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C4 Corvette

C4 Corvette
 
After a 14 year run, the longest of any Corvette body style, the much anticipated release of a newly designed Corvette was on the brink of becoming a reality. The C4 Corvette was supposed to be released in 1983, and it was but as the 1984 model year, this was due to pushed back production dates and the fact that the C4 Corvette met all Government standards for the 1984 product year. The C4 was almost a complete redesign from the previous generation of Corvettes with a specific goal in mind, handling. This new Corvette featured some drastic changes that in the end received acclaim for being the best handling car in the world at the time of its release.

The big change that helped reach this goal was the switch to a unit-body that made the chassis much stiffer allowing for the outstanding handling characteristics. Another beneficiary of this was that the drivetrain tunnel was used to house not only the transmission but the exhaust piping as well. This allowed the Corvettes to lower its floor while retaining a similar ride height to the C3 Corvettes and hence the C4 Corvettes have since been known for there entrance and exit to be know as falling in and climbing out. Another advantage of this redesign was that it lowered the Corvettes center of gravity and improved its aerodynamics, aiding the Corvette to world renown.

Over the 12 year stretch that the C4 Corvette hailed as Chevrolet’s flagship sports car there were many cosmetic changes that occurred during its lifespan, but more notably are the engine and transmission changes that made this car not only known for its great handling but also a return to being a powerhouse and the king of the hill from the lull of high horse power torque machines during the late 70’s.

The C4 Corvettes had a total of 6 different engine options during its 12 year stint each progressively bringing more power to the pedal and bigger grins on Corvette owners across the country. The only motor available during the 1984 production year was the L83 Crossfire Fuel Injection Motor, which was one of the only carry over items from the 1982 production year. This motor offered 205hp at 4200rpms and 290 ft/tq at 2800rpms, sure to get you off the line in a hurry but there was room for improvement which happened the following year with the L98 motor.

The L98 motor featured Tuned Port Injection which was Chevrolets version of individual fuel injection for each cylinder. This helped to bring the Corvettes HP up to 230 and the torque up to 330 ft/lbs. This was the base motor for all Corvettes from 1984 to 1991 with power increasing from 230hp to 240hp in 1987 and the torque jumped to 345 ft/lbs.

The L98 was also the base motor that was used to create one of the fastest Corvettes and was available only by special RPO B2K with final assembly taking place offsite of Chevrolets’ facilities at Callaway in Old Lyme, Connecticut before being delivered to its respective dealership. The Callaway Twin Turbo Corvette started production in 1987 and ran till 1991, with a total of 497 B2K Corvettes being sold. The early model B2K’s pumped out 345hp and 465 ft/lbs and increased to 405hp and 582 ft/lbs of torque its final year of production. The B2K Callaway’s main competition was coming directly from the Bowling Green Plant in Kentucky and was the Corvette ZR-1.

The ZR-1 Corvette churned out numbers that rivaled the twin turbo Callaway, but was using a naturally aspirated LT-5 motor designed by Lotus of England with manufacturing taken care of in Stillwater, OK by Mercury Marine. During its 5 years reign as “King of the Hill” a total of 6,939 ZR-1's were produced. The naturally aspirated LT-5 motor produced 405hp at 5600 RPM's and 385 ft/lbs of torque at the same RPM's. This helped the ZR-1 to pull hard all the way up to its top speed of of near 180 mph!

The other two motors weren't introducted until the last few years of the C4 production. The First being the LT1 that replaced the L98 as the base Corvettes motor in 1992 and finished out the production of C4's in 1996. Improvements came in the form of more horse power, with numbers jumping up to 300Hp at 5000 rpm's but the torque droped a bit to 330 ft/lbs of torque from 345 ft/lbs. Overall it produced quicker acceleration out of the box and featured the great handeling capabilites associated with Corvettes.

Lastly is the LT4 Motor that was found in the Grand Sport Corvettes produced in 1996 that commemorated the end of the C4's production run that came to an end on June 21st 1996. The LT4 motor wasnt as powerful as the LT5 but could still blast off a 13 sec. quarter mile from its 330hp motor. With only 1,000 of these fine automobiles made they are one to be saught after as they feature a unique color scheme of admiral blue and a set of red hash marks over the front drivers side wheel well. The LT4 motor was also an optional motor for any other Corvette that came with the manual 6 speed transmission.

  • Motor and Displacement
  • 5.7L V8 L83 Crossfire Fuel Injection Motor


  • Horsepower
  • 205 HP @ 4200 RPM
  • Torque
  • 290 FT/LBs of TQ @ 2800 RPM
  • 0-60 Time
  • 0-60 in 7 Seconds


  • 1/4 Mile Time
  • ¼ mile in 15.5 Seconds at 88 MPH
  • Engine ID Code
  • 8




View Image of Motor



  • Motor and Displacement
  • 5.7L V8 L98 Tuned Port Injection Motor
  • Horsepower


  • 230 HP @ 4000 RPM
  • Torque
  • 330 FT/LBs of TQ @ 3200 RPM
  • 0-60 Time
  • 0-60 in 5.7 Seconds
  • 1/4 Mile Time


  • ¼ mile in 14.4 Seconds at 95 MPH
  • Engine ID Code
  • 8


View Image of Motor


  • Motor and Displacement
  • 5.7L V8 T-T L98 TPI Motor by Callaway


  • Horsepower
  • 345HP
  • Torque
  • 465 FT/LBs of TQ
  • RPO Code:
  • B2K




View Image of Motor




  • Motor and Displacement
  • 5.7L V8 LT5 Tuned Port Injection Motor
  • Horsepower
  • 375 HP @ 5800 RPM
  • Torque
  • 370 FT/LBs of TQ @ 5600 RPM


  • 0-60 Time
  • 0-60 in 4.9 Seconds
  • 1/4 Mile Time
  • ¼ mile in 13.4 Seconds
  • Engine ID Code
  • J




View Image of Motor


  • Motor and Displacement
  • 5.7L V8 LT1 Tuned Port Injection Motor
  • Horsepower


  • 300 HP @ 5000 RPM
  • Torque
  • 330 FT/LBs of TQ @ 4000 RPM
  • 0-60 Time
  • 0-60 in 5.1 Seconds
  • 1/4 Mile Time


  • ¼ mile in 15.1 Seconds at 93 MPH
  • Engine ID Code
  • P


View Image of Motor


  • Motor and Displacement
  • 5.7L V8 LT4 Multiport Fuel Injection Motor
  • Horsepower
  • 330 HP @ 5800 RPM


  • Torque
  • 340 FT/LBs of TQ @ 4500 RPM
  • 0-60 Time
  • 0-60 in 4.9 Seconds
  • 1/4 Mile Time
  • ¼ mile in 13.4 Seconds


  • Engine ID Code
  • 5


View Image of Motor
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