NOTE:  This page contains information specific to the 1987 model year Corvette.  However, I highly recommend this book for anyone with a fourth-generation Corvette, whether it's an L-83, an L-98, a LT-1 or LT-4, or a LT-5 powered vehicle.

If OEM specifications are of interest to you, this book has it all.

CAR MODELS:

Model description: Corvette

Body type & model number: 2-door hatchback coupe (1YY07) & 2-door convertible (1YY67)

Seating positions: 2 front

Maximum cargo load: 100 lb

POWER TEAMS:

Engine: RPO L98, V8, 350 cid

Availability: Coupe and convertible, all states

Carburetion: Tuned port fuel injection

Compression ratio: 9.5:1

Horsepower: 240 hp @ 4000 rpm

Transmissions: Manual 4-speed (overdrives in 2nd, 3rd and 4th gear), automatic (4-speed)

ENGINE, GENERAL:

Type and description: 90° V, front, longitudinal

Manufacturer: Chevrolet

Number of cylinders: 8

Bore: 4.0"

Stroke: 3.48"

Bore spacing (C/L to C/L): 4.4"

Cylinder block material and weight, machined: Cast alloy iron 142.7 lb

Cylinder block deck height: 9.025"

Deck clearance (minimum) (above or below block): .025" below

Cylinder head material: Aluminum

Cylinder head weight: 22.0 lbs

Head gasket thickness (compressed): .021"

Minimum combustion chamber total volume: 4.6 cu-in

Cylinder number system front to rear: 1-3-5-7 (left), 2-4-6-8 (right)

Firing order: 1-8-4-3-6-5-7-2

Intake manifold material & weight: Cast aluminum 14.77 lb

Exhaust manifold material & weight: Stainless steel 6.38 lb LH, 6.38 lb RH

Recommended fuel: unleaded

Fuel antiknock index (R+M/2): 91

Total dressed engine weight dry*: 541.2 lb automatic transmission, 592.2 lb manual transmission

*All those items necessary to make the engine a complete ready-to-run unit.

ENGINE, PISTONS:

Material: Impacted cast aluminum

Weight: 21.1 oz

ENGINE, CAMSHAFT:

Location: In cylinder block "V" above crankshaft

Material: Cast alloy iron

Weight: 9.3 lb

Drive type: Chain

Drive width/pitch: .625"/.500"

ENGINE, VALVE SYSTEM:

Hydraulic lifters: Standard

Valves, number intake/exhaust: 8/8

Valves, head O.D. intake/exhaust: 1.94"/1.50"

ENGINE, CONNECTING RODS:

Material & weight: 1037 or 1038 steel, .855 lb

ENGINE, CRANKSHAFT:

Material: Nodular cast iron

Weight: 50.49 lb

End thrust taken by bearing #: 5

Number of main bearings: 5

ENGINE, LUBRICATION SYSTEM:

Normal oil pressure: 50-65 psi @ 2000 rpm

Type oil intake: Stationary

Oil filter system: Full flow

Capacity of case, less oil filter: 4.0 qt

ENGINE, COOLING SYSTEM:

Coolant recovery system: Standard

Coolant fill location: Bottle, coolnt recovery

Radiator cap relief valve pressure: 18 psi

Circulation thermostat type: Choke

Thermostat starts to open at: 195° F

Water pump type: Centrifugal with cast aluminum housing

Water pump gallons-per-minute @ 1000 rpm: 13 gpm

Water pump quantity: 1

Water pump drive belt: Single belt poly "V" accessory drive, serpentine (0.84" wide, 0.20" thick, with uniform

dynamic tensioner.

Bypass recirculation: Internal

Capacity with air conditioning: 14.65 qt with manual, 14.5 qt with automatic

Water jackets full length of cylinder: Yes

Water all around cylinder: Yes

Radiator core standard, AC, HD: A/C, standard

Radiator type: Cross-flow

Radiator material: Aluminum header, tubes and fins, plastic tanks

Radiator width: 23.6"

Radiator height: 15.0"

Radiator thickness: 0.9" base, 1.3" RPO V01

Radiator fins per inch: 2.5

Radiator end tank material: Plastic

Fan standard: Electric standard, electric boost optional

Fan number of blades & type: 5 high efficiency curved blades and ring shroud, plastic

Fan diameter: 16.7"

Fan cutout type: Temperature switch

Fan drive type: Electric

Fan rpm at idle: 2100

Fan motor rating: 150 amperage

Fan motor switch type: Temperature switch

Fan motor switch point: 223° F

Fan shroud material: Plastic-ring shroud

ENGINE, FUEL SYSTEM:

