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Corvette ZR1 5.7 L (350 cu in) LT5 V8 in a C4 ZR1. General Motors acquired Group Lotus, a UK based engineering consultant and performance car manufacturing firm, during 1986. The Corvette division approached Lotus with the idea of developing the world's fastest production car, to be based on the C4 generation of the Corvette.
ZR1, (or ZR-1), is a designation that has been used on several different generational models of the Chevrolet Corvette. For the 3rd generation (C3) , the ZR1 & ZR2 were special engine packages. Only 53 of these packages were optioned during the 1970 to 1972 model years.
The C4 ZR1 ran from 1990 thru 1995 model years. In 1991, all Corvettes received updates to the body, interior, and wheels. The convex rear fascia that set the 1990 ZR-1 apart from the base model was included on L98 Corvettes, making the styling of the expensive ZR-1 nearly identical to that of the base cars.
Chevrolet's engineers pushed the boundaries of engine architecture with the ZR1, squeezing 1,064 horsepower and 828 lb-ft of torque from the 5.5-liter twin-turbocharged V8. New Corvette ZR1 ...
The 1982 L83 was again the only Corvette engine, producing 200 hp (149 kW) and 285 lb⋅ft (386 N⋅m) of torque from 9.0:1 compression. Since GM did not assign a 1983 model year to production Corvettes, there was no L83 for 1983. [22] This was also the only engine on the 1984 Corvette, at 205 hp (153 kW) and 290 lb⋅ft (393 N⋅m) of torque.
There are a lot of differences between the C8 Corvette ZR1's LT7 engine and the Z06's LT6, even if the two dual-cam V-8s share a few key components. 2025 Chevy Corvette ZR1's V-8 Is More Than a ...
To counter the ZR-1, for the 1991 model year, Callaway was able to bring up the output of the B2K option up to 402 hp (300 kW) and 582 lb⋅ft (789 N⋅m) of torque. 1991 would be the last year of the L98 engine which was the base engine of the Callaway Twin Turbo Corvette. There were 62 ordered in this last year of Twin Turbo production.
The engine had MPFI (multi-port fuel injection), which gave slightly more power and better fuel economy, and two valves per cylinder. The engine had a bore and stroke of 4 + 1 ⁄ 4 in × 4 in (108.0 mm × 101.6 mm), producing 290 hp (216 kW) at 4000 rpm and 410 lb⋅ft (556 N⋅m) at 3200 rpm. It was used by Mercury Marine, named the ...