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Corvette Overview --

1991 Specifications
THE C4 CORVETTE - SPECIFICATIONS
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MODEL: 1991 Chevrolet CorvetteBODY STYLE: Two-door Coupe or Convertible, front engine, rear wheel drive
MANUFACTURING LOCATION: Bowling Green, Kentucky

CONSTRUCTION: Fiberglass body, unibody construction with partial, perimeter, rail frame including both steel and stainless steel components.
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VEHICLE NUMBERS (Also known as VIN Numbers):  1G1YY2386M5100001 THRU 1G1YY2386M5118595



VIN SUFFIX: 




Note: For Callaway Twin-Turbo, Chevrolet engine coding was replaced as follows: First two digits for year, next three digits for Callaway sequence, last four digits to match the last four digits of the vehicle identification number.

ENGINE BLOCK NUMBER:


HEAD NUMBER:


ZTA: 350 CUBIC INCH, 245/250 HORSEPOWER, AUTOMATIC TRANSMISSION
ZTB: 350 CUBIC INCH, 245/250 HORSEPOWER, MANUAL TRANSMISSION. ENGINE OIL COOLER
ZTC: 350 CUBIC INCH, 245/250 HORSEPOWER, AUTOMATIC TRANSMISSION, ENGINE OIL COOLER
ZTK: 350 CUBIC INCH, 375 HORSEPOWER
1G1YZ23J6M5800001 THRU 1G1YZ23J6M5802044 (ZR-1)
NOTE: For convertibles, sixth digit is a three.
10153558: 350 CUBIC INCH, 375 HORSEPOWER
14093638: 350 CUBIC INCH, 245/250 HORSEPOWER
10088113: 350 CUBIC INCH, 245/250 HORSEPOWER
10174390: 350 CUBIC INCH, 375 HORSEPOWER (RIGHT HAND)
10174389: 350 CUBIC INCH, 375 HORSEPOWER (LEFT HAND)

1991 CORVETTE FACTORY OPTIONS
CODE:   DESCRIPTION: QUANTITY:      RETAIL PRICE:

1YY07
1YY67
AC1
AC3
AQ9
AR9
B2K
CC2
C2L
24S
64S
C68
FX3
G92
KC4
MN6
NN5
UJ6
UU8
U1F
V56
Z07
ZR1
Base Corvette Sport Coupe
Base Corvette Convertible
Power Passenger Seat
Power Driver Seat
Sport Seats, leather
Base Seats, leather
Callaway Twin Turbo (not GM installed)
Auxillary Hardtop (convertible)
Dual Removable Roof Panels (coupe)
Removable Roof Panel, blue tint (coupe)
Removable Roof Panel, bronze tint (coupe)
Electronic Air Conditioning Control
Selective Ride and Handling, electronic
Performance Axle Ratio
Engine Oil Cooler
6-Speed Manual Transmission
California Emission Requirements
Low Tire Pressure Warning Indicator
Stereo System, Delco-Bose
Stereo System With CD, Delco-Bose
Luggage Rack (convertible)
Adjustable Suspension Package (coupe)
Special Performance Package  (coupe)
14,967
5,672
17,267
19,937
10,650
9,505
71
1,230
5,031
6,991
3,036
19,233
6,894
3,453
7,525
5,875
3,050
5,175
3,786
15,345
886
733
2,044


$32,455.00
$38,770.00
$290.00
$290.00
$1,050.00
$425.00
$33,000.00
$1,995.00
$915.00
$615.00
$615.00
$180.00
$1,695.00
$22.00
$110.00
$0.00
$100.00
$325.00
$823.00
$1,219.00
$140.00
$2,155.00
$31,683.00
COLOR CODES:
CODE     EXTERIORTOTAL    SOFT TOP            INTERIOR COLOR OPTIONS
10
25
35
41
42
75
80
81
91
96

EXTERIOR COLOR TEMPLATE:









INTERIOR COLOR TEMPLATE:
White
Steel Blue Metallic
Yellow
Black
Turquoise Metallic
Dark Red Metallic
Quasar Blue Metallic
Bright Red
Polo Green Metallic
Charcoal Metallic
4,305
835
650
3,909
1,621
1,311
1,038
5,318
1,230
417
Black, Beige, White
Blue, Black, White
Black, Beige, White
Black, Beige, White
Blue, Black
Black, Beige, White
Black, Beige
Black, Beige, White
Black, Beige
Black, White
Blue, Black, Grey, Red, Saddle
Blue, Black
Black, Grey, Saddle
Blue, Black, Grey, Red, Saddle
Black, Saddle
Black, Saddle
Black, Saddle
Black, Grey, Red, Saddle
Black, Saddle
Black, Grey, Saddle


