Corvette Forum : DigitalCorvettes.com Corvette Forums banner

1 - 10 of 10 Posts

·
DC Crew
Joined
·
53,209 Posts
Discussion Starter #1
All about C4's.... vrrrrrooom

The 1984-1996 Corvette is referred to as the C4 or "Fourth Generation" Corvette. There were no 1983 production year Corvettes sold to the public.

1984 - This year saw an almost complete redesign of the Corvette. The '84 production run started in March 1983. Top engine was the 350/205 h.p. option. Top selling color was bright red.

1985 - Last offered in 1965, "true" tuned-port fuel injection returned to the Corvette. Top horsepower was increased to 230.

1986 - For the first time since 1975 a convertible was offered again. Corvette "Paced" the Indy 500, and all '86 covertibles were considered Indy Pace Car Replicas, the second year Corvette produced a Pace Car replica. Anti-lock brakes bacame standard on the Corvette. Four coupes were sold with a Copper Metallic paint (code 66). Fifty "Malcolm Konner Commemorative Edition" Corvettes were produced (RPO 4001ZA.)

1987 - Top engine selection was 240 h.p. The Callaway Twin-Turbo engine option was not factory installed, but could be ordered from participating Chevrolet dealers (RPO B2K.) 184 were ordered.

1988 - A thirty-fifth anniversary edition package could be ordered on Coupes. The '88 standard wheel was changed to 16x8.5 (used for only that one year.)

1989 - A six-speed transmission was introduced. Standard wheel was 1988's optional 17x9.5 twelve-slot wheel. Eighty-four ZR-1 Corvettes were built, but not sold to the public.

1990 - Big news was the ZR-1 performance option. The 1990 ZR-1, not to be confused with the 1970 ZR1 option, ZR-1 utilized the LT5 engine assembled by Mercury Marine, producing 375 h.p. and costing an extra $27,000. The ZR-1 also included a number of unique body panels. 3,049 ZR-1's were produced. All 1990 Corvettes utilized a more efficient sloped radiator design. The Competition Yellow paint option (53) was discontinued in early 1990 due to pigment problems in the sunlight.

1991 - All '91 Corvettes had redesigned front ends, new side panel louvers and newly redesigned rear exteriors, similar to the '90 ZR-1s. Newly designed wheels were also introduced. Mufflers were revised and included less back pressure.

1992 - Base engine was the LT1, a newly redesigned small-block. Mobile 1 Synthetic oil was filled at the factory. Improved weatherstripping was used. The 1-millionth Corvette, a white convertible, was produced.

1993 - A 40th Anniversary package was optional with all models. The package included a Ruby Red metallic exterior. All leather seats in 1993 had "40th" anniversary in the headrest area. Horsepower in the ZR-1 increased to 405. The passive keyless entry system was introduced. Front wheels were decreased in size to 17x8.5. The ZR-1 could run a top speed of 179 mph. 6,749 40th Anniversary Ruby Red cars were ordered. 448 ZR-1s were produced.

1994 - The ZR-1s received a new 5-spoke wheel design. This wheel could not be ordered on other models. The four-speed automatic transmission was designed using electronic controls. You now had to use the brake pedal before shifting from "park." AC systems were revised to use R-134A refrigerant, a non ozone depleting CFC design. Goodyear Extended Mobility Tires (EMTs) "Run Flats" were an option. Admiral Blue and Copper Metallic were new color options.

1995 - Front fender air vents were redesigned to a "gill" shape. Corvette "paced" the Indy 500 race, and a Dark Purple and White convertible Indy 500 Pace Car Replica was offered (RPO Z4Z) 527 were produced, the third Corvette Indy 500 Pace Car replica. This was the last year for the ZR-1. The ZR-1 option now added $31,258 to the base price of a Corvette. A '95 convertible ZR-1 with Auxiliary Hardtop and Adjustable Suspension package cost the purchaser about $80,000. Total ZR-1s produced 1990-95 was 6,939.

1996 - New optional 350 c.i. LT4 engine, used only in 1996. LT4 equipped cars had an 8000 RPM tachometer. LT1 engined cars used a 6000 RPM tachometer. The "Grand Sport" option included the LT4 engine and special Admiral Blue paint with white center stripe. They also included the 5-spoke ZR-1 wheels, painted black. Corvettes with the Grand Sport option used separate serial numbers. A "Collector Edition" option included Sebring Silver paint and special trim. Traditionally, Red is the top selling exterior color, but in '96, Sebring Silver Metallic was the top seller. This was the last C4.

