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1968 - 1982 Corvette Powertrain Combinations


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Below is a complete listing of 1968 - 1982 Corvette Powertrain combinations:

1968 Corvette Powertrain Combinations

Engine Size H.P. @ RPM Torque @ RPM Compression Ratio Transmission Combination Axle Ratios**
A B C D
327 300 @ 5000 360 @ 3400 10.0:1 Manual Base  A/C 3.36
3.36
3.08
3.08
--
--
--
--

Auto.

Base   

A/C

3.08

3.08

--

--

--

--

--

--

327

350

@

5800

 

360

@

3600

11.0:1 4-Spd

Base   

A/C

3.36

3.36

--

--

3.55

3.55

--

--

4-Spd*

Base   

A/C

3.70

3.70

--

--

4.11

4.11

--

--

427

390

@

5400

460

@

3600

10.25:1 4-Spd

Base   

A/C

3.08

3.08

--

--

3.36

3.36

--

--

4-Spd*

Base   

A/C

3.36

3.36

3.08

3.08

3.55

3.55

3.70

3.70

Auto.

Base   

A/C

3.08

3.08

2.73

2.73

--

--

--

--

427

400

@

5400

460

@

3600

10.25:1 4-Spd

Base   

A/C

3.08

3.08

--

--

3.36

3.36

--

--

4-Spd*

Base   

A/C

3.36

3.36

3.08

3.08

3.55

3.55

3.70

3.70

Auto.

Base   

A/C

3.08

3.08

2.73

7.73

--

--

--

--

427

435

@

5800

460

@

4000

11.0:1

      4-Spd*

3.55 3.36 3.70 4.11
427

430

@

4600

485

@

4000

12.5:1

      4-Spd*

3.36 3.08 3.55 3.70

4.11

4.56

* Indicates close-ratio-4-Speed            **A - Standard;    B - Economy;    C - Performance;    D - Special Purpose

Note:  Positraction axles were available optionally for 327 cubic-inch engines with manual transmissions.

All other engine/transmission combinations were available as Positraction only.

1969 Corvette Powertrain Combinations

Engine Transmission Rear Axle Ratio (:1)
Without Air Cond. With Air Cond.
Std. Optional Std. Optional
Econ Perf Spcl Econ Perf Spcl
  BASE ENGINE
  300 HP

  Turbo-Fire 350

   350-Cu.-In. V8

 

3-Speed

(2.54:1 Low)

3.36

*

3.08

**

   

3.36

*

 

3.08

**

   

4-speed

(2.52:1 Low)

Turbo

Hydra-Matic

3.08

**

 

3.08

**

 
 OPTIONAL ENGINES
  350 HP

  Turbo-Fire 350

  350-Cu.-In. V8

  RPO L46

4-speed

(2.52:1 Low)

3.36

*

 

3.55

**

 

3.36

*

 

3.55

**

 

4-Speed

(2.20:1 Low)

 

3.70

*

4.11

**

3.70

*

4.11

**

  390 HP

  Turbo-Jet 427

  427-Cu.-In. V8

  RPO L36

4-speed

(2.52:1 Low)

3.08

**

 

3.36

**

 

3.08

**

     

4-Speed

(2.20:1 Low)

 

3.36

**

3.08

**

3.55

**

3.70

**

Air Conditioning

Not Available

Turbo

Hydra-Matic

3.08

**

2.73

**

   

3.08

**

2.73

**

   
  400 HP

  Turbo-Jet 427

  427-Cu.-In. V8

  RPO L68

4-speed

(2.52:1 Low)

3.08

**

 

3.36

**

 

3.08

**

     

4-Speed

(2.20:1 Low)

3.36

**

3.08

**

3.55

**

3.70

**

Air Conditioning

Not Available

Turbo

Hydra-Matic

3.08

**

2.73

**

   

3.08

**

2.73

**

   
  435 HP

  Turbo-Jet 427

  427-Cu.-In. V8

  RPO L71

4-Speed

(2.20:1 Low)

3.55

**

3.36

**

3.70

**

4.11

**

Air Conditioning

Not Available

Turbo

Hydra-Matic

3.08

**

2.73

**

3.36

**

 
 SPECIAL HIGH PERFORMANCE ENGINE (OFF-ROAD APPLICATION ONLY)

  430 HP

  Turbo-Jet 427

  427-Cu.-In. V8

  RPO L88

H.D. 4-Speed

(2.20:1 Low)

3.36

**

3.08

**

3.55

**

3.70

4.11

4.56

**

Air Conditioning

Not Available

Turbo

Hydra-Matic

3.08

**

2.73

**

3.36

**

 

*Positraction available.        **Positraction required.

