11/32"

Choke Rod: .245"

Vacuum Break: .300"

Unloader: .500"

Fast Idle Speed: 1,800 RPM

Rochester Type M & MV:

Carburetor #: 7044323

Float Level: 1/8"

Choke Rod: .080"

Vacuum Break: .130"

Unloader: .375"

Fast Idle Speed: 2,200 RPM

Rochester Type M & MV:

Carburetor #: 7044324

Float Level: 1/8"

Choke Rod: .080"

Vacuum Break: .130"

Unloader: .375"

Fast Idle Speed: 2,000 RPM

Rochester Type M & MV:

Carburetor #: 7044333

Float Level: 1/8"

Choke Rod: .080"

Vacuum Break: .130"

Unloader: .375"

Fast Idle Speed: 2,000 RPM

Rochester Type M & MV:

Carburetor #: 7044334

Float Level: 1/8"

Choke Rod: .080"

Vacuum Break: .130"

Unloader: .375"

Fast Idle Speed: 2,200 RPM

Rochester Type M & MV:

Carburetor #: 7044336

Float Level: 1/8"

Choke Rod: .245"

Vacuum Break: .300"

Unloader: .500"

Fast Idle Speed: 1,800 RPM

Rochester Type M & MV:

Carburetor #: 7044337

Float Level: 1/8"

Metering Rod: .080"

Choke Rod: .080"

Vacuum Break: .130"

Unloader: .375"

Fast Idle Speed: 2,000 RPM

Rochester Type M & MV:

Carburetor #: 7044339

Float Level: 1/8"

Choke Rod: .245"

Vacuum Break: .300"

Unloader: .500"

Fast Idle Speed: 1,800 RPM

Rochester Type M & MV:

Carburetor #: 7044340

Float Level: 1/8"

Metering Rod: .080"

Choke Rod: .080"

Vacuum Break: .130"

Unloader: .375"

Fast Idle Speed: 2,200 RPM

Rochester Type 2G, 2GC, & 2GV:

Carburetor #: 7044111

Float Level: 19/32"

Float Drop: 1-9/32"

Pump Rod: 1-21/32"

Vacuum Break: .140"

Choke Rod: .200"

Choke Unloader: .250"

Fast Idle Speed: 1,600 RPM

Carburetor #: 7044112

Float Level: 19/32"

Float Drop: 1-9/32"

Pump Rod: 1-9/16"

Vacuum Break: .130"

Choke Rod: .245"

Choke Unloader: .325"

Fast Idle Speed: 1,600 RPM

Carburetor #: 7044113

Float Level: 19/32"

Float Drop: 1-9/32"

Pump Rod: 1-21/32"

Vacuum Break: .140"

Choke Rod: .200"

Choke Unloader: .250"

Fast Idle Speed: 1,600 RPM

Carburetor #: 7044114

Float Level: 19/32"

Float Drop: 1-9/32"

Pump Rod: 1-9/16"

Vacuum Break: .130"

Choke Rod: .245"

Choke Unloader: .325"

Fast Idle Speed: 1,600 RPM

Carburetor #: 7044115

Float Level: 19/32"

Float Drop: 1-9/32"

Pump Rod: 1-21/32"

Vacuum Break: .140"

Choke Rod: .200"

Choke Unloader: .250"

Fast Idle Speed: 1,600 RPM

Carburetor #: 7044116

Float Level: 19/32"

Float Drop: 1-9/32"

Pump Rod: 1-9/16"

Vacuum Break: .130"

Choke Rod: .245"

Choke Unloader: .325"

Fast Idle Speed: 1,600 RPM

Carburetor #: 7044117

Float Level: 19/32"

Float Drop: 1-9/32"

Pump Rod: 1-9/16"

Vacuum Break: .140"

Choke Rod: .245"

Choke Unloader: .325"

Fast Idle Speed: 1,600 RPM

Carburetor #: 7044118

Float Level: 19/32"

Float Drop: 1-9/32"

Pump Rod: 1-9/16"

Vacuum Break: .130"

Choke Rod: .245"

Choke Unloader: .325"

Fast Idle Speed: 1,600 RPM

Carburetor #: 7044120

Float Level: 19/32"

Float Drop: 1-9/32"

Pump Rod: 1-21/32"

Vacuum Break: .130"

Choke Rod: .200"

Choke Unloader: .250"

Fast Idle Speed: 1,600 RPM

Carburetor #: 7044121

Float Level: 19/32"

Float Drop: 1-9/32"

Pump Rod: 1-21/32"

Vacuum Break: .140"

Choke Rod: .200"

Choke Unloader: .250"

Fast Idle Speed: 1,600 RPM

Carburetor #: 7044123

Float Level: 19/32"

Float Drop: 1-9/32"

Pump Rod: 1-21/32"

Vacuum Break: .140"

Choke Rod: .200"

Choke Unloader: .250"

Fast Idle Speed: 1,600 RPM

Carburetor #: 7044124

Float Level: 19/32"

Float Drop: 1-9/32"

Pump Rod: 1-21/32"

Vacuum Break: .130"

Choke Rod: .245"

Choke Unloader: .325"

Fast Idle Speed: 1,600 RPM

Carburetor #: 7044125

Float Level: 19/32"

Float Drop: 1-9/32"

Pump Rod: 1-21/32"

Vacuum Break: .140"

Choke Rod: .200"

Choke Unloader: .250"

Fast Idle Speed: 1,600 RPM

Carburetor #: 7044126

Float Level: 19/32"

Float Drop: 1-9/32"

Pump Rod: 1-21/32"

Vacuum Break: .140"

Choke Rod: .200"

Choke Unloader: .250"

Fast Idle Speed: 1,600 RPM

Carburetor #: 7044127

Float Level: 19/32"

Float Drop: 1-9/32"

Pump Rod: 1-21/32"

Vacuum Break: .140"

Choke Rod: .200"

Choke Unloader: .250"

Fast Idle Speed: 1,700 RPM

Carburetor #: 7044129

Float Level: 19/32"

Float Drop: 1-9/32"

Pump Rod: 1-21/32"

Vacuum Break: .140"

Choke Rod: .200"

Choke Unloader: .250"

Fast Idle Speed: 1,600 RPM

Chevrolet Paint Colors & Codes:

Code Color Name

11 Antique White

13 Cosworth Silver

19 Texedo Black

24 Light Blue

25 Medium Blue

26 Dark Blue

29 Midnight Blue

36 Aqua Blue

40 Lime Yellow

44 Medium Green

46 Bright Green

47 Medium Green

49 Midnight Dark Green

50 Cream Beige

51 Bright Yellow

53 Light Gold

55 Sandstone

59 Golden Brown

64 Silver

66 Bronze

67 Bright Orange

69 Dark Taupe

74 Medium Red

75 Medium Red

81 Beige

86 Bright Orange

Popular Options:

Power Steering; Air Conditioning; AM Radio; GT Package, Vinyl Top; Automatic Transmission, and more.

1974 Chevrolet Vega Historical Data:

The 1974 Chevrolet model year introduction was on September 22, 1973.

Total 1974 Chevrolet Vega Production was 452,888.

Promotional Model Cars:

Plastic: Vega Coupe.