Induction type: Tuned port fuel injection

Idle air fuel mixture: Preset, no adjustment provided

Point of injection: Fuel injctors at inlet ports

Constant or pulse flow: Pulse

Control: Electronic, on-board computer

Intake mfd heat control: Water, thermostat

Air cleaner type standard: Replaceable paper element

Fuel pump type: Electric, dual turbine

Fuel pump location: In fuel tank

FUEL TANK:

Capacity: 20.0 gallons

Location: Under rear deck

Attachment: Rests on rear frame extension, held with straps

Material: Super Terne-coated steel with high density polyethylene liner

Filler pipe location: Center of rear deck

Filler pipe connection to tank: Bolted with gasket to top of tank

Fuel line material: Super Terne-coated steel

Fuel hose material: Viton

Return line material: Super Terne-coated steel

Vapor line material: Super Terne-coated steel

VEHICLE EMISSION CONTROL:

Type: Air injection w/ Computer Command Control

Air Injection pump or pulse: Vane

Air injection driven by: Single serpentine belt poly "V" drive

Air injection air distribution: Exhaust manifold and converter (CCC controlled)

Air injection point of entry: Exhaust manifold ports

Exhaust gas recirculation type: Controlled flow

Exhaust gas recirculation exhaust source: Inlet manifold exhaust crossover passage

Exhaust gas recirculation point of exhaust injection: Center of intake manifold plenum

Catalytic converter type: Platinum-Palladium and Rhodium, dual bed

Catalytic converter quantity: Two front, one rear

Catalytic converter volume: 169.6 cu in

Catalytic converter location: Front: one on each exhaust pipe; Rear: underbody tunnel below console

Catalytic converter substrate type: Monolith

Crankcase emission control type: Induction type

Crankcase emission control energy source: Manifold vacuum

Crankcase emission control discharge: Inlet manifold

Crankcase emission control air inlet: Air cleaner

Evaporative emission control vapor vented to: Fuel tank canister

Evaporative emission control vapor storage provision: Canister

Electronic system closed loop: Yes

Electronic system open loop: No

ENGINE, EXHAUST SYSTEM:

Type: Dual

Muffler number and type: Two, reverse flow (stainless steel body, aluminum-coated steel inlet and outlets)

Resonator number and type: None

Exhaust pipe branch o.d. & wall thickness: Outer pipe 2.50" x .038", inner pipe 2.25" x .038"

Exhaust pipe main o.d. & wall thickness: 3.0" x .072"

Exhaust pipe material: Aluminum-coated steel

Tailpipe o.d. & wall thickness: Dual outlets, 2.25" x .072"

Tailpipe material: Aluminum-coated steel

TRANSMISSION:

Manual 4-speed: Optional, RPO MH5 base, RPO MK2 w/ Z51

Automatic overdrive: Standard

MANUAL TRANSMISSION:

Number of forward speeds: 4 in direct drive, 3 in overdrive (Planetary gear set overdrive controlled by on-board

computer)

Transmission ratio in first: 2.88:1

Transmission ratio in second: 1.91:1 direct, 1.30:1 overdrive

Transmission ratio in third: 1.34:1 direct, 0.91:1 overdrive

Transmission ratio in fourth: 1.00:1 direct, 0.68:1 overdrive

Transmission ratio in overdrive: 0.68:1 overdrive

Transmission ratio in reverse: 2.78:1

Synchronous meshing: All forward

Shift lever location: Floor

Lubricant capacity: 2.1 pt (3.45 pt for overdrive unit)

Lubricant type recommended: GL-5 (Dexron II for overdrive unit)

Lubricant SAE viscosity: 80W or 80W-90 (summer/winter), 80W (extreme cold)

CLUTCH (MANUAL TRANSMISSION):

Make, type, engagement: Borg & Beck, hydraulically activated slave cylinder, automatic adjustment

Assist: No

Type pressure plate springs: Bellville

Total spring load: 2300 lb

Number of clutch driven discs: One

Clutch facing material: Non-asbestos

Clutch facing manufacturer: Valeo

Clutch facing part number: F-202

Clutch facing rivets/plate: 32

Clutch facing outside and inside diameter: 10.75" x 6.5"

Clutch facing total effective area: 53.4 sq in

Clutch facing thickness: 0.305"

Clutch facing engagement cushion method: Driven plate, cushion springs

Release bearing type and method of lubrication: Ball thrust, prepacked and sealed

