1957 CORVETTE

1957 CORVETTE

General Specifications

Chasis:

Wheelbase: 102"

Overall Length: 168"

Tire Size: 6.70 x 15 inches

Body Data:

8 Cylinder:

2 Door Convertible, 2 Passenger, Model #2934

Base Price: $3,465; Shipping Weight: 2,730 Pounds;

Production Total: 6,339

8 Cylinder Engine Specifications:

220 HP Engine:

Engine Type: V-Type 8 Cylinder, Overhead Valve

Bore & Stroke: 3-7/8" x 3"

Engine Displacement: 283 Cu. In.

Compression Ratio: 9.5 to 1;

Taxable Horsepower: 48.05

Horsepower: 220 @ 4,800 RPM

Maximum Torque: 300 Ft Lbs @ 3,000 RPM

Normal Oil Pressure: 35 PSI

4 Barrel Carburetor

245 HP Engine:

Engine Type: V-Type 8 Cylinder, Overhead Valve

Bore & Stroke: 3-7/8" x 3"

Engine Displacement: 283 Cu. In.

Compression Ratio: 9.5 to 1;

Taxable Horsepower: 48.05

Horsepower: 245 @ 5,000 RPM

Maximum Torque: 300 Ft Lbs @ 3,800 RPM

Normal Oil Pressure: 35 PSI

Two, 4 Barrel Carburetors

250 HP Engine:

Engine Type: V-Type 8 Cylinder, Overhead Valve

Bore & Stroke: 3-7/8" x 3"

Engine Displacement: 283 Cu. In.

Compression Ratio: 9.5 to 1;

Taxable Horsepower: 48.05

Horsepower: 250 @ 5,000 RPM

Maximum Torque: 305 Ft Lbs @ 3,800 RPM

Normal Oil Pressure: 35 PSI

Fuel Injection

270 HP Engine:

Engine Type: V-Type 8 Cylinder, Overhead Valve

Bore & Stroke: 3-7/8" x 3"

Engine Displacement: 283 Cu. In.

Compression Ratio: 9.5 to 1;

Taxable Horsepower: 48.05

Horsepower: 270 @ 6,000 RPM

Maximum Torque: 285 Ft Lbs @ 4,200 RPM

Normal Oil Pressure: 35 PSI

Two, 4 Barrel Carburetors

283 HP Engine:

Engine Type: V-Type 8 Cylinder, Overhead Valve

Bore & Stroke: 3-7/8" x 3"

Engine Displacement: 283 Cu. In.

Compression Ratio: 10.5 to 1;

Taxable Horsepower: 48.05

Horsepower: 283 @ 6,200 RPM

Maximum Torque: 290 Ft Lbs @ 4,400 RPM

Normal Oil Pressure: 35 PSI

Fuel Injection

Available Axle Ratios:

3.70:1; 4,11:1; 4.56:1

1957 CORVETTE

Tune Up Specifications:

8 Cylinder Engine:

Ground Polarity: Negative

Voltage: 12 Volts

Spark Plug: AC 44

Spark Plug Gap .035"

Point Gap: Turn adjusting screw in until engine misfires, then back off 1/2 turn.

Distributor Cam Angle: 30 Degrees

Firing Order: 1-8-4-3-6-5-7-2

Ignition Timing: 2nd Line Before "O" Mark on Damper

Engine Idle Speed: 425 RPM

Cylinder Head Torque: 60-70 Ft. Lbs

Compression @ Cranking Speed - 150 Lb

Valve Specifications:

8 Cylinder Engine, With Mechanical Lifters & Two 4 Barrel Carburetors:

Operating (Tappet) Clearance, Hot:

Intake .012"

Exhaust .018"

Valve Seat Angle: 45 degrees

Valve Timing:

Intake Opens 35 Degree Before Top Dead Center

Exhaust Closes 31 Degrees After Top Dead Center

Valve Spring Pressure: 69 Lbs @ 1.696"

Fale Lift, Zero Lash:

Intake: .398"

Exhaust: .398"

Valve Stem Clearance:

Intake .001-.003

Exhaust .0015-.003

Valve Stem Diameter:

Intake: .3415"-.3422"

Exhaust: .3410"-.3417"

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

8 Cylinder Engine:

Fitting Pistons:

Shim Thickness to Use: .0015"

Pounds Pull On Scale: 7 to 18

Ring End Gap:

Compression: .009"

Oil: .005

Wrist Pin Diameter: .9271"

Rod Bearings:

Shaft Diameter: 1.999"-2.000"

Rod Bearing Clearance: .001"-.003"

Rod End Play: .008-.014

Rod Bolt Torque: 30-35 Ft. Lbs.