1970 Corvette Powertrain Combinations

Engine Transmission Ratio Without Air Conditioning Ratio With Air Conditioning
Std. Optional Std. Optional
Econ. Perf. Econ. Perf.
   BASE ENGINE

  300 HP

  350-Cu.-In. V8

  Turbo-Fire 350

 

 

Turbo Hydra-matic

3.08 - 3.36 3.08 - 3.36

4-Speed (2.52:1 low)

3.36 3.08 - 3.36 3.08 -
OPTIONAL ENGINES
   350 HP (RPO L46)

  350-Cu.-In. V8

  Turbo-Fire 350

 

4-Speed (2.20:1 low)

3.70 - 4.11 Air Conditioning Not Available

4-speed (2.52:1 low)

3.36 - - 3.36 - 3.55
  370 HP (RPO LT1)

  350-Cu.-In. V8

  Turbo-Fire 350

4-Speed (2.20:1 low)

3.70 3.55 4.11 Air Conditioning Not Available

4-speed (2.52:1 low)

3.55 3.36 3.70
   390 HP (RPO LS5)

  454-Cu.-In. V8

  Turbo-Jet 454

Turbo Hydra-matic

3.08 2.73 - 3.08 - -

4-Speed (2.20:1 low)

3.36 3.08 3.55* Air Conditioning Not Available
4-speed (2.52:1 low) 3.08 - 3.36 3.08 - -
    460 HP (RPO LS7)

   454-Cu.-In. V8

   Turbo-Jet 454

Turbo Hydra-matic 3.08 - 3.36

Air Conditioning Not Available

4-Speed (2.20:1 low)

3.36 3.08 3.55

*Special 3.70 ratio also available.

Note:  The LS7  engine was not produced for retail sale.

1971 Corvette Powertrain Combinations

Engine Transmission Ratio Without Air Conditioning Ratio With Air Conditioning
Std. Optional Std. Optional
Econ. Perf. Econ. Perf.
Base engine
  270-hp (210-hp†)

  350-Cu.-In.

  Turbo-Fire 350 V8

Turbo Hydra-matic

3.08 - 3.36 3.08 - 3.36

4-Speed (2.52:1 low)

3.36 3.08 - 3.36 3.08 -
  Available engines
  330-hp (275-hp†)

  350-Cu.-In. (RPO LT1)

  Turbo-Fire 350 V8

4-Speed (2.20:1 low)

3.70 3.55 4.11

Air Conditioning Not Available

4-speed (2.52:1 low)

3.55 3.36 3.70
  365-hp (285-hp†)

  454-Cu.-In. (RPO LS5)

  Turbo-Jet 454 V8

Turbo Hydra-matic

 

3.08 - 3.36 3.08 - -

4-Speed (2.20:1 low)

 

3.36 3.08 3.55* Air Conditioning Not Available

4-speed (2.52:1 low)

3.08 - 3.36 3.08 - -

425-hp (325-hp†)

454-Cu.-In. (RPO LS6)

Turbo-Jet 454 V8

Turbo Hydra-matic

 

3.08 - 3.36 Air Conditioning Not Available

4-Speed (2.20:1 low)

 

3.36 3.08 3.55

Special 4-Speed (2.20:1 low)

3.36 3.08 3.55**

†SAE net (as installed) horsepower rating.    *Special 3.70 ratio also available.    **Special 3.70 or 4.11 ratio also available.

1972 Corvette Powertrain Combinations

ENGINES TRANSMISSIONS POSITRACTION AXLE RATIOS
Std. Economy Perf. Special

Standard:  200-hp †

Turbo-Fire 350 V8

Std:  4-Speed (2.52:1 low) 3.36 3.08 - -
Turbo Hydra-matic 3.08 - 3.36 -

AVAILABLE ENGINES

255-hp †

Turbo-Fire 350 V8 (RPO LT1)

4-Speed (2.52:1 low) 3.55 3.36 3.70 -
4-Speed (2.20:1 low) 3.70 3.55 4.11 -
Special 4-Speed (2.20:1 low) 3.36 3.08 3.55

3.70,

4.11

270-hp†

Turbo-Jet 454 V8 (RPO LS5*)

4-Speed (2.52:1 low) 3.08 - 3.36 -
4-Speed (2.20:1 low) 3.36 3.08 3.55 3.70
Turbo Hydra-matic 3.08 - 3.36** -

†Net horsepower ratings, in accordance with Society of Automotive Engineers Standards, represent the power output of engines as installed in the automobile.

