The 1975 Chevy Corvette, along with the automotive industry as a whole, would experience a significant transformation at the onset of the new model year. Because of serious health issues and environmental contamination associated with the use of lead fuel, it was determined that the automotive industry would – and should – phase it out.
Read More: 1975 Chevrolet Corvette Research Center
1975 Corvette Specifications
1975 Corvette Main Specs
| MODEL: | 1975 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): |
1Z37J5S400001 – 1Z37J5S438465
|
| ENGINE SUFFIX: | CHA: 350 CUBIC INCH, 165 HORSEPOWER, MANUAL CHB: 350 CUBIC INCH, 165 HORSEPOWER, AUTOMATIC CHC: 350 CUBIC INCH, 205 HORSEPOWER, MANUAL CHR: 350 CUBIC INCH, 205 HORSEPOWER, AUTOMATIC, CALIFORNIA EMISSIONS CHU: 350 CUBIC INCH, 165 HORSEPOWER, MANUAL CHZ: 350 CUBIC INCH, 165 HORSEPOWER, AUTOMATIC, CALIFORNIA EMISSIONS CKC: 350 CUBIC INCH, 205 HORSEPOWER, AUTOMATIC CRJ: 350 CUBIC INCH, 165 HORSEPOWER, MANUAL CRK: 350 CUBIC INCH, 165 HORSEPOWER, AUTOMATIC CRL: 350 CUBIC INCH, 205 HORSEPOWER, MANUAL CRM: 350 CUBIC INCH, 205 HORSEPOWER, AUTOMATIC CUA: 350 CUBIC INCH, 165 HORSEPOWER, MANUAL CUB: 350 CUBIC INCH, 165 HORSEPOWER, MANUAL CUD: 350 CUBIC INCH, 205 HORSEPOWER, MANUAL CUB: 350 CUBIC INCH, 205 HORSEPOWER, MANUAL |
| ENGINE BLOCK NUMBER: | 3970010: 350 CUBIC INCH, 180 HP, 210HP |
| HEAD NUMBER: | 333882: 350 CUBIC INCH, 180HP, 210HP |
| CARBURETOR NUMBERS: | ROCHESTER Q-jet #17056206: 350 CUBIC INCH, 180HP, AUTOMATIC TRANSMISSION ROCHESTER Q-jet #17056207: 350 CUBIC INCH, 180HP, MANUAL TRANSMISSION ROCHESTER Q-jet #17056210: 350 CUBIC INCH, 210HP, AUTOMATIC TRANSMISSION ROCHESTER Q-jet #17056211: 350 CUBIC INCH, 210HP, MANUAL TRANSMISSION ROCHESTER Q-jet #17056226: 350 CUBIC INCH, 210HP, AUTOMATIC TRANSMISSION ROCHESTER Q-jet #17056506: 350 CUBIC INCH, 180HP, AUTOMATIC TRANSMISSION ROCHESTER Q-jet #17056507: 350 CUBIC INCH, 180HP, MANUAL TRANSMISSION |
| DISTRIBUTOR NUMBER: | 1103200: 350 CUBIC INCH, 210HP, MANUAL 1112888: 350 CUBIC INCH, 180HP 1112905: 350 CUBIC INCH, 180HP, AUTOMATIC, CALIFORNIA EMISSIONS 1112979: 350 CUBIC INCH, 210HP, AUTOMATIC |
| ALTERNATOR NUMBER: | 1102474: 350 CUBIC INCH, AIR CONDITIONING 1102484: 350 CUBIC INCH, WITHOUT AIR CONDITIONING |
| AXLE IDENTIFICATION NUMBER | AA: 3.55:1 RATIO AB: 3.70:1 RATIO AC: 4.11:1 RATIO AY: 2.73:1 RATIO AW: 3.08:1 RATIO AX: 3.36:1 RATIO LR: 3.36:1 RATIO |
| PRODUCTION ENDING VEHICLE: | OCT., 1974: 402385, FEB., 1975: 417112, JUN., 1975: 433474, NOV.. 1974: 406180, MAR., 1975: 420856, JUL, 1975: 438465, DEC., 1974: 409190, APR., 1975: 425228, JAN., 1975: 413159, MAY, 1975: 429379 |
1975 Corvette Powertrain Specifications
| Order Code | Standard | L82 |
| 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 | 165 @ 4,400 | 205 @ 4,800 |
| Torque | 255 @ 2,400 | 255 @ 3,600 |
| Bore x Stroke (in.) | 4.00 x 3.48 | 4.00 x 3.48 |
| Compression Ratio | 8.5:1 | 9.0:1 |
| Valve Lifters | Hydraulic | Hydraulic |
| 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 |
1975 Corvette Manual Transmission/Gear Ratios
Manual Transmission
| Gear Ratios |
4-Speed (RPO M20)
|
4-Speed Close Ratio (RPO M21)
|
|
1st Gear:
|
2.64:1
|
2.43:1
|
|
2nd Gear:
|
1.75:1
|
1.61:1
|
|
3rd Gear:
|
1.33:1
|
1.23:1
|
|
4th Gear:
|
1.00:1
|
1.00:1
|
|
Reverse:
|
2.55:1
|
2.35:1
|
Clutch
| Clutch | Stats |
| Type | Single Dry Disk Centrifugal (Dual Dry Disk for LT1) |
| Spring Pressure (lbs) | 2450 – 2750 |
| Lining area (sq. in.) | 123.7 |
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 |
1975 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 | Coil |
| Material | Steel Alloy |
| Size | 10.27 x 3.80; 130.84 x 0.606 |
| Front Stabilizer Bar | |
| Type | Link |
| Material | Hot rolled steel |
| Diameter | .8125 with 350ci engine, .875 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 | Variable rate 9-leaf |
| Material | Chrome carbon steel |
