1974 Corvette

1974 Corvette Performance & Specifications

Powertrain, Steering, Brakes, Dimensions, & Suspension

The arrival of the 1974 Chevy Corvette occurred during an abysmal period in automotive history.  The period in question actually began in October 1973 when OAPEC, (the Arab members of OPEC (the Organization of Petroleum Exporting Countries) plus Egypt, Syria, and Tunisia) proclaimed an oil embargo against the United States after the United States came to the aid of the Israelis during a military altercation between Egypt, Syria, and Israel.

Read More: 1974 Chevrolet Corvette Research Center

1974 Corvette Specifications

1974 Corvette Main Specs

MODEL: 1974 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):
1Z37J4S400001 – 1Z37J4S434464
ENGINE SUFFIX: CKZ: 350 CUBIC INCH, 195 HORSEPOWER, MANUAL
CLA: 350 CUBIC INCH, 195 HORSEPOWER, AUTOMATIC
CLB: 350 CUBIC INCH, 195 HORSEPOWER, MANUAL, CALIFORNIA EMISSIONS
CLC: 350 CUBIC INCH, 195 HORSEPOWER, AUTOMATIC, CALIFORNIA EMISSIONS
CLD: 350 CUBIC INCH, 250 HORSEPOWER, AUTOMATIC
CLH: 350 CUBIC INCH, 250 HORSEPOWER, AUTOMATIC, CALIFORNIA EMISSIONS
CLR: 350 CUBIC INCH, 250 HORSEPOWER, MANUAL
CLS: 350 CUBIC INCH, 250 HORSEPOWER, MANUAL, CALIFORNIA EMISSIONS
CWM: 454 CUBIC INCH, 270 HORSEPOWER, MANUAL
CWR: 454 CUBIC INCH, 270 HORSEPOWER, AUTOMATIC
CWS: 454 CUBIC INCH, 270 HORSEPOWER, AUTOMATIC, CALIFORNIA EMISSIONS
CWT: 454 CUBIC INCH, 270 HORSEPOWER, MANUAL, CALIFORNIA EMISSIONS
ENGINE BLOCK NUMBER: 3970010: 350 CUBIC INCH, 195 HP, 250HP
3999289: 454 CUBIC INCH, 270HP
HEAD NUMBER: 333881: 350 CUBIC INCH, 195HP
333882: 350 CUBIC INCH, 195HP, 250HP
336781: 454 CUBIC INCH, 270HP
CARBURETOR NUMBERS: ROCHESTER Q-jet #7044221: 454 CUBIC INCH, 270HP, MANUAL TRANSMISSION
ROCHESTER Q-jet #7044206: 350 CUBIC INCH, 195HP, AUTOMATIC TRANSMISSION
ROCHESTER Q-jet #7044207: 350 CUBIC INCH, 195HP, MANUAL TRANSMISSION
ROCHESTER Q-jet #7044210: 350 CUBIC INCH, 250HP, MANUAL TRANSMISSION
ROCHESTER Q-jet #7044211: 350 CUBIC INCH, 250HP, MANUAL TRANSMISSION
ROCHESTER Q-jet #7044225: 454 CUBIC INCH, 270HP, AUTOMATIC TRANSMISSION
ROCHESTER Q-jet #7044505: 454 CUBIC INCH, 270HP, AUTOMATIC TRANSMISSION, CALIFORNIA EMISSIONS
ROCHESTER Q-jet #7044506: 350 CUBIC INCH, 250HP, AUTOMATIC TRANSMISSION, CALIFORNIA EMISSIONS
DISTRIBUTOR NUMBER: 1112114: 454 CUBIC INCH, 270HP
1112526: 454 CUBIC INCH, 270HP
1112150: 350 CUBIC INCH, 250HP
1112247: 350 CUBIC INCH, 195HP
1112544: 350 CUBIC INCH, 195HP MANUAL, CALIFORNIA EMISSIONS
1112850: 350 CUBIC INCH, 195HP MANUAL, CALIFORNIA EMISSIONS
1112851: 350 CUBIC INCH, 195HP AUTOMATIC, CALIFORNIA
ALTERNATOR NUMBER: 1100544: 350, 454 CUBIC INCH, AIR CONDITIONING
1100950: 350, 454 CUBIC INCH
1102353: 454 CUBIC INCH
AXLE IDENTIFICATION NUMBER AA: 3.55:1 RATIO
AB: 3.70:1 RATIO
AC: 4.11:1 RATIO
AW: 3.08:1 RATIO
AX: 3.36:1 RATIO
LR: 3.36:1 RATIO
PRODUCTION ENDING VEHICLE: AUG., 1973: 401250, DEC., 1973: 412830, APR., 1974: 425751, AUG., 1974: 433257, SEP.. 1973: 404111, JAN., 1974: 416184, MAY, 1974: 429602, SEP., 1974: 437251, OCT., 1973: 407605, FEB., 1974: 419258, JUNE., 1974: 433257, OCT., 1974: 437502, NOV., 1973: 410813, MAR., 1974: 422367, JULY, 1974: 433257

