1970 Corvette

1971 Corvette Performance & Specifications

Powertrain, Steering, Brakes, Dimensions, & Suspension

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It was decided by Chevrolet management that they should treat the 1971 model year as an extension of the 1970 line, which meant that the Corvette – for better or worse – would remain essentially unaltered between the two model years.

Read More: 1971 Chevrolet Corvette Research Center

1971 Corvette Specifications

1971 Corvette Main Specs

MODEL:
1971 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): 194371S100001 – 194371S121801
ENGINE SUFFIX:
CGT: 350 CUBIC INCH, 270 HP, AUTOMATIC TRANS
CGY: 350 CUBIC INCH, 330 HP, MANUAL TRANS
CGZ: 350 CUBIC INCH, 330 HP, MANUAL TRANS
CJK: 350 CUBIC INCH, 270 HP, AUTOMATIC TRANS
CJL: 350 CUBIC INCH, 270 HP, MANUAL TRANS
CPH: 454 CUBIC INCH, 365 HP, MANUAL TRANS
CPJ: 454 CUBIC INCH, 365 HP, AUTOMATIC TRANS
CPW: 454 CUBIC INCH, 425 HP, MANUAL TRANS, ALUMINUM HEADS
CPX: 350 CUBIC INCH, 425 HP, AUTOMATIC TRANS, ALUMINUM HEADS
ENGINE BLOCK NUMBER:
3970010, 350 CUBIC INCH, 270 HP, 330HP
3963512, 454 CUBIC INCH, 365 HP, 425HP
HEAD NUMBER:
3946074, 454 CUBIC INCH, 425HP
3973487, 350 CUBIC INCH, 270HP, 330HP
3993820, 454 CUBIC INCH, 365HP
3994026, 454 CUBIC INCH, 425HP
CARBURETOR NUMBER:
OCHESTER Q-jet #7041204: 454 CUBIC INCH, 365HP, AUTOTRANS
ROCHESTER Q-jet #7041205: 454 CUBIC INCH, 365HP, MANUAL TRANS
ROCHESTER Q-jet #7041212: 350 CUBIC INCH, 270HP, AUTO TRANS
ROCHESTER Q-jet #7041213: 350 CUBIC INCH, 270HP, MANUAL TRANS
HOLLEY R4489A #3989021: 350 CUBIC INCH, 330HP, MANUAL TRANS
HOLLEY R4555A #3986195: 454 CUBIC INCH, 425HP, MANUAL TRANS
DISTRIBUTOR NUMBER:
1112038: 350 CUBIC INCH, 330HP, TRANSISITOR IGNITION
1112050: 350 CUBIC INCH, 270HP
1112051: 454 CUBIC INCH, 365HP,
1112053: 454 CUBIC INCH, 425HP, TRANSISTOR IGNITION
1112076: 454 CUBIC INCH, 425HP, TRANSISTOR IGNITION
ALTERNATOR:
1100543: 454 CUBIC INCH, 365HP, 425HP
1100950: 350 CUBIC INCH 270HP, 330HP
1100544: ALL WITH AIR CONDITIONING
AXLE IDENTIFICATION:
AA: 3.55:1 RATIO
AB: 3.70:1 RATIO
AC: 4.11:1 RATIO
AD: 4.56:1 RATIO
AW: 3.08:1 RATIO
AX: 3.36:1 RATIO
LR: 3.36:1 RATIO
PRODUCTION CUTOFF NUMBERS (ENDING VEHICLE):
AUG., 1970: 101212, JAN. 1971: 108230, MAY, 1971: 118223, SEP.. 1970: 102226, FEB. 1971: 110886, JUN., 1971: 120686, NOV., 1970: 102675, MAR. 1971: 113626, JULY, 1971: 121801, DEC., 1970: 105269, APR. 1971: 115983

1971 Corvette Powertrain Specifications

Order Code Standard LT1
Manufacturing Location Flint, Michigan Flint, Michigan
Type 90 degree V, Valve-In-Head 90 degree V, Valve-In-Head
Cylinders 8 8
Displacement (cid) 350 350
Fuel Induction System 4-Barrel Carburetor 4-Barrel Carburetor
Horsepower 270 @ 4,800 330 @ 5,600
Torque 360 @ 3,200 360 @ 4,000
Bore x Stroke (in.) 4.00 x 3.48 4.00 x 3.48
Compression Ratio 8.5:1 9.0:1
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
Order Code LS5 LS6
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 365 @ 4,800 425 @ 5,600
Torque 500 @ 3,400 475 @ 4,000
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

1971 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

1971 Corvette

1971 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

1971 Corvette Exterior Dimensions

Hard Top Dimensions

2013 Corvette Dimensions (Hardtop)

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

2013 Corvette Dimensions (Softop)

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

2013 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

1971 Corvette

1971 Corvette Performance Results

4-Speed Transmission
Standard
LT1
LS5
LS6
Performance weight (lbs.)
3592
3654
3812
 N/A
Pounds/gross horsepower
13.30
11.07
 10.44
N/A
Pounds/cu.in. piston displacement
10.26
10.44  8.44
N/A
Gross horsepower/cu.in. displacement
.771
.943
.804
N/A
Power displacement (cu.ft./mile)
261.33
276.11
310.73
N/A
Displacement factor (cu.ft./mile)
145.18
150.88
162.68
N/A
0 – 60 mph (seconds)
_
6.0 (1)
_
N/A
Top Speed (mph)
_
137 (1)
_
N/A

 

4-Speed Transmission
Performance weight (lbs.)
N/A
3654
3812
3674
Pounds/gross horsepower
N/A
11.07 10.44 8.64
Pounds/cu.in. piston displacement
N/A
10.44 8.40
8.09
Gross horsepower/cu.in. displacement
N/A
.943
.804
.956
Power displacement (cu.ft./mile)
N/A
287.78
338.99
338.99
Displacement factor (cu.ft./mile)
N/A
287.78
177.48
167.06
0 – 60 mph (seconds)
N/A
_
5.3 (1)
Top Speed (mph)
N/A
_
152 (1)

 

4-Speed Transmission
Performance weight (lbs.)
 3680
N/A
3860
3724
Pounds/gross horsepower
 13.63
N/A
10.57
8.76
Pounds/cu.in. piston displacement
 10.51
N/A
8.50 8.20
Gross horsepower/cu.in. displacement
 .771
N/A
.804
.956
Power displacement (cu.ft./mile)
239.55
N/A
 310.73
310.73
Displacement factor (cu.ft./mile)
130.19
N/A
161.00
184.23
0 – 60 mph (seconds)
7.1 (1)
N/A
5.7 (1)
_
Top Speed (mph)
132 (1)
N/A
141 (1)
_

1971 Corvette