1970 Corvette

1970 Corvette Performance & Specifications

Powertrain, Steering, Brakes, Dimensions, & Suspension

The arrival of the 1970 Corvette happened somewhat later than was typical in the automotive manufacturing industry, due in part to the incredible sales backlog that had occurred during the 1969 model year and also due in part to the UAW (United Workers) strike, which delayed the new Corvette from reaching showrooms until February.

Read More: 1970 Chevrolet Corvette Research Center

1970 Corvette Specifications

1970 Corvette Main Specs

MODEL: 1970 Chevrolet Corvette
BODY STYLE: Two-door convertible/coupe, front engine, rear wheel drive
MANUFACTURING LOCATION: St. Louis, Missouri
CONSTRUCTION: Uniconstruction: fiberglass reinforced plastic (FRP or “fiberglass”) body, backboned by a steel cage outlining the passenger compartment. Principal members – underbody, front and rear end assemblies, dash panel and hinge pillars are bonded, riveted, or bolted together and to each other. Hood is plastic with bonded plastic reinforcement. Coupe: two removable roof panels and removable rear window. Frame: all welded, full length, ladder construction with 5 crossmembers. Side Rails and intermediate crossmembers box section; front crossmember box girder section. Eight body-mounting points.
VEHICLE NUMBERS (VIN): 194370S400001 – 194370S417316
ENGINE SUFFIX: CGW: 454 CUBIC INCH, 390 HORSEPOWER, AUTOMATIC TRANSMISSION
CRJ: 454 CUBIC INCH, 390 HORSEPOWER, AUTOMATIC TRANSMISSION, TRANSISTOR IGNITION
CRI: 454 CUBIC INCH, 390 HORSEPOWER, MANUAL TRANSMISSION, TRANSISTOR IGNITION
CTD: 350 CUBIC INCH, 300 HORSEPOWER, MANUAL TRANSMISSION
CTG: 350 CUBIC INCH, 300 HORSEPOWER, AUTOMATIC TRANSMISSION
CTH: 350 CUBIC INCH, 350 HORSEPOWER, MANUAL TRANSMISSION
CTJ: 350 CUBIC INCH, 350 HORSEPOWER, MANUAL TRANSMISSION, AIR CONDITION
CTK: 350 CUBIC INCH, 370 HORSEPOWER, MANUAL TRANSMISSION, TRANSISTOR IGNITION
CTL: 350 CUBIC INCH, 300 HORSEPOWER, MANUAL TRANSMISSION
CTM: 350 CUBIC INCH, 300 HORSEPOWER, AUTOMATIC TRANSMMISSION
CTN: 350 CUBIC INCH, 350 HORSEPOWER, MANUAL TRANSMMISSION
CTO: 350 CUBIC INCH, 350 HORSEPOWER, MANUAL TRANSMMISSION,AIR CONDITIONING
CTP: 350 CUBIC INCH, 350 HORSEPOWER, MANUAL TRANSMMISSION, TRANSISTOR IGNITION
CTQ: 350 CUBIC INCH, 350 HORSEPOWER, MANUAL TRANSMMISSION, AIR CONDITIONING, TRANSISTOR IGNITION
