1970 CORVETTE

1970 CORVETTE

General Specifications

Chasis:

Wheelbase: 98"

Overall Length: 182.5"

Tire Size: F70 x 15 inches

Body Data:

Sting Ray, 8 Cylinder:

2 Door Fastback Coupe, 2 Passenger, Series #194; Body #37

Base Price: $5,469; Shipping Weight: 3,153 Pounds;

Production Total: 10,668

2 Door Convertible, 2 Passenger, Series #194; Body #67

Base Price: $5,129; Shipping Weight: 3,167 Pounds;

Production Total: 6,648

8 Cylinder Engine Specifications:

300 HP Engine:

Engine Type: V-Type 8 Cylinder, Overhead Valve

Bore & Stroke: 4.001" x 3.48"

Engine Displacement: 350 Cu. In.

Compression Ratio: 10.25 to 1;

Taxable Horsepower: 51.23

Horsepower: 300 @ 4,800 RPM

Maximum Torque: 380 Ft Lbs @ 3,200 RPM

Normal Oil Pressure: 30-45 PSI

One, 4 Barrel Carburetor

350 HP Engine:

Engine Type: V-Type 8 Cylinder, Overhead Valve

Bore & Stroke: 4.001" x 3.48"

Engine Displacement: 350 Cu. In.

Compression Ratio: 11.0 to 1;

Taxable Horsepower: 51.23

Horsepower: 350 @ 5,600 RPM

Maximum Torque: 380 Ft Lbs @ 3,600 RPM

Normal Oil Pressure: 30-45 PSI

One, 4 Barrel Carburetor

370 HP Engine:

Engine Type: V-Type 8 Cylinder, Overhead Valve

Bore & Stroke: 4.001" x 3.48"

Engine Displacement: 350 Cu. In.

Compression Ratio: 11.0 to 1;

Taxable Horsepower: 51.23

Horsepower: 370 @ 6,000 RPM

Maximum Torque: 380 Ft Lbs @ 4,000 RPM

Normal Oil Pressure: 30-45 PSI

One, 4 Barrel Carburetor

390 HP Engine:

Engine Type: V-Type 8 Cylinder, Overhead Valve

Bore & Stroke: 4.251" x 4.00"

Engine Displacement: 454 Cu. In.

Compression Ratio: 10.25 to 1;

Taxable Horsepower: 57.80

Horsepower: 390 @ 4,800 RPM

Maximum Torque: 500 Ft Lbs @ 3,400 RPM

Normal Oil Pressure: 30-35 PSI

One, 4 Barrel Carburetor

460 HP Engine:

Engine Type: V-Type 8 Cylinder, Overhead Valve

Bore & Stroke: 4.25" x 4.00"

Engine Displacement: 454 Cu. In.

Compression Ratio: 11.25 to 1;

Taxable Horsepower: 57.80

Horsepower: 460 @ 5,600 RPM

Maximum Torque: 490 Ft Lbs @ 3,000 RPM

Normal Oil Pressure: 30-35 PSI

Three Carburetors

Available Axle Ratios:

2.73:1; 3.08:1; 3.36:1; 3.55:1; 4.11:1; 4.56:1

1970 CORVETTE

Tune Up Specifications:

8 Cylinder 350 Cu. In. Engine, 300 HP:

Spark Plug: AC R44

Spark Plug Gap .035"

Point Gap: .019"

Distributor Cam Angle: 29-31 Degrees

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

Ignition Timing: 4 Degrees BTDC on Damper

Engine Idle Speed:

Standard Transmission: 700 RPM

Automatic Transmission: 600 RPM

Fuel Pump Pressure: 7-1/2 to 9 PSI

8 Cylinder 350 Cu. In. Engine, 350 HP:

Spark Plug: AC R44

Spark Plug Gap .035"

Point Gap: .019"

Distributor Cam Angle: 28-32 Degrees

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

Ignition Timing: 8 Degrees BTDC on Damper

Engine Idle Speed:

Standard Transmission: 750 RPM

Fuel Pump Pressure: 7-1/2 to 9 PSI

8 Cylinder 350 Cu. In. Engine, 370 HP:

Spark Plug: AC R44

Spark Plug Gap .035"

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

Ignition Timing: 8 Degrees BTDC on Damper

Engine Idle Speed:

Standard Transmission: 900 RPM

Fuel Pump Pressure: 7-1/2 to 9 PSI

8 Cylinder 454 Cu. In. Engine, 390 HP:

Spark Plug: AC R43N

Spark Plug Gap .035"

Point Gap: .019"

Dwell Angle: 28-32 Degrees

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

Ignition Timing: 6 Degrees BTDC on Damper

Engine Idle Speed:

Standard Transmission: 700 RPM

Automatic Transmission: 600 RPM in Drive

Fuel Pump Pressure: 7-1/2 to 9 PSI

8 Cylinder 454 Cu. In. Engine, 460 HP:

Spark Plug: AC R43XL

Spark Plug Gap .035"

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

Ignition Timing: 8 Degrees BTDC on Damper

Engine Idle Speed:

Standard Transmission: 700 RPM

Automatic Transmission: 600 RPM in Drive

Fuel Pump Pressure: 7-1/2 to 9 PSI

Valve Specifications:

8 Cylinder Engine, 350 Cu. In., Except 370 H.P.:

Operating (Tappet) Clearance, Hot:

Intake: 1 Turn

Exhaust: 1 Turn

Valve Seat Angle:

Seat: 46 Degrees

Face 45 Degrees

Valve Spring Height Installed: 1.70"

Valve Spring Pressure: 200 Lbs @ 1.25"

Valve Stem Clearance:

Intake .001"-.0027"

Exhaust .0012"-.0029"

Valve Stem Diameter:

Intake: .3410"-.3417"

Exhaust: .3410"-.3417"

8 Cylinder Engine, 350 Cu. In., 370 H.P.:

Operating (Tappet) Clearance, Hot:

Intake: .024"

Exhaust: .025"

Valve Seat Angle:

Seat: 46 Degrees

Face 45 Degrees

Valve Spring Height Installed: 1.70"

Valve Spring Pressure: 200 Lbs @ 1.25"

Valve Stem Clearance:

Intake .001"-.0027"

Exhaust .0012"-.0029"

Valve Stem Diameter:

Intake: .3410"-.3417"

Exhaust: .3410"-.3417"

8 Cylinder Engine, 454 Cu. In., 390 H.P.:

Operating (Tappet) Clearance, Hot:

Intake: 1 Turn

Exhaust: 1 Turn

Valve Seat Angle:

Seat: 46 Degrees

Face 45 Degrees

Valve Spring Height Installed: 1.88"

Valve Spring Pressure: 240 Lbs @ 1.38"

Valve Stem Clearance:

Intake .001"-.0027"

Exhaust .0012"-.0027"

Valve Stem Diameter:

Intake: .3715"-.3722"

Exhaust: .3713"-.3722"

8 Cylinder Engine, 454 Cu. In., 460 H.P.:

Operating (Tappet) Clearance, Hot:

Intake: .024"

Exhaust: .028"

Valve Seat Angle:

Seat: 46 Degrees

Face 45 Degrees

Valve Spring Height Installed: 1.88"

Valve Spring Pressure: 240 Lbs @ 1.38"

Valve Stem Clearance:

Intake .001"-.0027"

Exhaust .0012"-.0027"

Valve Stem Diameter:

Intake: .3715"-.3722"

Exhaust: .3717"-.3722"

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

8 Cylinder Engine, 350 Cu. In., 300 H.P.:

Piston Clearance: .0007"-.0013"

Ring End Gap:

Compression: .010"

Oil: .015

Wrist Pin Diameter: .927"

