Corvette: Year By Year

    

About The Corvette

    

Corvette Specs

    
  

1974 Specs

More About the 1974 Corvette
1974 Chevrolet Corvette C3

1974 Chevrolet Corvette C3

Close1974 Chevrolet Corvette C3

Body Specs

Wheelbase: 98.0 inches
Overhang (Front): 42.8 inches
Overhang (Rear): 44.7 inches
Front Track: 58.7 inches
Rear Track: 59.5 inches
Length: 185.5 inches
Ground Clearance
Rear Axle Differential to Ground:
6.2 inches
Minimum Running Clearance: 4.2 inches
(Exhaust Pipe at X-Member)
Overall Height: 47.7 inches (Coupe)
47.8 inches (Convertible)
Rocker Panel to Ground (Front): 7.5 inches
Rocker Panel to Ground (Rear): 7.5 inches
Luggage Capacity: 6.1 Cubic Feet (Coupe)
5.0 Cubic Feet (Convertible)
Cowl Height: 36.3 inches
Windshield Slope Angle: 57°
Head Room: 36.2 inches (Coupe)
37.1 inches (Convertible, Soft Top)
36.0 inches (Convertible, Hard Top)
Shoulder Room: 47.9 inches
Hip Room: 48.8 inches
Tire Size: GR70-15B
Recommended Tire Inflation 20 PSI Cold (Front, Rear)
Wheels, Regular Production: Size: 15 x 8
Synchronization All Forward Gears
Turbo Hydra-Matic (Automatic) Transmission: 1st Gear 2.48:1
2nd Gear 1.48:1
3rd Gear 1.00:1
Reverse Gear 2.08:1
Lubricant Capacity: 3 Quarts
Four Speed M20 Transmission: 1st Gear 2.52:1
2nd Gear 1.88:1
3rd Gear 1.46:1
4th Gear 1.00:1
Reverse Gear 2.59:1
Close Ratio Four Speed
M21 Transmission :
1st Gear 2.20:1
2nd Gear 1.64:1
3rd Gear 1.27:1
4th Gear 1.00:1
Reverse Gear 2.26:1
Transmission Lubricant Type: Military MIL-L-2105-B
SAE 80
Lubricant Capacity: Four Speed Manual: 2.5 Quarts
Differential Lubricant Type: Military MIL-L-2105-B
SAE 80
Differential Lubricant Capacity: 3.7 pints
Axle Ratio: 195 Horsepower Base Engine
3.08:1, 3.36:1
250 Horsepower L82 Engine
3.55:1, 3.70:1
270 Horsepower 454 Cubic Inch LS4 Engine
3.08:1, 3.36:1 (3.55:1 with M21 Transmission)
Transmission Synchromesh: All Four Gears
Standard Fuel Tank Capacity: 18 Gallons
Steering Wheel Diameter
(Power, Manual Steering):
15.0 inches
Steering Ratio: 16.1:1
Wheel Turns: 3.4 (Street)
2.92 (Fast)
Turning Diameters: 37.0 feet (Curb to Curb)
38.6 feet (Wall to Wall)


Weight

Model 19467 Convertible:
(Curb)    Front: 1,664 lb.
Rear: 1,732 lb.
Total: 3,396 lb.

(Shipping)    Total: 3,315 lb.
Model 19437 Sport Coupe:
(Curb)    Front: 1,671 lb.
Rear: 1,719 lb.
Total: 3,390 lb.

(Shipping)    Total: 3,309 lb.
Shipping Weight: Weight of basic vehicle with regular equipment, including grease, oil, engine coolant to capacity and (4) gallons of gasoline and engine coolant to capacity.

Weight Differentials
Auxiliary Top (RPO C07): +69 lb.
(+59 lb. Front; +10 lb. Rear)
Air Conditioning (RPO C60): +81 lb. (With Standard, L82 Engines)
(+65 lb. Front; +16 lb. Rear)
+87 lb. (With LS4 Engine)
(+70 lb. Front; +17 lb. Rear)
Power Windows (RPO A31): +7 lb.
(+4 lb. Front; +3 lb. Rear)
Power Brakes (RPO J50): +10 lb.
(+9 lb. Front; +1 lb. Rear)
L82 Engine
250 Horsepower:
+14 lb.
(+11 lb. Front; +3 lb. Rear)
LS4 Engine
270 Horsepower:
+200 lb.
(+178 lb. Front; +22 lb. Rear)
Standard, L82 350 cubic inch Engines
With Turbo Hydra Matic Transmission:
+54 lb.
(+37 lb. Front; +17 lb. Rear)
LS4 Engine
270 Horsepower
With Turbo Hydra Matic Transmission:
+45 lb.
(+31 lb. Front; +14 lb. Rear)
Power Steering: +26 lb.
(+25 lb. Front; +1 lb. Rear)
With Standard, L82 Engines
+28 lb.
(+27 lb. Front; +1 lb. Rear)
With LS4 Engine
Radio, AM/FM Stereophonic
(RPO U58):
+18 lb.
(+11 lb. Front; +7 lb. Rear)
Radio, AM/FM Pushbutton
(RPO U69):
+14 lb.
(+7 lb. Front; +7 lb. Rear)