*Not available in California.

**Not available with air conditioning.

1973 Corvette Powertrain Combinations

Engine Type Compr. Ratio Net H.P. Net Torque Transmission Positraction Axle Ratios(:1)
"A" "C"

350

L48

8.5:1 190 270 4-Speed Manual WR 3.36 3.08 -
Turbo Hydra-Matic* 3.08 - 3.36

350

L82*

9.0:1 250 285 4-Speed Manual WR 3.55 3.36 3.70#
 4-Speed Manual CR* 3.70 3.55a -
Turbo Hydra-Matic* 3.55 3.36 3.70

454

LS4*

8.25:1 275 395 4-Speed Manual WR 3.08 - 3.36
4-Speed Manual CR* 3.36b - 3.55b
Turbo Hydra-Matic* 3.08 - 3.36

*Optional

A - Standard Axle

B - Economy Axle (optional)

C - Performance Axle (optional)

# - 3.55 with Air Conditioning

WR - Wide Ratio (2.52:1 low)

CR - Close Ratio (2.20:1 low)

Air Conditioning not available with 3.70:1 axle ratio or Z07 Off-Road Suspension Package.

a - 3.70 standard with RPO Z07 Off-Road Package; 4.11, 3.55 & 3.36 optional

b - With  RPO Z07, 3.55 standard; 3.08 & 3.36 optional

1974 Corvette Powertrain Combinations

Engine Type Compr. Ratio Net H.P. Net Torque Transmission Positraction Axle Ratios(:1)
"A" "B" "C"

350

L48

8.5:1 195 275 4-Speed Manual WR 3.36# 3.08# -
Turbo Hydra-Matic* 3.08# - 3.36#

350

L82*

9.0:1 250 285 4-Speed Manual WR 3.55# - 3.70
 4-Speed Manual CR* 3.70 3.55#a -
Turbo Hydra-Matic* 3.55# - 3.70

454

LS4*

8.25:1 270 380 4-Speed Manual WR 3.08# - 3.36
4-Speed Manual CR* 3.36#b 3.08# 3.55b
Turbo Hydra-Matic* 3.08# - 3.36

*Optional

A - Standard Axle

B - Economy Axle (optional)

C - Performance Axle (optional)

WR - Wide Ratio (2.52:1 low Muncie - 2.64:1 low Warner)

CR - Close Ratio (2.20:1 low Muncie - 2.43:1 low Warner)

# - Air Conditioning available

Air Conditioning not available with Z07 Off-Road Package.

a - 3.70 standard with RPO Z07 Off-Road Package; 4.11, 3.55 & 3.36 optional

b - With  RPO Z07, 3.55 standard; 3.08 & 3.36 optional

1975 Corvette Powertrain Combinations

Engine Type Compr. Ratio Net H.P. Net Torque Transmission Positraction Axle Ratios(:1)
"A" "B" "C"

350

L48

8.5:1 165 255 4-Speed Manual WR 3.36 3.08 -
Turbo Hydra-Matic 400* 3.08 2.73 -

350

L82*

9.0:1 205 255 4-Speed Manual WR 3.55 - -
 4-Speed Manual CR* 3.55 - 3.70
Turbo Hydra-Matic 400* 3.36 - 3.55

*Optional

A - Standard Axle

B - Highway Axle (optional)

C - High-Altitude/Performance Axle (optional)

WR - Wide Ratio ( 2.64:1 low )

CR - Close Ratio ( 2.43:1 low )

Air Conditioning available with all axle ratios except 3.70.

