1993-95 CHEVROLET CORVETTE ZR-1

 

PRODUCTION

1993

448

1994

448

1995

448

TOTAL

1,344

 

Sales of the ZR-1 in its last three years of production were low. In fact, production of the LT5 engine by Mercury Marine in Stillwater OK had ceased in November of 1993. It has been said that poor sales of the ZR-1 were due to the lack of distinction between it and the regular Corvette and, in 1993, the improved power output of the regular production Corvette engine. There is obviously some truth in this, however, it's probably more likely that the ZR-1 market was saturated by the end of the 1991 model year and the plain fact is, the ZR-1 was too expensive to sustain sale levels at the same pace as 1990-91.

The heart of the package was the 405hp LT5 engine. Displacing the familiar 350 cubic inches and sharing the same 4.4" bore spacing as the regular small-block Chevrolet V-8, it was nonetheless, a completely different engine.

Using an all aluminum cylinder block and heads, the Lotus Engineering design (along with Chevrolet) featured state-of-the-art four valve per cylinder double overhead cam heads. This made for an engine that produced 375hp. Power went up for the 1993-95 models to 405 through manifolding and valvetrain modifications. The engines themselves were manufactured and assembled by Mercury Marine, in Stillwater OK. The completed engines were then shipped to the Corvette assembly plant at Bowling Green, KY for assembly into specially modified Corvettes.

At a quick glance, it was almost impossible to tell the difference between the ZR-1 and regular Corvettes. Because the ZR-1 used Goodyear P315/535/ZR17 tires mounted on wider 11" rims on the rear, the ZR-1 Corvette is 3" wider and 1" longer than the regular coupe. All ZR-1s had the third stop light mounted above the rear window. A small ZR-1 emblem was located on the right rear fascia below the taillights and a ZR-1 emblem above the side fender vents.

1994 and 1995 ZR-1s got their own distinctive wheels- a five spoke aluminum design. The same wheel, in different finishes was also used on the 1996 Grand Sport and Collector's Edition, Corvettes.

A unique feature of the engine was it's intake system. Each cylinder was fed by two runners-one for each intake valve. During normal driving, each cylinder was fed by one runner.Through the use of a dash controlled switch, whenever additional power was required, the driver could turn the switch allowing the other runner to come into play.

All ZR-1 Corvettes were equipped with the Borg Warner T-6 six-speed manual transmission, the Selective Ride Control system which allowed driver control of the suspension, Bose stereo, air conditioning and basically, every other Corvette option.

SPECIFICATIONS

Wheelbase

96.2"

Track, f/r

59.9"/60.6"

Length

178.5"

Width

73.1"

Height

46.3"

Weight

3,520 lbs.

 

ENGINE

350 c.i. V-8 ZR1

C.R.

11.0:1

Horsepower

405@5800

Torque

385@5200

 

PERFORMANCE

1995 Chevrolet Corvette ZR-1

Engine:

405hp 350 c.i. V-8

Transmission:

Six Speed Manual

Axle ratio:

3.45:1

Weight

3,520

Acceleration

Sec.

0-60 mph

4.5

Standing 1/4 mi.

13.2@110 mph