Engine Specs

Type: V8
Valve Location: In Head
Bore / Stroke: 4.00" / 3.48" (Standard, L82 350 Cubic Inch)
4.251" / 4.00" (LS4 454 Cubic Inch)
Displacement: Standard, L82 Engines: 350 Cubic Inches
LS4 Engine: 454 Cubic Inches
Compression Ratio: 8.5:1 (Standard Engine)
9.0:1 (L82 Engine)
8.25:1 (LS4 Engine)
Crankshaft Material: Forged Steel
Camshaft Material: Cast Alloy Iron
Oil Pump Type: Gear
Normal Oil Pressure: 32 - 40 psi @ 2,000 RPM
42 - 46 psi @ 2,000 RPM
Oil Pressure Gauge: Mechanical
Recommended Oil Grade: Above 20°F: SAE 20W-20, SAE 10W-30, 10W-40
20W-40, 20W-50
0°F to 60°F: SAE 10W, 5W-30, 10W-30, 10W-40
Below 20°F: SAE 5W-20, 5W-30
Fuel Filter: Strainer
Fuel Pump: Mechanical
Fuel Pressure: 5¼ - 6½ PSI
Cooling System Capacity: 350 cubic inch Standard Engine
19 Quarts (with heater)
350 cubic inch L82 Engine
18 Quarts (with heater)
454 cubic inch LS4 Engine
24 Quarts (with heater)
Thermostat Type: Choke
Radiator Cap Relief Pressure: 15 +/- 1 PSI
Battery: (Standard, L82 Engines) 12 volt - 78 plate
3,250 Watts @ 0° F
(LS4 Engine) 12 volt - 90 plate
4,000 Watts @ 0° F
Thermostat Opening: 192° - 198° F (Base, LS4 Engines)
177° - 183° F (L82 Engine)

Brakes
Type: Caliper Disc, Four Wheel Hydraulic
Effective Area: 78.1 Square Inches
Swept Area: 639.4 Square Inches
Disc: Vented

Horsepower
Standard Engine (350 cubic inch): 195 hp @ 4,400 RPM;
Torque: 275 lb-ft @ 2,800 RPM
RPO L82 (350 cubic inch): 250 hp @ 5,200 RPM;
Torque: 285 lb-ft. @ 4,000 RPM
RPO LS4 (454 cubic inch): 270 hp @ 4,400 RPM;
Torque: 380 lb-ft @ 2,800 RPM

Ignition System
Coil: Delco-Remy Base, L82 Engine: 1115270;
LS4: 1115287
Coil current rating: 4 amps (engine stopped)
1.8 amps (engine running)
Breaker Gap: .019"
Ignition Timing Centrifugal Advance: Distributor | 1112247 | Base Engine
Start: 0° @ 800 - 1,200 RPM
Intermediate: 9 - 13° @ 2,400 RPM
Maximum: 16 - 20° @ 4,200 RPM
Distributor | 1112544* | Base Engine
Start: 0° @ 850 - 1,200 RPM
Intermediate: 13 - 15° @ 2,400 RPM
Maximum: 20 - 24° @ 4,200 RPM
Distributor | 1112150 | L82 Engine
Start: 0° @ 1,000 - 1,400 RPM
Intermediate: 10 - 14° @ 2,200 RPM
Maximum: 18 - 22° @ 5,000 RPM
Distributor | 1112114 | LS4 Engine
Start: 0° @ 850 - 1,300 RPM
Intermediate: 9 - 13° @ 2,400 RPM
Maximum: 16 - 20° @ 4,200 RPM
Ignition Timing Vacuum Advance: Distributor | 1112247 | Base Engine
Start: 0° @ 5 - 7 inches Hg
Maximum: 13.5 - 20° @ 13.5 inches Hg
Distributor | 1112150 | L82 Engine
Start: 0° @ 5 - 7 inches Hg
Maximum: 13.5 - 20° @ 12 inches Hg
Distributor | 1112114 | LS4 Engine
Start: 0° @ 5 - 7 inches Hg
Maximum: 18.5 - 21.5° @ 15 inches Hg
Distributor | 1112544* | Base Engine
Start: 0° @ 5 - 7 inches Hg
Maximum: 13.5 - 16.5° @ 13.5 inches Hg
Timing: Base Engine: 8° BTC @ 900 RPM (Manual)
Base Engine*: 4° BTC @ 900 RPM (Manual)
8° BTC @ 600 RPM (Automatic)
L82 Engine: 8° BTC @ 900 RPM (Manual)
8° BTC @ 700 RPM (Automatic)
LS4 Engine: 10° BTC @ 800 RPM (Manual)
10° BTC @ 600 RPM (Automatic)
*Pertains to Engines Used in California
Spark Plug: ACR44T (350, 454 Cubic Inch Engines)
Spark Plug Thread: 14 mm.
Spark Plug Torque: 15 lb.-ft.
Spark Plug Gap: .033 - .038 inch
Firing Order: 1-8-4-3-6-5-7-2