CTR: 350 CUBIC INCH, 370 HORSEPOWER, MANUAL TRANSMMISSION, TRANSISTOR IGNITION
CTU: 350 CUBIC INCH, 370 HORSEPOWER, MANUAL TRANSMMISSION, TRANSISTOR IGNITION
CTV: 350 CUBIC INCH, 370 HORSEPOWER (ZR1), MANUAL TRANSMMISSION
CZU: 454 CUBIC INCH, 390 HORSEPOWER, MANUAL TRANSMMISSION
ENGINE BLOCK NUMBER: 3970010, 350 CUBIC INCH, 300 HP, 350HP, 370HP
3963512, 454 CUBIC INCH, 390 HP
HEAD NUMBER: 3927186, 350 CUBIC INCH, 300HP, 350HP, 370HP
3927187, 350 CUBIC INCH, 350HP
3964290, 454 CUBIC INCH, 390HP
3973414, 350 CUBIC INCH, 370HP
CARBURETOR NUMBERS: ROCHESTER Q-jet #7040202: 350 CUBIC INCH, 300HP, AUTO
ROCHESTER Q-jet #7040203: 350 CUBIC INCH, 300HP, MANUAL
ROCHESTER Q-jet #7040204: 454 CUBIC INCH, 390HP, AUTO
ROCHESTER Q-jet #7040205: 454 CUBIC INCH, 390HP, MANUAL
ROCHESTER Q-jet #7040207: 350 CUBIC INCH, 350HP, MANUAL
ROCHESTER Q-jet #7040212: 350 CUBIC INCH, 300HP, AUTO
ROCHESTER Q-jet #7040213: 350 CUBIC INCH, 300HP, MANUAL
ROCHESTER Q-jet #7040502: 350 CUBIC INCH, 300HP, AUTO
ROCHESTER Q-jet #7040503: 350 CUBIC INCH, 300HP, MANUAL
ROCHESTER Q-jet #7040504: 454 CUBIC INCH, 390HP, AUTO
ROCHESTER Q-jet #7040505: 454 CUBIC INCH, 390HP, MANUAL
ROCHESTER Q-jet #7040507: 350 CUBIC INCH, 350HP, MANUAL
ROCHESTER Q-jet #7040513: 350 CUBIC INCH, 300HP, MANUAL
HOLLEY R4489A #3972123: 350 CUBIC INCH, 370HP, MANUAL
HOLLEY R4555A #3972121: 350 CUBIC INCH, 370HP, MANUAL
DISTRIBUTOR NUMBER: 1111464: 454 CUBIC INCH, 390HP
1111490: 350 CUBIC INCH, 300HP
1111491: 350 CUBIC INCH, 370HP, TRANSISTOR IGNITION
1111493: 350 CUBIC INCH, 350HP
1112020: 350 CUBIC INCH, 300HP
1112021: 350 CUBIC INCH, 350HP
ALTERNATOR NUMBER: 1100825: 350 CUBIC INCH, 370HP
1100833: 350 CUBIC INCH 350HP, 454 CUBIC INCH 390HP
1100859: 350 CUBIC INCH, 300HP
AXLE IDENTIFICATION NUMBER CAK: 3.36:1 RATIO
CAL: 3.08:1 RATIO
CAN: 3.55:1 RATIO
CAP: 4.11:1 RATIO
CAS: 3.70:1 RATIO
CAV: 3.08:1 RATIO
CAW: 3.08:1 RATIO
CLR: 3.36:1 RATIO
POSITRACTION AXLE:
CAM: 3.36:1 RATIO
CAO: 3.70:1 RATIO
CAT: 3.08:1 RATIO, HEAVY DUTY
CAU: 3.36:1, HEAVY DUTY
CAX: 3.36:1, HEAVY DUTY
CAY: 2.73:1 RATIO, TURBO HYDRA-MATIC TRANSMISSION
CAZ: 3.55:1 RATIO, HEAVY DUTY
CFA: 3.70:1 RATIO
CFB: 4.11:1 RATIO, HEAVY DUTY
CFC: 4.56:1, HEAVY DUTY
PRODUCTION ENDING VEHICLE: JANUARY 1979:402261, FEBRUARY 1970: 405183, MARCH. 1970: 407977, APRIL. 1970: 408314, MAY 1970: 410652, JUNE 1970: 413829, JULY 1970: 417316