Torsional damping method: Coil springs and metal-to-metal friction

AUTOMATIC TRANSMISSION:

Trade name: 4-speed automatic (overdrive 4th gear)

Type and special features: Torque converter with planetary gears, computer controlled torque converter clutch

2nd, 3rd and 4th gears

Selector location: Floor mounted in console

Selector letter/number designation: PRN D D21

Gear ratio R: 2.29:1

Gear ratio D: 1.00:1

Gear ratio 2: 1.63:1

Gear ratio 1: 3.06:1

Gear ratio overdrive: 0.70:1

Maximum upshift speed: 1-2 = 43 mph, 2-3 = 79 mph, 3-4 = 116 mph (at wide-open throttle)

Maximum kickdown speed: 4-3 = 105 mph, 3-2 = 72 mph, 2-1 = 35 mph

Minimum overdrive speed: 38 mph

Torque converter elements: 3

Torque converter maximum ratio at stall: 1.85:1

Torque converter type of cooling: Liquid

Torque converter nominal diameter: 11.75"

Lubricant capacity: 8.0 pts

Lubricant type recommended: Dexron II

Oil cooler: Standard, external, liquid

AXLE:

Type: Rear

Description: Overhung pinion gear

Limited slip differential type: Standard, disc clutches

Drive pinion offset: 1.50" (8.5" ring gear), 1.125" (7.87" ring gear)

Drive pinion type: Hypoid

Number of differential pinions: 2

Pinion/Differential bearing adjustment: Shim

Driving wheel bearing: Tapered roller

Lubricant capacity: 3.75 pt

Lubricant type recommended: GL-5 gear lubricant

Lubricant SAE viscosity: 80W or 80W-90 summer, winter or extreme cold

AXLE RATIOS:

2.59:1 ratio: 17 pinion teeth, 44 ring teeth, 7.875" ring gear outside diameter

2.73:1 ratio: 15 pinion teeth, 41 ring teeth, 7.875" ring gear outside diameter

3.07:1 ratio: 14 pinion teeth, 43 ring teeth, 7.875" ring gear outside diameter

3.07:1 ratio: 14 pinion teeth, 43 ring teeth, 8.5" ring gear outside diameter (manual transmission)

PROPELLER SHAFT, REAR WHEEL DRIVE:

Type: Straight tube, internal-external damper

Material: Aluminum with manual transmission.  Steel with automatic transmission except aluminum when

automatic combined with RPO Z51 and RPO AG9 power seat

Outer diameter: 3.0" aluminum, 2.5" steel

Length: 31.7" manual, 32.5" automatic

Wall thickness: 0.12" aluminum, .065 steel

Intermediate bearing type: None

Slip yoke type: Splined yoke

Slip yoke number of teeth: 26

Slip yoke spline o.d.: 1.17"

Universal joints make & manufacturing number: #1311 front, #1318 rear

Universal joints used: 2

Universal joints type: Cross

Universal joints rear attachment: Strap and bolt

Universal joints bearing type: Anti-friction

Universal joints lubrication: Prepack

Drive taken through: Driveline beam

Torque taken through: Torque control arms

SUSPENSION, GENERAL:

Provision to brake dip control: Front suspension geometry  upper arms positioned to produce 46% anti-dive

Provision for acceleration squat control: Rear suspension geometry  control arms positioned to produce 62%

anti-squat

Provision for car jacking: Place jack head between locator triangles on rocker flange nearest to wheel being

changed

Shock absorber type: Direct double acting hydraulic w/pliacell expansion bags (base).  Gas pressure (optional)

Shock absorber make: Delco, (base) Bilstein (optional)

Shock absorber piston diameter: Front 1.0" (base), rear 1.26" (base); front 1.42" (Bilstein), rear 1.81" (Bilstein)

Shock absorber rod diameter: 0.49" (base), 0.43" (Bilstein)

SUSPENSION, FRONT:

Type and description: Independent SLA (short long arms).  Forged aluminum upper and lower control arms and

steering knuckle, transverse monoleaf spring and steel stabilizer, spindle offset

Travel full jounce: 3.6"

Travel full rebound: 3.7"

Spring type: Monoleaf, filament wound glass-epoxy composite

Spring insulators: Pivot; Teflon-filled nylon and aluminum; enclosed in rubber

Spring size: 45.7" x 3.9" x 0.52" (base); 45.7" x 3.9" x 0.56" (Z51)

Spring rate: 296 lb/in (base); 380 lb/in (Z51)

Spring rate at wheel: 92.6 lb/in (base); 110.9 lb/in (Z51)

Stabilizer material and bar diameter: HR steel; 0.9" (base); 1.2" (Z51)

SUSPENSION, REAR:

Type and description: Independent 5-link design with toe and camber adjustment, forged aluminum control

arms, knuckles and struts; transverse monoleaf spring, steel tie rods and stabilizer.  Tubular U-jointed

driveshafts, aluminum except with automatic.