Rod Bearings:

Shaft Diameter: 2.099"-2.100"

Rod Bearing Clearance: .0007"-.0028"

Main Bearings:

Shaft Diameter:

#1, 2, 3, & 4: 2.4484"-2.4493"

#5: 2.4479"-2.4488"

Main Bearing Clearance:

#1: .0003"-.0015"

#, 2, 3, & 4: .0006"-.0018"

#5, .0008"-.0023"

Thrust on Rear Bearing: #5

Crankshaft End Play: .002"-.006"

8 Cylinder Engine, 350 Cu. In., 350 H.P.:

Piston Clearance: .0020"-.0026"

Ring End Gap:

Compression: .010"

Oil: .015

Wrist Pin Diameter: .927"

Rod Bearings:

Shaft Diameter: 2.099"-2.100"

Rod Bearing Clearance: .0007"-.0028"

Main Bearings:

Shaft Diameter:

#1, 2, 3, & 4: 2.4484"-2.4493"

#5: 2.4479"-2.4488"

Main Bearing Clearance:

#1: .0003"-.0015"

#, 2, 3, & 4: .0006"-.0018"

#5, .0008"-.0023"

Thrust on Rear Bearing: #5

Crankshaft End Play: .002"-.006"

8 Cylinder Engine, 350 Cu. In., 370 H.P.:

Piston Clearance: .0036"-.0042"

Ring End Gap:

Compression: .010"

Oil: .015

Wrist Pin Diameter: .927"

Rod Bearings:

Shaft Diameter: 2.099"-2.100"

Rod Bearing Clearance: .0007"-.0028"

Main Bearings:

Shaft Diameter:

#1, 2, 3, & 4: 2.4484"-2.4493"

#5: 2.4479"-2.4488"

Main Bearing Clearance:

#1: .0003"-.0015"

#, 2, 3, & 4: .0006"-.0018"

#5, .0008"-.0023"

Thrust on Rear Bearing: #5

Crankshaft End Play: .002"-.006"

8 Cylinder Engine, 454 Cu. In.:

Piston Clearance: .0024"-.0034"

Ring End Gap:

Compression: .017"

Oil: .010"

Wrist Pin Diameter: .989"

Rod Bearings:

Shaft Diameter: 2.199"-2.200"

Rod Bearing Clearance: .0009"-.0025"

Main Bearings:

Shaft Diameter:

#1: 2.7484"-2.7493"

2, 3, & 4: 2.7481"-2.7490"

#5: 2.7478"-2.7488"

Main Bearing Clearance:

#1, 2, 3, & 4: .0013"-.0025"

#5: .0024"-.0040"

Thrust on Rear Bearing: #5

Crankshaft End Play: .006"-.010"

Capacities:

350 Cu. In. Engine, Except 370 H.P.:

Cooling System:

Without Heater: 14 Quarts

With Heater: 15 Quarts

With Air Conditioning: 21 Quarts

Radiator Cap Pressure:

With Air Conditioning: 15 PSI

Without Air Conditioning: 15 PSI

Thermostat Opening Temperature: 195 Degrees

Fuel Tank: 20 Gallons

Engine Oil Refill: 5 Quarts with New Filter

Transmission Oil:

4 Speed Manual: 3 Pints

Automatic Transmission:

Refill: 1-1/2 Quarts

Total Capacity: 7-1/2 Quarts

Rear Axle: 4 Pints

350 Cu. In. Engine, 370 H.P.:

Cooling System:

Without Heater: 17 Quarts

With Heater: 18 Quarts

With Air Conditioning: 22 Quarts

Radiator Cap Pressure:

With Air Conditioning: 15 PSI

Without Air Conditioning: 15 PSI

Thermostat Opening Temperature: 180 Degrees

Fuel Tank: 20 Gallons

Engine Oil Refill: 5 Quarts with New Filter

Transmission Oil:

4 Speed Manual: 3 Pints

Automatic Transmission:

Refill: 1-1/2 Quarts

Total Capacity: 7-1/2 Quarts

Rear Axle: 4 Pints

454 Cu. In. Engine:

Cooling System:

Without Heater: 21 Quarts

With Heater: 22 Quarts

Radiator Cap Pressure:

With Air Conditioning: 15 PSI

Without Air Conditioning: 15 PSI

Thermostat Opening Temperature: 195 Degrees

Fuel Tank: 20 Gallons

Engine Oil Refill: 6 Quarts with New Filter

Transmission Oil

4 Speed Manual: 3 Pints

Automatic Transmission:

Refill: 1-1/2 Quarts

Total Capacity: 7-1/2 Quarts

Rear Axle: 4.0 Pints

Engine Tightening Specifications:

350 Cu. In. 8 Cylinder:

Spark Plugs: 25 Ft. Lbs

Cylinder Head Bolts: 65 Ft. Lbs.

Intake Manifold: 30 Ft. Lbs.

Exhaust Manifold:

Outside Bolts: 20 Ft. Lbs

Inside Bolts: 30 Ft. Lbs.

Rocker Arm Cover: 55 Inch Lbs.

Connecting Rod Cap Bolts: 45 Ft. Lbs.

Main Bearing Cap Bolts: 75 Ft. Lbs.

Flywheel to Crankshaft: 60 Ft. Lbs

Vibration Damper: 60 Ft. Lbs.

454 Cu. In. 8 Cylinder:

Spark Plugs: 15 Ft. Lbs

Cylinder Head Bolts: 80 Ft. Lbs.

Intake Manifold: 30 Ft. Lbs.

Exhaust Manifold: 20 Ft. Lbs

Rocker Arm Stud: 50 Ft. Lbs.

Rocker Arm Cover: 50 Inch Lbs.

Connecting Rod Cap Bolts: 50 Ft. Lbs

Main Bearing Cap Bolts: 105 Ft. Lbs.

Flywheel to Crankshaft: 65 Ft. Lbs

Vibration Damper: 85 Ft. Lbs.

Alternators:

8 Cylinder Engine:

#1100900

Rated Hot Output: 42 Amperes

Voltage Regulator: Integral

#1100901

Rated Hot Output: 42 Amperes

Voltage Regulator: Integral

Distributors:

8 Cylinder Engine:

#1111490

Point Gap: .019"

Cam Angle: 28-32 Degrees

Breaker Arm Tension: 19-23 Ounces

Centrifugal Advance Data:

Advance Starts: 0 Degrees @ 450 RPM

Full Advance: 16 Degrees @ 2,550 RPM

Vacuum Advance Data:

Inches of Vacuum to Start Plunger: 8"

Maximum Vacuum Advance: 9-1/2 Degrees @ 17" Vacuum

#1111491

Centrifugal Advance Data:

Advance Starts: 0 Degrees @ 500 RPM

Full Advance: 13 Degrees @ 2,500 RPM

Vacuum Advance Data:

Inches of Vacuum to Start Plunger: 8

Maximum Vacuum Advance: 7-1/2 Degrees @ 12Vacuum

#1111493

Point Gap: .019"

Cam Angle: 28-32 Degrees

Breaker Arm Tension: 19-23 Ounces

Centrifugal Advance Data: N/A

Vacuum Advance Data:

Inches of Vacuum to Start Plunger: 7

Maximum Vacuum Advance: 7-1/2 Degrees @ 12" Vaccuum

#1112026

Centrifugal Advance Data:

Advance Starts: 0 Degrees @ 500 RPM

Full Advance: 10-1/2 Degrees @ 1,150 RPM

Centrifugal Advance Data:

Advance Starts: 0 Degrees @ 500 RPM

Full Advance: 10-1/2 Degrees @ 1,150 RPM

Vacuum Advance Data:

Inches of Vacuum to Start Plunger: 7

Maximum Vacuum Advance: 6 Degrees @ 12" Vaccuum

#1111464

Point Gap: .019"

Cam Angle: 28-30 Degrees

Breaker Arm Tension: 28-32 Ounces

Centrifugal Advance Data:

Advance Starts: 0 Degrees @ 545 RPM

Full Advance: 11 Degrees @ 1,600 RPM

Vacuum Advance Data:

Inches of Vacuum to Start Plunger: 7"

Maximum Vacuum Advance: 8 Degrees @ 12" Vacuum

Starting Motors:

8 Cylinder, 350 Cu. In. Engine:

#1108338

Brush Tension: 35 Ounces (Minimum)

No Load Test: 55-80 Amps, 9 Volts @ 3,500-6,000 RPM

#1108427

Brush Tension: 35 Ounces (Minimum)

No Load Test: 55-80 Amps, 9 Volts @ 3,500-6,000 RPM

8 Cylinder, 454 Cu. In. Engines:

#1107351

Brush Tension: 35 Ounces (Minimum)

No Load Test: 65-95 Amps, 9 Volts @ 7,500-10,500 RPM

8 Cylinder, 427 Cu. In. Engines:

#1108400

Brush Tension: 35 Ounces (Minimum)

No Load Test: 65-95 Amps, 9 Volts @ 7,500-10,500 RPM

Brake Specifications:

Wheel Cylinder Bore:

Disk Brake:

Front 1-7/8"

Rear: 1-3/8"

Master Cylinder Bore: 1"

Rear Axle Specifications:

Carrier Type: Integral

Ring Gear & Pinion Backlash:

Method: Check with Dial Gauge

Adjustment: .005"-.008"

Pinion Bearing Preload:

Method: Spacer

New Bearing Adjustment: 20-25 Inch Lbs.

Used Bearing Adjustment: 5-10 Inch Lbs.

Differential Bearing Preload:

Method: Shims

New Bearing Adjustment: .010"

Used Bearing Adjustment: .010"

Wheel Alignment Specifictions:

Manual Steering:

Caster: + 1 Degrees

Camber: 3/4 Degrees

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

Toe Out on Turns:

Inner Wheel: 20 Degrees

Power Steering:

Caster: + 2-/14 Degrees

Camber: 3/4 Degrees

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

Toe Out on Turns:

Inner Wheel: 20 Degrees

Rear Wheel Alignment:

Camber: -7/8 Degrees

Toe In: 1/32" to 3/32"

Carburetor Types:

8 Cylinder Engines:

Holley Model #2300

Carburetor #$4055-A

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

Dry Float Level: .350"

Pump Setting: .015"

Fast Idle: .025"

Fast Idle Speed: 2,200 RPM

Choke Unloader Setting: .250"

Holley Model #2300

Carburetor #R4056-A

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

Dry Float Level: .350"

Pump Setting: .015"

Bowl Vent Clearance: .085"

Fast Idle: .025"

Fast Idle Speed: 2,200 RPM

Choke Unloader Setting: .250"

Holley Model #2300

Carburetor #R3659A

Dry Float Level: .350"

Holley Model 4160

Carburetor #R4053-A

Pump Lever Clearance: .015"

Choke Unloader Setting: .350""

Bowl Vent Clearance: .065"

Fast Idle:

Bench: .025"

On Car: 2,200 RPM

Choke Vacuum Break: .300"

Holley Model 4160

Carburetor #R4296-A

Pump Lever Clearance: .015"

Choke Unloader Setting: .350""

Fast Idle:

Bench: .025"

On Car: 2,200 RPM

Choke Vacuum Break: .350"

Holley Model 4160

Carburetor #R4054-A

Pump Lever Clearance: .015"

Choke Unloader Setting: .350""

Bowl Vent Clearance: .065"

Fast Idle:

Bench: .025"

On Car: 2,200 RPM

Choke Vacuum Break: .300"

