Engine Formulas

Piston speed: P = S x R / 6

P = Piston speed (feet per minute) S = Stroke (inches) R = Engine speed (RPM) 6 is constant

Example: H23vtec, 95mm (3.74") stroke, 5000RPM

P = 3.74 x 5000 / 6

Answer = 3117 feet per minute

__-