Travel full jounce: 3.6"

Travel full rebound: 2.8"

Spring type: Monoleaf, filament wound glass-epoxy composite

Spring insulators: Dual rubber polyisoprene

Spring size: 48.7" x 2.24" x 0.87" (base); 48.7" x 2.24" x 0.98" (Z51)

Spring rate: 233 lb/in (base); 330 lb/in (Z51)

Spring rate at wheel: 130.2 lb/in (base); 173.6 lb/in (Z51)

Number of leaves: Monoleaf

Spring shackle: Tension

Stabilizer type: Link

Stabilizer material and bar diameter: HR steel; 0.86" (base); 0.87" (Z51), painted to protect against corrosion

BRAKES, SERVICE:

Description: Aluminum caliper with nodular iron reaction bracket; pad reaction through bracket

Brake type front: Disc with sliding head caliper, Low drag

Brake type rear: Disc with sliding head caliper, Low drag

Self-adjusting: Standard

Special valving type: Proportioning, integral with master cylinder

Power brake: Standard

Booster type: Integral; lightweight with tru-bolt reaction system

Vacuum source: Inline (intake manifold)

Anti-lock device type: Electronic 4-wheel, 3-channel (standard)

Effective area: 27.0 sq in (front), 18.3 sq in (rear)

Gross lining area: 27.0 sq in (front), 18.3 sq in (rear)

Swept area: 96.4 sq in (front), 87.5 sq in (rear)

Rotor outer working area: 11.5" (front), 11.5" (rear)

Rotor inner working area: 8.42" (front), 8.75" (rear)

Rotor thickness: 0.8" (front), 0.8" (rear)

Rotor material and type: Vented; gray cast iron (front), damped iron (rear)

Wheel cylinder bore: 2.1" (front), 1.6" (rear)

Master cylinder bore: 0.862"

Master cylinder stroke: 0.49"

Pedal arc ratio: 3.5:1

Line pressure at 100 lbs pedal load: 1250 psi (front), 800 psi (rear)

Lining clearance: Self-adjusting

Front brake lining bonding: Integral molded

Front brake lining manufacturer: Japan Brake Industries

Front brake lining code: CP26

Front brake lining material: Semi-metallic

Front brake lining size primary: 5.2" x 1.52" x 0.34"

Front brake lining size secondary: 4.4" x 1.56" x 0.34"

Front brake shoe thickness: 0.22" backing plate

Rear brake lining bonding: Integral molded

Rear brake lining manufacturer: Japan Brake Industries

Rear brake lining code: CP26

Rear brake lining material: Semi-metallic

Rear brake lining size primary: 4.25" x 1.38" x 0.34"

Rear brake lining size secondary: 3.62" x 1.42" x 0.34"

Rear brake shoe thickness: 0.2" backing plate

TIRES AND WHEELS (STANDARD):

Tire size: P255/50VR-16 B/W

Tire type: High speed steel belted radial Eagle VR50 unidirectional, Goodyear

Tire inflation front: 35 psi

Tire inflation rear: 35 psi

Wheel type and material: Aluminum alloy road wheels with specific vent design

Wheel rim size: 16" x 8.5" (front); 16" x 8.5" (rear)

Wheel offset: 1.26"

Attachment type: Stud

Attachment circle diameter: 4.75"

Attachment number and size: 5 hex nuts, one anti-theft; M12x1.5-6H

Spare tire and wheel: P155/80D-16, 16" x 4" steel wheel

Spare tire storage position and location: Horizontal under fuel tank

TIRES AND WHEELS (OPTIONAL):

Tire size: P255/50VR-16 B/W (Z51)

Tire type: High speed steel belted radial Eagle VR50 unidirectional, Goodyear (Z51)

Tire inflation front: 35 psi

Tire inflation rear: 35 psi

Wheel type and material: Aluminum alloy road wheels with specific vent design (Z51)

Wheel rim size: 16" x 9.5" (front); 16" x 9.5" (rear 1.5" offset) (Z51)

Wheel offset: 1.26"

Attachment type: Stud

Attachment circle diameter: 4.75"

Attachment number and size: 5 hex nuts, one anti-theft; M12x1.5-6H

Spare tire and wheel: P155/80D-16, (aluminum 16" x 4" wheel with power seat option RPO AG9)

Spare tire storage position and location: Horizontal under fuel tank

BRAKES, PARKING:

Type of control: Grip handle control

Location of control: Below the top of door sill, at the driver's left.