1976 Corvette Powertrain Combinations

Engine Type Compr. Ratio Net H.P. Net Torque Transmission Positraction Axle Ratios(:1)
"A" "B" "C"

350

L48

8.5:1 180 270 4-Speed Manual WR# 3.36 3.08 -
Turbo Hydra-Matic 350* 3.08 - -

350

L82*#

9.0:1 210 255 4-Speed Manual WR 3.55 - -
 4-Speed Manual CR* 3.55 - 3.70
Turbo Hydra-Matic 400* 3.36 - 3.55

*Optional

 # - Not available in California

A - Standard Axle

B - Highway Axle (optional)

C - High-Altitude/Performance Axle (optional)

WR - Wide Ratio ( 2.64:1 low )

CR - Close Ratio ( 2.43:1 low )

Air Conditioning available with all axle ratios except 3.70.

1977 Corvette Powertrain Combinations

Engine Type Compr. Ratio Net H.P. Net Torque Transmission Positraction Axle Ratios(:1)
"A" "B" "C"
350
L48
8.5:1 180 270 4-Speed Man. WR#** 3.36 3.08 -
Turbo Hydra-Matic 350* 3.08 - 3.08

350

L82*#

9.0:1 210 255 4-Speed Man. WR** 3.70 3.55 -
 4-Speed Man. CR*/** 3.70 3.55 3.55
Turbo Hydra-Matic 400* 3.55 - -

*Optional

** With High-Altitude Emission equipment

 # - Not available in California

A - Standard Axle

B - Optional Axle

C - Axle with High-Altitude Emission Equipment (optional)

"A" & "B" - Below 4000 feet altitude in 49 states and all altitudes in California

"C" - Above 4000 feet altitude in all states except California

WR - Wide Ratio ( 2.64:1 low )

CR - Close Ratio ( 2.43:1 low )

Air Conditioning available with all axle ratios except 3.70.

1978 Corvette Powertrain Combinations

Engine Type Net H.P.

4-Speed Man.

2.85:1 low

4-Speed Man.

2.64:1 low

4-Speed Man.

2.43:1 low

Turbo Hydra-Matic 350
Below 4K ft. Abv. 4K
350 L48 Fed 185/175* 3.36:1 N/A N/A 3.08:1 3.55:1
350 L48 Calif 175 N/A N/A N/A 3.55:1 N/A
350 L82** 220 N/A

3.70:1

3.36:1#

3.70:1 3.55:1 N/A

* 175 horsepower rating with High-Altitude Emission Equipment

** Optional L82 engine not available in California; Maryland; Florida; Oregon; Washington; Boston; Chicago; Des Plaines, IL; Barrington, IL; Grand Rapids, MI; and Cook County, IL.

# - 3.70 axle is standard; 3.36 is available highway ratio

N/A - Not Available

Note:  California Emission Equipment required  for registration in California.  In other states, High-Altitude Emission Equipment may be required in areas 4,000 feet or more above sea level.

Air conditioning available with all axle ratios except 3.70.

1979 Corvette Powertrain Combinations

Engine Type Net H.P.

4-Speed Man.

2.85:1 low

4-Speed Man.

2.64:1 low

4-Speed Man.

2.43:1 low

Turbo Hydra-Matic 350 Transmission
350 L48 Fed 195 3.36:1 N/A N/A 3.55:1
350 L48 H/A 195 N/A N/A N/A 3.55:1
350 L48 Calif. 195 N/A N/A N/A 3.55:1
350 L82* 225 N/A

3.70:1

3.36:1#

3.70:1 3.55:1

* Optional L82 engine not available in California

# - 3.70 axle is standard; 3.36 is available Highway ratio

N/A - Not Available

H/A - High-Altitude Emission

Note:  California Emission Equipment required  for registration in California.  In other states, High-Altitude Emission Equipment may be required in areas 4,000 feet or more above sea level.

1980 Corvette Powertrain Combinations

Engine Type Net H.P.

4-Speed Manual

2.88:1 low

Turbo Hydra-Matic 350 Transmission
350 L48 190 3.07:1 3.07:1
305 LG4 Calif. 180 N/A 3.07:1
350 L82* 230 N/A 3.07:1

* Optional L82 engine

N/A - Not Available

1981 Corvette Powertrain Combinations

Engine Type Net H.P.

4-Speed Manual

2.88:1 low

Turbo Hydra-Matic

350 Transmission

350 L81 190 2.72:1 2.87:1

1982 Corvette Powertrain Combinations

Engine Type Net H.P.

Turbo Hydra-Matic

700-R4 Transmission

350 L83 200

2.72:1 Standard

       2.87:1 Collector Edition