Main Bearings:

Shaft Diameter: 2.2978"-2.2988"

Main Bearing Clearance: .001"-.003"

Crankshaft End Play: .002"-.006"

Rod Bolt Torque: 60-70 Ft. Lbs

Capacities:

8 Cylinder Engine:

Cooling System:

Without Heater: 16 Quarts

With Heater: 17 Quarts

Radiator Cap Pressure: 6-1/4 to 7-1/2 PSI

Fuel Tank: 16 Gallons;

Engine Oil Refill: 4 Qts*

Manual Transmission: 2 Pints

Automatic Transmission: 3-1/2 Qts

Rear Axle: 3-1/2 Pints;

* Add One Quart for Filter

Generators:

8 Cylinder Engine:

#1102043

Rotation: Clockwise

Generator Output: 30 Amps @ 2,310 RPM

Brush Spring Tension: 28 Ounces

Field Current @ 12 Volts: 1.48-1.62 Volts

Regulator #1119001

Cutout Relay:

Voltage to Close Points: 12.6

Armature Air Gap: .020"

Voltage Regulator Setting: 14.3 Volts

Current Regulator Setting: 30 Amperes

Current & Voltage Armature Air Gap: .075"

Ground Polarity: Negative

Distributors:

8 Cylinder Engine:

#1110891

Clockwise Rotation

Cam Angle: 30 Degrees

Point Gap: Turn adjusting screw in until engine misfires, then back off 1/2 turn

Condensor .18-.23 Mfds.

Breaker Arm Tension: 19-23 Ounces

Centrifugal Advance Data:

Advance Starts: 1-1/2 Degree @ 400 RPM

Full Advance: 14 Degrees @ 1,850 RPM

Starting Motors:

8 Cylinder:

#1107660, 1107664

Clockwise Rotation

Brush Tension: 35 Ounces (Minimum)

No Load Test: 49-76 Amps, 10.6 Volts @ 6,200-9,400 RPM

Torque Test: 270-310 Amps, 4.25 Volts. Torque 10-1/2 Ft Lb

Rear Axle & Brake Specifications:

Ring Gear Pinion Backlash: .005"-.009"

Drive Pinion Adjustment: Shims

Drive Pinion Bearing Adjustment: None

Axle Shaft End Play: Controlled by Bearing Retainer Ring

Wheel Cylinder Bore:

Front 1-1/8"

Rear: 1"

Master Cylinder Bore: 1"

Wheel Alignment Specifictions:

Caster: +1/2

Camber: +1/2

Toe In: 0 to 1/8""

Toe Out on Turns:

Outer Wheel: 20 Degrees

Inner Wheel: 23 Degrees

Kingpin Angle: 3-1/2 Degrees to 4-1/2 Degrees

Carburetor Types:

8 Cylinder Engine:

Carter WCFB

Carburetor #2626S

Idle Screw, Turns to Open: 1/4 to 1-1/4 Turns

Float Level:

Primary: 1/8"

Secondary: 1/4"

Float Drop:

Primary: 5/8"

Secondary: 3/4"

Fast Idle: None

Unloader: None

Bowl Vapor Vent: 1/16"

Secondary Throttle Lever: .017"-.022"

Automatic Choke Setting: None

Carter WCFB

Carburetor #2627S

Idle Screw, Turns to Open: 1/4 to 1-1/4 Turns

Float Level:

Primary: 1/8"

Secondary: 1/4"

Float Drop:

Primary: 5/8"

Secondary: 3/4"

Fast Idle: .018"

Unloader: 1/8"

Bowl Vapor Vent: 1/16"

Secondary Throttle Lever: .017"-.022"

Automatic Choke Setting: Index

Carter WCFB

Carburetor #2655S

Idle Screw, Turns to Open: 1/2 to 1-1/2 Turns

Float Level:

Primary: 1/8"

Secondary: 1/4"

Float Drop:

Primary: 5/8"

Secondary: 3/4"

Fast Idle: .015"

Unloader: 3/16"

Bowl Vapor Vent: 1/16"

Secondary Throttle Lever: .017"-.022"

Automatic Choke Setting: Index

VIN Numbers:

E57S100001 - E57S106339

Popular Options:

Signal Seeking AM Radio; Heater; Windshield Washer; Parking Brake Alarm; Courtesy Lights, Turn Signals; Powerglide Automatic Transmission, White Sidewall Tires, Auxiliary Top, Power Windows, Posi-Traction Axle, Various Engine Options, Two Tone Paint.

Paint Colors:

Onyx Black

Axtec Copper

Cascde Green

Arctic Blue

Venetian Red

Polo White

Inca Silver

1957 Corvette Promotional Model Cars Available:

None

1957 Corvette Historical Data:

1957 Corvette model year introduction date was in October 1956.

Model Year Production: 6,339 Cars