Operates on: Rear brake drums, integral with disc rotor

Type (if separate from service brakes): Internal, manual duo-serve.

Drum diameter (if separate from service brakes): 7.0"

Lining size (if separate from service brakes): 6.78" x 1.25" x 0.175"

STEERING:

Power: Standard

Adjustable steering wheel/column type: Black, leather-wrapped two-spoke steering wheel, tilt and telescopic

Wheel diameter, power: 14.5"

Turning diameter, outside front, wall to wall: 41.4 ft

Turning diameter, inside front, curb to curb: 40.4 ft

Turning diameter, outside rear, wall to wall: 25.0 ft

Turning diameter, inside rear, curb to curb: 25.0 ft

Power type: Alloy rack and pinion

Power manufacturer: Saginaw Steering Gear; lightweight transverse compact pump

Power gear type: End take-off

Power gear ratios: 15.1:1 (base); 13.0:1 (RPO Z51)

Power pump drive: Accessory belt driven

Power number wheel turns stop to stop: 2.36 turns (base), 1.96" turns (RPO Z51)

Linkage type: End take-off

Linkage location: Front of wheel

Linkage tie rods: Two

Axis inclination at camber: 8.744°

Axis bearings upper: Ball joint (M/M w/ anti-friction washer; anti-corrosive)

Steering spindle and joint type: Upper and lower ball joints; anti-corrosive

Wheel spindle hub diameter  inner bearing: 2.0"

Wheel spindle hub diameter  outer bearing: 2.0"

Wheel spindle hub bearing type: Unit hub bearing assembly with double row balls; anti-corrosive

WHEEL ALIGNMENT:

Front wheel at curb mass, service caster: 6.0°, +/- 0.5°

Front wheel at curb mass, service camber: 0.8°, +/- 0.8°

Front wheel at curb mass, service toe-in: 0.0°, +/- 0.1°

Rear wheel at curb mass, service camber: 0.0°, +/- 0.5°

Rear wheel at curb mass, service toe-in: 0.0°, +/- 0.1°

ELECTRICAL INSTRUMENTS AND EQUIPMENT:

Speedometer type: Electronic liquid crystal, digital and analog, English or Metric

Speedometer trip odometer: Standard

Charge indicator type: Digital display

Charge indicator warning device: Standard warning indicator and digital readout

Temperature indicator type: Digital display

Temperature indicator warning device: Standard warning indicator and digital readout

Oil pressure indicator type: Digital display

Oil pressure indicator warning device: Standard warning indicator and digital readout

Fuel indicator type: Electric liquid crystal--analog

Fuel indicator warning device: Standard warning indicates low fuel

Windshield wiper type standard: Intermittent control system

Windshield wiper blade length: 20"

Windshield wiper swept area: 1,072.9 sq in

Windshield washer type standard: Push button manual

Horn type: Vibrator

Horn number used: Two

Other: Tell-tale lights warning of unfastened seat belts (FASTEN BELTS), low brake line pressure or parking

brake on (BRAKE), anti-theft alert (SECURITY), electronic control module malfunction (CHECK ENGINE), door

ajar (DOOR AJAR), hatch ajar (HATCH AJAR), 4-speed manual overdrive engaged (OVERDRIVE ENGAGED).

Drivers information system, mileage range, instant and average mpg, and trip odometer also included as standard

equipment.

ELECTRICAL SUPPLY SYSTEM:

Battery manufacturer: Delco-Remy

Battery model: 75-630, standard

Battery voltage: 12 volts

Battery amps at 0° cold crank: 630 cold cranking amps (CCA)

Battery minutes at reserve capacity: 90 minute reserve capacity

Battery amp/hrs, 20 hr rate: 54 amp/hrs

Battery location: Engine compartment directly behind left wheel opening

Alternator manufacturer: Delco-Remy

Alternator rating: 105 amps

Alternator ratio (alt crank/rev): 3.24:1

Alternator optional: none

Regulator type: Micro circuit unit; integral with alternator

ELECTRICAL STARTING SYSTEM:

Starter motor current drain at 0°F: 350 amps

Motor drive engagement type: Positive shift solenoid