Steel Blue Met.
Yellow
Black
Turq. Metallic
Dark Red Met.
White
Quasar Blue Met.
Bright Red
Black (Leather)
Red (Leather)
Saddle (Leather)
Blue (Leather)
Saddle
Graphite
Base Seats
Sports Seats
Charcoal Met.
Polo Green
Grey (Leather)
CORVETTE COUPE & CONVERTIBLE POWERTRAIN SPECIFICATIONS

ENGINE:  L98 5.7 OHV 350 V-8. Tuned-Port Fuel Injection (COUPE)
BLOCK MATERIAL: Cast Iron Alloy
VALVE TRAIN: OHV, 2 valves per cyl.
TORQUE: 350 lb-ft @ 3,200 rpm
HEAD GASKET THICKNESS: .021 In.
MAX ENGINE RPM: N/A

TOTAL DRESSED ENGINE WEIGHT (DRY)585.7lbs
NOTE: These weights do not includes radiator hoses, coolant, accelerator controls or engine mounting hardware.

TRANSMISSION: 4 Speed Automatic Transmission (Standard), 6 Speed Manual Transmission (Optional)
6 SPEED MANUAL GEAR RATIOS4 SPEED AUTOMATIC GEAR RATIOS








STANDARD AXLE RATIOS: 2.59:1 (AUTOMATIC), 3.07:1 (MANUAL)
2.68:1
1.80:1
1.31:1
1.00:1
0.75:1
0.50:1
2.50:1
3.06:1
1.63:1
1.00:1
0.70:1
2.29:1
DISPLACEMENT: 5.7 Litre/350 Cubic Inches
CYLINDER HEAD MATERIAL: Aluminum
CYLINDER BLOCK DECK HEIGHT: 9.025 Inches
FUEL DELIVERY: Multi-Port Fuel Injection
FUEL CAPACITY:  20.0 Gallons
BORE x STROKE: 4.00 x 3.48 inches
COMPRESSION RATIO: 10.0:1
HORSEPOWER: 245/250 HP @ 4,400 RPM
EST. MPG: N/A
OIL CAPACITY: 4.5 Quarts
ZR-1 CORVETTE COUPE POWERTRAIN SPECIFICATIONS

ENGINE:  LT5 5.7 OHV 350 V-8. Tuned-Port Fuel Injection (COUPE)
BLOCK MATERIAL: Aluminum**
VALVE TRAIN: Double Overhead Cam
CAMSHAFT: Alloy Cast Iron
CRANKSHAFT: Nitrided
TORQUE: 370 lb-ft @ 5,600 rpm
HEAD GASKET THICKNESS: N/A
MAX ENGINE RPM: 7,200

**The engine crankcase, cylinder case, cylinder heads is aluminum with cast-in nodular cast iron bearing inserts.

TOTAL DRESSED ENGINE WEIGHT (DRY)596.0 lbs
NOTE: These weights do not includes radiator hoses, coolant, accelerator controls or engine mounting hardware.

TRANSMISSION: 6 Speed Manual Transmission (Standard)

