Max RPM

Stroke: Inches

Result: Max RPM

Mean Piston Speed: Feet per Minute

Stock component engines: cast iron crankshaft, stock connecting rods, stock cast pistons

Heavy duty engines: forged or nodular iron crankshaft, shot peened connecting rods, forged pistons

Racing/Performance engines: forged crankshaft, high strength alloy rods, high strength alloy pistons