Rochester Quatrajet

Carburetor #7029202

Float Level: 7/32"

Pump Rod:

Hole: Inner

Adjustment: 5/16"

Idle Vent: 3/8"

Fast Idle, Bench Adjustment: 2 Turns

Choke Rod: .100"

Vacuum Break: .180"

Air Valve Dashpot: .015"

Choke Unloader: .450"

Air Valve Lockout: .015"

Air Valve Valve Spring Wind-Up: 7/16"

Rochester Quatrajet

Carburetor #7029203

Float Level: 7/32"

Pump Rod:

Hole: Inner

Adjustment: 5/16"

Idle Vent: 3/8"

Fast Idle, Bench Adjustment: 2 Turns

Choke Rod: .100"

Vacuum Break: .245"

Air Valve Dashpot: .015"

Choke Unloader: .450"

Air Valve Lockout: .015"

Air Valve Valve Spring Wind-Up: 7/16"

Rochester Quatrajet

Carburetor #7029204

Float Level: 1/4"

Pump Rod:

Hole: Inner

Adjustment: 5/16"

Idle Vent: 3/8"

Fast Idle, Bench Adjustment: 2 Turns

Choke Rod: .100"

Vacuum Break: .180"

Air Valve Dashpot: .015"

Choke Unloader: .450"

Air Valve Lockout: .015"

Air Valve Valve Spring Wind-Up: 13/16"

Rochester Quatrajet

Carburetor #7029205

Float Level: 1/4"

Pump Rod:

Hole: Inner

Adjustment: 5/16"

Fast Idle, Bench Adjustment: 2 Turns

Choke Rod: .100"

Vacuum Break: .275"

Air Valve Dashpot: .020"

Choke Unloader: .450"

Air Valve Valve Spring Wind-Up: 13/16"

Rochester Quatrajet

Carburetor #7029207

Float Level: 3/16"

Pump Rod:

Hole: Inner

Adjustment: 5/16"

Idle Vent: 3/8"

Fast Idle, Bench Adjustment: 2 Turns

Choke Rod: .100"

Vacuum Break: .275"

Air Valve Dashpot: .015"

Choke Unloader: .450"

Air Valve Valve Spring Wind-Up: 13/16"

Rochester Quatrajet

Carburetor #7029215

Float Level: 1/4"

Pump Rod:

Hole: Inner

Adjustment: 5/16"

Idle Vent: 3/8"

Fast Idle, Bench Adjustment: 2 Turns

Choke Rod: .100"

Vacuum Break: .245"

Air Valve Dashpot: .015"

Choke Unloader: .450"

Air Valve Lockout: .015"

Air Valve Valve Spring Wind-Up: 13/16"

VIN Numbers:

194670S00001 - 194670S117316

194370S00001 - 194370S117316

Popular Options:

Leather Seats; Power Windows; Auxiliary Hardtop for Convertibles; Vinyl Cover for Auxiliary Hardtop; Rear Window Defroster; Air Conditioning; Posi-Traction Axle; Tilt-Telescopic Steering Wheel; Power Steering; Power Brakes; Special Heavy Duty Brakes; Automatic Transmission; Bright Metal Wheel Covers; AM-FM Radio; AM-FM Stereo Radio; White Stripe Tires; Various Engine Options.

Paint Colors:

Code Color

900 Classic Black

974 Monza Red

975 Marlboro Maroon

976 Mulsane Blue

979 Bridgehampton Blue

982 Donnybrookr Green

984 Daytona Yellow

986 Cortez Silver

991 Ontario Orange

992 Laguna Gray

993 Corvette Bronze

1970 Corvette Promotional Model Cars Available:

Plastic: Corvette Sting Ray Convertible; Corvette Sting Ray Coupe

1970 Corvette Historical Data:

1970 Corvette model year introduction date was on September, 18, 1969.

Model Year Production: 17,316 Cars