6 SPEED MANUAL GEAR RATIOS:




STANDARD AXLE RATIOS: 2.59:1 (AUTOMATIC), 3.33:1 (MANUAL)
2.68:1
1.80:1
1.31:1
1.00:1
DISPLACEMENT: 5.7 Litre/349 Cubic Inches
CYLINDER HEAD MATERIAL: Aluminum
LOBE LIFT: 0.39 Inches/9.9 millimeters
CYLINDER BLOCK DECK HEIGHT: 9.025 Inches
FUEL DELIVERY: Tuned-Port Fuel Injection
FUEL CAPACITY:  20.0 Gallons
OIL CAPACITY: 9.6 Quarts
BORE x STROKE: 3.90 x 3.66 inches
BORE STROKE RATIO: 1.07:1
CONNECTING RODS: Forged Steel
COMPRESSION RATIO: 11.0:1
HORSEPOWER: 375 HP @ 5,800 RPM
EST. MPG: N/A
FIRING ORDER: 1,8,4,3,6,5,7,2
1st GEAR:
2nd GEAR:
3rd GEAR:
4th GEAR:
5th GEAR:
6th GEAR:
REVERSE:
1st GEAR:
2nd GEAR:
3rd GEAR:
4th GEAR:
1st GEAR:
2nd GEAR:
3rd GEAR:
4th GEAR:
REVERSE:
0.75:1
0.50:1
2.50:1
5th GEAR:
6th GEAR:
REVERSE:
EXTERIOR DIMENSIONS:
Model
Wheelbase:
Overall Length
Total Body Width 
Overall Height
Front Track Width
Rear Track Width
Ground Clearance
L98 Coupe
96.2 Inches
176.5 Inches
71.0 Inches
46.7 Inches
59.6 Inches
60.4 Inches
4.7 Inches
INTERIOR DIMENSIONS
Model
Headroom
Shoulder Room
Hip Room
Leg Room
L98 Convertible
96.2 Inches
176.5 Inches
71.0 Inches
46.4 Inches
59.6 Inches
60.4 Inches
4.7 Inches
L98 Coupe
36.4 Inches
54.1 Inches
49.3 Inches
42.6 Inches.
L98 Convertible
36.5 Inches
54.1 Inches
49.3 Inches
42.6 Inches
ZR-1 Coupe
96.2 Inches
177.4 Inches
74.0 Inches
46.4 Inches
61.9 Inches
61.9 Inches
4.9 Inches
ZR-1 Coupe
36.4 Inches
54.0 Inches
49.3 Inches
42.6 Inches
CAPACITIES
Model
Passenger Capacity
Curb Weight - Automatic (LBS)
Curb Weight - Manual (LBS)
Cargo Volume (CU.FT)
Fuel Capacity (GALLONS/LITERS)
Engine Oil Capacity (QTS./LITERS)
Coolant Capacity (QTS./LITERS)
Coefficient of Drag
Weight Dist. Front/Rear (%)
L98 Coupe
2 - Driver & Passenger
3,294
3,330
17.9 Cubic Feet
20.0/76.0
4.5
14.6
0.33
50/50
L98 Convertible
2 - Driver & Passenger
3,294
3,336
17.9 Cubic Feet 
20.0/76.0
4.5
14.6
N/A
50/50
ZR-1 Coupe
2 - Driver & Passenger
3,470
3,465
12.6 Cubic Feet
20.0/76.0
8.0 (appx.)
14.6
N/A
50/50
WHEELS/TIRES
Coupe/Convertible
Front Tires: Goodyear Eagle ZR, P275/40ZR-17    Wheels: 17 x 9.5 Inches, 5 Bolt Cast Alloy
Rear Tires: Goodyear Eagle ZR, P275/40ZR-17    Wheels: 17 x 9.5 Inches, 5 Bolt Cast Alloy

ZR-1 Coupe
Front Tires: Goodyear Eagle ZR, P275/40ZR-17    Wheels: 17 x 9.5 Inches, 5 Bolt Cast Alloy
Rear Tires: Goodyear Eagle ZR, P315/35ZR-17 ZR-1   Wheels: 17 x 11 Inches, 5 Bolt Cast Alloy

SUSPENSION:
Coupe/Convertible
FRONT: Independent, unequal length upper and lower A-arms, transverse fiberglass leaf spring, tubular hydraulic shock absorbers, anti-roll bar.
REAR: Independent, upper and lower trailing arms, lateral arms, tie rods, halfshafts, transverse fiberglass leaf springs, tubular hydraulic shock absorbers, anti-roll bar.

ZR-1 Coupe
FRONT: Single fiberglass composite monoleaf transverse spring with unequal-length aluminum control arms and stabilizer bar. 
REAR: Fully independent five-link system with transverse fiberglass single-leaf springs, aluminum upper/lower trailing links and strut-rod tie-rod assembly.

BRAKES.
Coupe/Convertible
TYPE: ABS Power-Assist Vented Brakes
FRONT ROTORS (Diameter): 12.0 Inches 
REAR ROTORS (Diameter): 12.0 Inches

ZR-1 Coupe
TYPE: ABS Power-Assist Vented Brakes
FRONT ROTORS (Diameter): 13.0 Inches
REAR ROTORS (Diameter): 13.0 Inches 

PERFORMANCE RESULTS
Model:
0-30 MPH:
0-60 MPH:
0-100 MPH:
QUARTER MILE:
TOP SPEED (MPH):
L98 Coupe
N/A
5.3 Seconds
N/A
13.9 Seconds
N/A
L98 Convertible
N/A
5.6 Seconds
N/A
14.1 Seconds
N/A
ZR-1 Coupe
2.1 Seconds
4.9 Seconds
11.2 Seconds
13.2 Sec/108mph
171
L98 Convertible
ZR-1 Coupe
Callaway
N/A
N/A
N/A
N/A
192
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