Specifications for a 1989 Chevy 350

by Steve Johnson
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The 1989 Chevy 350 engine was part of a family of small-block V8 engines that was produced from 1955 to 2002. The 1989 Chevy 350 was a part of the engine family’s second generation, which was produced from 1962 until 1998. In 1989, the Corvette, the G30 van, and the Suburban has this engine. Because of the 350’s versatility in performance, it was installed in vehicles that ranged from a sport coupe to a full size van.


The 1989 Chevy 350 engine falls under the L98 variants of the Chevy 350 engine. The L98 was introduced to the market in 1985 with a tuned-port injection (TPI). The TPI improved the previous 350 engine’s performance up to 30 percent, improving its maximum power output that included torque, horsepower, and carburetion. Midway into 1986 the cylinders were replaced with aluminum heads, and this was used until the L98 was discontinued in 1992. In 1987 its valvetrain was also improved, adding another 20 percent increase on its overall performance. The L98 variant was finally discontinued in 1989, and paved the way for other engines that include the 262 and the 305 engines. Although modified, these engines are just different variations of the 350 L98 engine.

Engine Performance

The Chevy L98 350 was a 5.7 liter, V8 engine with a displacement of 350 cubic inches. It was an internal combustion engine made with eight cylinders. It had a bore and stroke of 4-by-3.48 inches, and a compression ratio of 9.5 to 1. Equipped on a Corvette, the 350 is capable of producing 240 horsepower at 4,000 RPM, and 345 pound-feet of torque at 3,200 RPM. When equipped with a twin turbo charger, the L98 on a 1989 Corvette produced an output of 345 horsepower and 465 pound-feet of torque.

Remanufactured Engines, Parts and Pricing

Various parts, replacements and aftermarket modifications are widely available for the 1989 Chevy 350. Some companies even produce remanufactured engine blocks that follow the same specifications of the original 1989 350 variant. As of 2010 a remanufactured 1989 350 engine can cost from $1,000 to $1,500, while an engine rebuild kit costs around $530.

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