Specifications/Numbers Produced:

1983: 47 Coupes only (Vin's were made but not sold. 1 confirmed still in existence)

1983: 28,174 Coupes only (Produced in '83, sold as '84 MY)

1984: 23,373 Coupes only (51,547 total production)

1985: 39,729 Coupes only

1986: 35,109 Coupes: 27,794 Convts: 7,315

1987: 30,632 Coupes: 20,007 Convts: 10,625

1988: 22,789 Coupes: 15,382 Convts: 7,407

1989: 26,412 Coupes: 16,663 Convts: 9,749

1990: 23,646 Coupes: 16,016 Convts: 7,630

1991: 20,639 Coupes: 14,967 Convts: 5,672

1992: 20,479 Coupes: 14,604 Convts: 5,875

1993: 21,590 Coupes: 15,898 Convts: 5,692

1994: 23,330 Coupes: 17,984 Convts: 5,346

1995: 20,742 Coupes: 15,771 Convts: 4,971

1996: 21,536 Coupes: 17,167 Convts: 4,369
 

·
Official Forklift Driver
Joined
·
7,068 Posts
Here are some more facts about the 1987.

·Friction reduction from roller valve lifters (new for 1987) resulted in a power increase to 240hp, up 5hp from 1986's aluminum-head engines and totque twisted up again to a stump pulling 345 lbs/ft. Rocker arm covers recieved raised rails to forestall oil leaks and spark plugs moved closer to the center of each combustion chamber.

·Center sections and radial slots of 1987 wheels were painted argent gray. 1986 wheel centers were not painted. Centers and radial slots for 1984 and 1985 were painted black.

·Convertibles and early coupes had outside mirror air deflectors.

·Chevrolet planned an RPO UJ6 low tire pressure indicator option, but the $325 option was on constraint during 1987 due to false signaling problems. However, Chevrolet records show forty-six units sold.

·The RPO Z52 package was refined to include structural enhancements developed for the convertible, and a finned power steering fluid cooler.

·A new RPO Z52 "sport" handling package combined elements of Z51 with the softer suspension of base models. RPO Z52 included the radiator boost fan, Blistein shock absorbers, engine oil cooler, heavy-duty radiator, l6x9.5-inch wheels, faster 13:1 steering ratio, larger front stabilizer bar (except early production), and the convertible-inspired structural improvements for coupes. Z52 was available with coupes or convertibles, automatic or manual transmissions.

·The overdrive-engage light was moved from the center-dash area (1984-86) to an easier-to-view location within the 1987 tach display.

·The Callaway Twin-Turbo engine package introduced in 1987 was not a factory-installed option, but could be ordered through participating Chevrolet dealers as RPO B2K. Fully assembled Corvettes were shipped from the Bowling Green Corvette plant to Callaway Engineering in Old Lyme, Connecticut., for engine and other modifications. The 1987 Callaway had ratings of 345hp and 465 lbs.-ft torque, and reached a top speed of 177.9 mph with .60 overdrive gearing. The first four 1987 Callaways used replacement LFS (truck) shortblocks, but subsequent cars had reworked production Corvette engines. All 1987 Callaways had manual transmissions and none were certified for California sale. Of 184 twin-turbos built in 1987, 121 were coupes, 63 were convertibles.

·Electronic air conditioning control (RPO C68) became an available option for coupes and convertibles in 1987; in 1986, it was coupe-only.

·ABS became standard, a sensible feature for a car that could top 150 mph.

·Major componenets get ID marks to twart thieves.

·New 1987 convenience options included and illuminated vanity mirror (D74) for the driver's visor, and a passenger-side power seat base (AC 1). Twin remote heated mirrors became available for convertibles as RPO DL8. The heated mirrors were included with the heated rear window in the RPO Z6A defogger option for coupes.
 

·
Registered
Joined
·
284 Posts
It's customary to credit the source quoted, in this instance Michael Antonick's informative "Corvette Black Book". Please give credit where it is due.
 

·
DC Crew
Joined
·
2,988 Posts
"A '95 convertible ZR-1 with Auxiliary Hardtop and Adjustable Suspension package cost the purchaser about $80,000. Total ZR-1s produced 1990-95 was 6,939. "
:huh: Typo maybe?
 

·
"a title"
Joined
·
790 Posts
I still find it amazing that 15 years ago, a ZR1 cost almost double as much as a C6 does today that makes about the same power and has a higher top end. But then again, 405 hp back then was godly. My, how we have come a long way!

Paul
 

·
Registered
Joined
·
3 Posts
I still find it amazing that 15 years ago, a ZR1 cost almost double as much as a C6 does today that makes about the same power and has a higher top end. But then again, 405 hp back then was godly. My, how we have come a long way!

Paul

The LT5 is an exotic engine. The ZR-1 package didn't add but $31k, doubling the base price. I haven't seen any new $35k C6's. The LT5 is far advanced for it's time and now. Chevy is still stuck with push rods and having to SC it's engines to match what a well tuned LT5 can do. I enjoy having that power key and reving to 7k. We have advanced but have bypassed technology that worked.
 
1 - 10 of 10 Posts
Top