A modification package designed to increase the cubic inch displacement of a Pontiac 455 engine through an increased stroke length. This often involves a new crankshaft, connecting rods, and pistons engineered to work together to achieve the larger displacement. For instance, a typical package might increase the stroke from the stock 4.21 inches to 4.50 inches, resulting in more overall engine volume.
The enhanced displacement resulting from this type of modification typically leads to increased torque and horsepower output. The greater cylinder volume allows the engine to draw in more air and fuel, enabling more powerful combustion. Historically, enthusiasts seeking greater performance from their Pontiac engines have utilized this method to maximize the engine’s potential while maintaining the original engine architecture. The benefits include improved acceleration, increased towing capacity, and overall enhanced performance.
