More About the 1974 Corvette
1974 Corvette
Body Specs |
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| 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 | ||||
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Ground Clearance
Rear Axle Differential to Ground: |
6.2 inches | ||||
| Minimum Running Clearance: |
4.2 inches
(Exhaust Pipe at X-Member) |
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| Overall Height: |
47.7 inches (Coupe)
47.8 inches (Convertible) |
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| 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) |
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| 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) |
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| 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 |
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| 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 |
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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 |
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| Transmission Lubricant Type: |
Military MIL-L-2105-B
SAE 80 |
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| Lubricant Capacity: | Four Speed Manual: 2.5 Quarts | ||||
| Differential Lubricant Type: |
Military MIL-L-2105-B
SAE 80 |
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| 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) |
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| Transmission Synchromesh: | All Four Gears | ||||
| Standard Fuel Tank Capacity: | 18 Gallons | ||||
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Steering Wheel Diameter
(Power, Manual Steering): |
15.0 inches | ||||
| Steering Ratio: | 16.1:1 | ||||
| Wheel Turns: |
3.4 (Street)
2.92 (Fast) |
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| Turning Diameters: |
37.0 feet (Curb to Curb)
38.6 feet (Wall to Wall) |
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| Model 19467 Convertible: |
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| Model 19437 Sport Coupe: |
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| 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. | |||||
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| Auxiliary Top (RPO C07): |
+69 lb.
(+59 lb. Front; +10 lb. Rear) |
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| 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) |
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| Power Windows (RPO A31): |
+7 lb.
(+4 lb. Front; +3 lb. Rear) |
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| Power Brakes (RPO J50): |
+10 lb.
(+9 lb. Front; +1 lb. Rear) |
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L82 Engine
250 Horsepower: |
+14 lb.
(+11 lb. Front; +3 lb. Rear) |
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LS4 Engine
270 Horsepower: |
+200 lb.
(+178 lb. Front; +22 lb. Rear) |
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Standard, L82 350 cubic inch Engines
With Turbo Hydra Matic Transmission: |
+54 lb.
(+37 lb. Front; +17 lb. Rear) |
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LS4 Engine
270 Horsepower With Turbo Hydra Matic Transmission: |
+45 lb.
(+31 lb. Front; +14 lb. Rear) |
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| 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 |
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Radio, AM/FM Stereophonic
(RPO U58): |
+18 lb.
(+11 lb. Front; +7 lb. Rear) |
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Radio, AM/FM Pushbutton
(RPO U69): |
+14 lb.
(+7 lb. Front; +7 lb. Rear) |
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| 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) |
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Brakes |
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| Type: | Caliper Disc, Four Wheel Hydraulic |
| Effective Area: | 78.1 Square Inches |
| Swept Area: | 639.4 Square Inches |
| Disc: | Vented |
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Horsepower |
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| 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 |
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Ignition System |
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| 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 |
| Optional Rear Axle Ratios | 1,219 (3.25%) | $12.00 | |
| * | Custom Interior Trim | 19,959 (53.22%) | $154.00 |
| 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 |
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Total Production:
37,502
Notes: Base Corvette Coupe with 350 cu. in. 195 hp engine and wide ratio four speed manual transmission: $6,001.50. |
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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 |