Starting in 1991, the 454 was updated to the new Gen V block, crankshaft and heads. This engine was rated 230 net horsepower, 380 ft lbs net of torque and was discontinued after 1995, GM came out with the 1996 Vortec 7400.
The 1970s versions of the Chevrolet 454 were the most powerful, with the LS5 producing around 360 hp and the LS6 around 450 hp.
Here is a pristine Gen V 454 from a 1990 Chevrolet 454SS pickup. Gen V, introduced in 1991, included a superior one-piece rear main seal, new oil passages closer to the cam and all blocks received Four-bolt mains.
Big Block, Big Truck
Under the hood, Chevrolet simply diverted a powertrain from its heavy-duty pickup assembly line, a 454 cubic-inch V-8 rated at 230 hp and A whopping 385 lb-ft of torque.
The 454 SS was released in late 1989 as a 1990 model, right in the middle of the fourth generation (GMT400) trucks.
In general, a properly tuned production automobile engine produces 1.0 to 1.5 horsepower per cubic inch. Where a given engine falls depends on many factors, so we use 1.3 hp per cubic inch as the average. This means that a 454 can support almost 600 hp (454 x 1.3 = 590.2). In fact, many do.
Surprisingly, the 454 delivered an impressive 330 horsepower and 475 pound-feet of torque. Of course, the truck-based 454s were trimmed for torque, so coming close to 500 pound-feet wasn’t much of a surprise. But as with any standard engine, there was still tons of power to squeeze out.
The 454 Big Block is a very good engine if you are looking for something that can put out a lot of power and will fit in many classic cars and trucks. This is a classic Chevrolet engine that produces tremendous power straight from the factory. If you upgrade it, you can get even more out of it.
The facelifted 454 (now known as the Vortec 7400) was good for a whopping 290 hp and 410 lb-ft of torque and was offered through 2001 (the final year for commercial and recreational use).
A: The average price of a Chevrolet 454 SS – 4th generation is $26,386.
With an acceleration from 0 to 60 mph in just 7.2 seconds, the Chevy Muscle Truck was absolutely unique. The engine pulls best at low revs, so the quarter mile time wasn’t that impressive at 15.8 seconds.
454 runs on the right oil 200,000.