1970 Corvette Powertrain Specifications

Order Code Standard L46 LT1
Manufacturing Location Flint, Michigan Flint, Michigan Flint, Michigan
Type 90 degree V, Valve-In-Head 90 degree V, Valve-In-Head 90 degree V, Valve-In-Head
Cylinders 8 8 8
Displacement (cid) 350 350 350
Fuel Induction System 4-Barrel Carburetor 4-Barrel Carburetor 4-Barrel Carburetor
Horsepower 300 @ 4,800 350 @ 5,600 370 @ 6,000
Torque 380 @ 3,200 380 @ 3,600 380 @ 4,000
Bore x Stroke (in.) 4.00 x 3.48 4.00 x 3.48 4.00 x 3.48
Compression Ratio 10.0:1 11.0:1 11.0:1
Firing Order 1-8-4-3-6-5-7-2 1-8-4-3-6-5-7-2 1-8-4-3-6-5-7-2
Cylinder Number System (Left) 1-3-5-7 1-3-5-7 1-3-5-7
Cylinder Number System (Right) 2-4-6-8 2-4-6-8 2-4-6-8
Recommended Fuel Premium Premium Premium
Order Code LS5 LS7
Manufacturing Location Flint, Michigan Flint, Michigan
Type 90 degree V, Valve-In-Head 90 degree V, Valve-In-Head
Cylinders 8 8
Displacement (cid) 454 454
Fuel Induction System 4-Barrel Carburetor 4-Barrel Carburetor
Horsepower 390 @ 4,800 460 @ 5,600
Torque 500 @ 3,400 490 @ 3,600
Bore x Stroke (in.) 4.251 x 4.00 4.251 x 4.00
Compression Ratio 10.25:1 11.25:1
Firing Order 1-8-4-3-6-5-7-2 1-8-4-3-6-5-7-2
Cylinder Number System (Left) 1-3-5-7 1-3-5-7
Cylinder Number System (Right) 2-4-6-8 2-4-6-8
Recommended Fuel Premium Premium

1970 Corvette Manual Transmission/Gear Ratios

Manual Transmission

Gear Ratios 
4-Speed (RPO M20)
4-Speed Close Ratio (RPO M21)
4-Speed Heavy Duty (RPO M22)
1st Gear:
2.52:1
2.20:1
2.20:1
2nd Gear:
1.88:1
1.64:1
1.64:1
3rd Gear:
1.46:1
1.27:1
1.27:1
4th Gear:
1.00:1
1.00:1
1.00:1
Reverse:
2.59:1
2.26:1
2.26:1

Clutch

Clutch Stats
Type Single Dry Disk Centrifugal
Spring Pressure (lbs) 2450 – 2750 (2900 – 3100 Heavy Duty)
Lining area (sq. in.) 123.7 (103.53 Heavy Duty)

Turbo Hydra-Matic Automatic Transmission RPO M40/ Gear Ratios

Gear Drive L2 L1 Reverse
1st Gear 2.48:1 2.48:1 2.48:1 N/A
2nd Gear 1.48:1 1.48:1 N/A N/A
3rd Gear 1.00:1 N/A N/A N/A
Reverse N/A N/A N/A 2.08

1970 Corvette Wheels, Suspension & Brakes

Suspension – Front

Type and Description: Independent, SLA type, coil springs with center mounted shock absorbers, spherical joint steering knuckle pivots.

Front Coil Springs
Make & Type Right-hand Helix Variable rate
Material Steel Alloy
Part Number 3931823, 3931825
Spring Rate (lb. per in.) 250 (284)
Rate at Wheel (lb. per in.)
Design Load at Spring 9.99 in. @ 1395 lbs. (9.99 in. @ 1540 lbs.
Front Stabilizer Bar
Type Link
Material Hot rolled steel
Diameter .750 with 350ci engine, .9375 with 454ci engine

Suspension – Back

Type and Description: Full Independent rear suspension with frame-anchored differential unit. Position of each wheel established by three links: tubular axle drive shafts, transverse strut rods, torque control arms. Vertical suspension loads taken by transverse leaf springs. Built-in camber adjustment at strut rod inner ends.
Rear Leaf Springs
Number of Leaves 9
Material Chrome carbon steel
Length, width, height 46.36 x 2.25 x 2.121
Rear Shock Absorbers:
Type Direct, double-acting, hydraulic
Piston Diameter 1.00
Rear Strut
Material Forged Steel
Diameter 0.75

Brakes

Brake Specs
Type:
– Standard Caliper Disk – 4 Wheel Hydraulic
– J50 Delco-Moraine Vacuum Assisted Powered Brakes
Drum diameter, front (in.): 11.75 x 1.25
Drum diameter, rear (in.): 11.75 x 1.25
Swept Drum Area Effective area: 461.2

Wheels & Tires

Wheels & Tires Specs
Wheel Type:
– Standard Short spoke spider, welded steel
Wheels, size:
– Standard 15″ x 8.00
Tire, size:
– Standard F70 x 15 — 4 PR. 2-Ply Tubeless Nylon
– PT6 F70 x 15 — 4 PR, 2-Ply Red Stripe Nylon
– PT7 F70 x 15 — 4 PR, 2-Ply White Stripe Nylon
Inflation (cold)
– Front 24 lbs.
– Rear 24 lbs.