1974 Corvette Options

RPO: Description Production:    Price
* Custom Interior Trim 19,959 (53.22%) $154.00
Optional Rear Axle Ratios 1,219 (3.25%) $12.00
A31 Power Windows 23,940 (63.84%) $86.00
A85 Custom Shoulder Belts (standard with coupe) 618 (1.65%) $41.00
C07 Auxiliary Hardtop (for convertible) 2,612 (6.96%) $267.00
C08 Vinyl Covering (for auxiliary hardtop) 367 (0.98%) $329.00
C50 Rear Window Defroster 9,322 (24.86%) $43.00
C60 Air Conditioning 29,497 (78.65%) $467.00
FE7 Gymkhana Suspension 1,905 (5.08%) $7.00
J50 Power Brakes 33,306 (88.81%) $49.00
L82 350 cu. in. 250hp Engine 6,690 (17.84%) $299.00
LS4 454 cu. in. 270hp Engine 3,494 (9.32%) $250.00
M21 4-Speed Manual Transmission, close ratio 3,494 (9.32%) n/a
M40 Turbo Hydra-Matic Automatic Transmission 25,146 (67.05%) n/a
N37 Tilt-Telescopic Steering Column 27,700 (73.86%) $82.00
N41 Power Steering 35,944 (95.85%) $117.00
QRM White Stripe Steel Belted Tires, GR70x15 9,140 (24.37%) $32.00
QRZ White Letter Steel Belted Tires, GR70x15 24,102 (64.27%) $45.00
U05 Dual Horns 5,258 (14.02%) $4.00
U58 AM-FM Radio, stereo 19,581 (52.21%) $276.00
U69 AM-FM Radio 17,374 (46.33%) $173.00
UA1 Heavy Duty Battery (standard with LS4) 9,169 (24.45%) $15.00
UF1 Map Light (on rearview mirror) 16,101 (42.93%) $5.00
YF5 California Emission Test n/a $20.00
Z07 Off Road Suspension and Brake Package 47 (0.13%) $400.00

Total Production: 37,502
Coupe: 32,028 (85.40%)
Convertible: 5,474 (14.60%)

Notes: Base Corvette Coupe with 350 cu. in. 195 hp engine and wide ratio four speed manual transmission: $6,001.50.
Base Corvette Convertible with 350 cu. in. 195 hp engine and wide ratio four speed manual transmission: $5,765.00.

Colors

Code Exterior Quantity Interior Soft Top Wheels
10 Classic White n/a Black / Dark Blue / Dark Red / Neutral / Saddle / Silver Black / White Silver
14 Silver Mist n/a Black / Dark Blue / Dark Red / Neutral / Silver Black / White Silver
17 Corvette Gray n/a Black / Dark Blue / Dark Red / Neutral / Saddle / Silver Black / White Silver
22 Corvette Medium Blue n/a Black / Dark Blue / Silver Black / White Silver
48 Dark Green n/a Black / Neutral / Saddle / Silver Black / White Silver
56 Bright Yellow n/a Black / Neutral / Saddle / Silver Black / White Silver
68 Dark Brown n/a Black / Neutral / Saddle / Silver Black / White Silver
74 Medium Red n/a Black / Dark Red / Neutral / Saddle / Silver Black / White Silver
76 Mille Miglia Red n/a Black / Dark Red / Neutral / Saddle / Silver Black / White Silver
80 Corvette Orange n/a Black / Neutral / Saddle / Silver Black / White Silver

1974 Corvette