1966 Chevrolet Corvette
For the 1966 Corvette, the big-block V-8 came in two forms: 390 hp (290 kW) on 10.25:1 compression, and 425 bhp via 11:1 compression, larger intake valves, a bigger Holley four-barrel carburetor on an aluminum manifold, mechanical lifters, and four- instead of two-hole main bearing caps.
Though it had no more horsepower than the previous high-compression 396, the 427 cu in (7,000 cc), 430 hp (320 kW) V8 packed a lot more torque – 460 lb⋅ft (620 N⋅m) vs. 415 lb⋅ft (563 N⋅m).
The 1966 model's frontal appearance was mildly altered with an eggcrate grille insert to replace the previous horizontal bars, and the coupe lost its roof-mounted extractor vents, which had proven inefficient. Corvettes also received an emblem in the corner of the hood for 1966.