Steering

Steering Specs – Manual Steering
Type Semi-reversible gear with ball-nut driven by recirculating anti-friction bearings, energy-absorbing steering column, steering damper attached to relay rod; two position steering knuckle arm attachment for street and fast ratio steering. Adjustable steering column available optionally.
Make Saginaw
Ratio (Street) 20.2:1
Ratio (Fast) 17.6:1
Wheel Diameter (in.) 16
Turns, Stop to Stop
– Street 3.4
– Fast 2.92
Turning Diameter 37 ft. (outside front), 39 ft. (outside front)

 

Steering Specs – Power Steering RPO N40
Type (Specifications are the same as Manual Steering except the following):
Description Hydraulic; pump powered cylinder assisted linkage
Gear Ratio 16:1
Overall Ratio 17.6:1
Wheel Turns (Lock to Lock) 2.92

1970 Corvette

1970 Corvette Exterior Dimensions

Hard Top Dimensions

1970 Corvette Dimensions - Hard Top

Exterior Dimensions (Hardtop) Interior Dimensions (Hardtop)
Wheelbase: 98.0 Inches Headroom: 37.1 Inches
Overall Length: 182.1 Inches Shoulder Room: 46.9 Inches
Total Body Width: 69.2 Inches Hip Room: 48.8 Inches
Overall Height: 47.9 Inches Leg Room: 43.0 Inches
Front Track Width: 58.3 Inches
Rear Track Width: 59.0 Inches
Min. Ground Clearance 4.9 Inches

Soft Top Dimensions

1970 Corvette Dimensions - Soft Top

Exterior Dimensions (Soft Top) Interior Dimensions (Soft Top)
Wheelbase: 98.0 Inches Headroom: 38.3 Inches
Overall Length: 182.5 Inches Shoulder Room: 46.9 Inches
Total Body Width: 69.0 Inches Hip Room: 48.8 Inches
Overall Height: 47.9 Inches Leg Room: 43.0 Inches
Front Track Width: 58.7 Inches
Rear Track Width: 59.4 Inches
Min. Ground Clearance 4.9 Inches

Coupe Dimensions

1970 Corvette Dimensions - Coupe

Exterior Dimensions (Coupe) Interior Dimensions (Coupe)
Wheelbase: 98.0 Inches Headroom: 37.2 Inches
Overall Length: 182.1 Inches Shoulder Room: 46.9 Inches
Total Body Width: 69.0 Inches Hip Room: 48.8 Inches
Overall Height: 47.8 Inches Leg Room: 43.0 Inches
Front Track Width: 58.7 Inches
Rear Track Width: 59.4 Inches
Min. Ground Clearance 4.9 Inches

Capacities

Capacities
Passenger Capacity 2 – Driver & Passenger
Curb Weight (lbs) 3,304
– Convertible with soft top
– Convertible; C07 with folding top
– Convertible; C07 less folding top
Coupe
3,290
Interior Passenger Volume (cu. ft)
Interior Trunk Volume (cu. ft) 20
Fuel Capacity (gallons): 4.0 for 350ci. engines (capacity of crankcase less filter – refill)
5.0 for 454ci engines (capacity of crankcase less filter – refill)
Coolant capacity without heater (qts.) 18 for RPO LT1 engine
22 for LS5 engine
Battery: 12 Volt, 62AH for 350ci. engines
12 Volt, 80AH for 454ci. engines

1970 Corvette

1970 Corvette Performance Results

4-Speed Transmission
Standard
L46 LT1 LS5 LS7
Performance weight (lbs.)
3586 3597 3577 3768 3641
Pounds/gross horsepower
11.95 10.28 9.67 9.66 7.91
Pounds/cu.in. piston displacement
10.25 10.28 10.22 8.30 8.02
Gross horsepower/cu.in. displacement
.857 1.00 1.06 8.59
1.01
Power displacement (cu.ft./mile)
262.69 262.69 277.55 312.36 340.75
Displacement factor (cu.ft./mile)
146.51 146.06 155.19 165.79 170.38
0 – 60 mph (seconds)
6.7
Top Speed (mph)
120

1970 Corvette