1974 Corvette Powertrain Specifications

Order Code Standard L82 LS4
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) 350 350 454
Fuel Induction System 4-Barrel Carburetor 4-Barrel Carburetor 4-Barrel Carburetor
Horsepower 195 @ 4,400 250 @ 5,200 270 @ 4,400
Torque 275 @ 2,800 285 @ 4,000 380 @ 2,800
Bore x Stroke (in.) 4.00 x 3.48 4.00 x 3.48 4.251 x 4.00
Compression Ratio 8.5:1 9.0:1 8.25:1
Valve Lifters Hydraulic Mechanical Hydraulic
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

1974 Corvette Manual Transmission/Gear Ratios

Manual Transmission

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

Clutch

Clutch Stats
Type Single Dry Disk Centrifugal (Dual Dry Disk for LT1)
Spring Pressure (lbs) 2450 – 2750 (2900 – 3100 for LT1)
Lining area (sq. in.) 123.7 (207.06 for LT1)

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

1974 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: 639.4

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 15 — Blackwall Steel Belted Radial
– QRM GR70 x 15 — White Stripe Steel Belted Radial
– QRZ GR70 x 15 — White Letter Steel Belted Radial
Inflation (cold)
– 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
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

1974 Corvette

1974 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: 69.2 Inches Hip Room: 48.8 Inches
Overall Height: 47.8 Inches Leg Room: 42.1 Inches
Front Track Width: 58.7 Inches
Rear Track Width: 59.5 Inches
Min. Ground Clearance 4.2 Inches

Soft Top Dimensions

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 4.5 Inches

Coupe Dimensions

Exterior Dimensions (Coupe) Interior Dimensions (Coupe)
Wheelbase: 98.0 Inches Headroom: 37.2 Inches
Overall Length: 185.5 Inches Shoulder Room: 46.9 Inches
Total Body Width: 69.0 Inches Hip Room: 48.8 Inches
Overall Height: 47.7 Inches Leg Room: 43.0 Inches
Front Track Width: 58.7 Inches
Rear Track Width: 59.5 Inches
Min. Ground Clearance 4.2 Inches

Capacities

Capacities
Passenger Capacity 2 – Driver & Passenger
Curb Weight (lbs) 3,396
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 454ci. engine
Battery: 12 Volt, 62AH for 350ci. engines
12 Volt, 80AH for 454ci. engines

1974 Corvette

1974 Corvette Performance Results

4-Speed Transmission
Standard
LT1 LS5
Performance weight (lbs.)
3605 3630 3827
Pounds/gross horsepower
18.02 14.23 14.17
Pounds/cu.in. piston displacement
10.30 10.37 8.43
Gross horsepower/cu.in. displacement
.571 .728 .771
Power displacement (cu.ft./mile)
255.55 270.00 303.86
Displacement factor (cu.ft./mile)
141.97 148.35 159.09
0 – 60 mph (seconds)
8.5
Top Speed (mph)
Quarter Mile (secs @ mph)
15.2 @ 83 14.7 @ 93