| Length, width, height | 48.60 x 2.25 x 2.121 |
| Rear Strut | |
| Material | Forged Steel |
| Diameter | 0.75 |
Brakes
| Brake Specs | |
| Type: | – |
| – Standard | Caliper Disk – 4 Wheel Hydraulic |
| – J50 | Delco Moraine, vacuum power unit; integral |
| Drum diameter, front (in.): | 11.75 x 1.25 |
| Drum diameter, rear (in.): | 11.75 x 1.25 |
| Swept Drum Area Effective area: | 249.14 |
Wheels & Tires
| Wheels & Tires Specs | |
| Wheel Type: | |
| – Standard | Short spoke spider, welded steel |
| Wheels, size: | |
| – Standard | 15″ x 8.00 |
| Tire, size: | |
| – Standard | GR70 x 15B — Blackwall Steel Belted Radial |
| – QRM | GR70 x 15B — White Stripe Steel Belted Radial |
| – QRZ | GR70 x 15B — White Letter Steel Belted Radial |
| Inflation | |
| – Front | 20 psi (cold), 30 psi (hot) |
| – Rear | 20 psi (cold), 30 psi (hot) |
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 |
| Ratio (Power) | 17.6:1 |
| Wheel Diameter (in.) | 15 |
| Turns, Stop to Stop | |
| – Street | 3.4 |
| – Fast | 2.92 |
| – Power | 2.92 |
| Turning Diameter | 37 ft. (outside front), 38.8 ft. (outside front) |
1975 Corvette Exterior Dimensions
Hard Top Dimensions
| Exterior Dimensions (Hardtop) | Interior Dimensions (Hardtop) | ||
| Wheelbase: | 98.0 Inches | Headroom: | 36.0 Inches |
| Overall Length: | 185.5 Inches | Shoulder Room: | 47.9 Inches |
| Total Body Width: | 69.0 Inches | Hip Room: | 48.8 Inches |
| Overall Height: | 48.1 Inches | Leg Room: | 42.1 Inches |
| Front Track Width: | 58.7 Inches | ||
| Rear Track Width: | 59.5 Inches | ||
| Min. Ground Clearance | 4.3 Inches | ||
Soft Top Dimensions
| Exterior Dimensions (Soft Top) | Interior Dimensions (Soft Top) | ||
| Wheelbase: | 98.0 Inches | Headroom: | 37.1 Inches |
| Overall Length: | 185.2 Inches | Shoulder Room: | 47.9 Inches |
| Total Body Width: | 69.0 Inches | Hip Room: | 48.8 Inches |
| Overall Height: | 48.2 Inches | Leg Room: | 42.1 Inches |
| Front Track Width: | 58.7 Inches | ||
| Rear Track Width: | 59.4 Inches | ||
| Min. Ground Clearance | 4.5 Inches | ||
Coupe Dimensions
| Exterior Dimensions (Coupe) | Interior Dimensions (Coupe) | ||
| Wheelbase: | 98.0 Inches | Headroom: | 36.2 Inches |
| Overall Length: | 185.2 Inches | Shoulder Room: | 47.9 Inches |
| Total Body Width: | 69.0 Inches | Hip Room: | 48.8 Inches |
| Overall Height: | 48.1 Inches | Leg Room: | 42.1 Inches |
| Front Track Width: | 58.7 Inches | ||
| Rear Track Width: | 59.5 Inches | ||
| Min. Ground Clearance | 4.3 Inches | ||
Capacities
| Capacities | |
| Passenger Capacity | 2 – Driver & Passenger |
| Curb Weight (lbs) | 3,542 |
| Interior Passenger Volume (cu. ft) | 6.5 |
| Interior Trunk Volume (cu. ft) | 18 |
| Fuel Capacity (gallons): | 4.0 for 350ci. engines (capacity of crankcase less filter – refill) |
| Coolant capacity without heater (qts.) | 19 for Base engine 18 for L82 engine |
| Battery: | 12 Volt, 78 Plates, 3,250 Watts for 350ci. engines 12 Volt, 90 Plates, 4,000 Watts for Heavy Duty |
1975 Corvette Performance Results
|
4-Speed Transmission
|
Base | L82 |
|
Performance weight (lbs.)
|
3733
|
3746
|
|
Pounds/net horsepower
|
22.62 |
18.27
|
|
Pounds/cu.in. piston displacement
|
10.66
|
10.70
|
|
Net horsepower/cu.in. displacement
|
.471
|
.586
|
|
Power displacement (cu.ft./mile)
|
258.61
|
273.23
|
|
Displacement factor (cu.ft./mile)
|
138.29
|
138.69
|
|
0 – 60 mph (seconds)
|
—
|
—
|
|
Top Speed (mph)
|
—
|
— |
|
Quarter Mile (secs @ mph)
|
—
|
— |
| Turbo Hydra-Matic Automatic | Base | L82 |
|
Performance weight (lbs.)
|
3787 | 3800 |
| Pounds/net horsepower | 22.95 |
18.54
|
|
Pounds/cu.in. piston displacement
|
10.82
|
10.86
|
|
Net horsepower/cu.in. displacement
|
.471
|
.586
|
|
Power displacement (cu.ft./mile)
|
237.06
|
258.61
|
|
Displacement factor (cu.ft./mile)
|
125.43 |
136.11
|
|
0 – 60 mph (seconds)
|
7.7
|
— |
|
Top Speed (mph)
|
—
|
— |
|
Quarter Mile (secs @ mph)
|
16.12 @ 87.4
|
—
|
