This engine modification involves increasing the internal displacement of a Big Block Chevrolet (BBC) 454 cubic inch engine through the use of a crankshaft with a longer stroke. This alteration directly affects the distance the pistons travel within the cylinders. The result is a larger swept volume, thereby increasing the engine’s potential to produce more power and torque.
The enhanced displacement translates to improved low-end torque and overall engine performance. Historically, this method of engine building has been a popular way to extract additional power from existing engine platforms, providing a cost-effective alternative to purchasing a completely new engine. The increased torque is particularly beneficial in applications requiring significant pulling power, such as trucks or performance vehicles intended for street or track use.