Quick facts: Age (19) / Mech. Eng. Sophomore / Automotive & Physics Lover In an attempt to design and construct a new less restrictive engine intake system i've run into a number of questions I am not yet able to answer. Main Goal: To produce a new intake system and associated plumbing associated with it. Intake in Question: Calculations: Minimum Intake Width: 3'' X 3'' (9 Sq. Inches) Displacement: 2.4 liters (~1.2 liter volume intake per revolution assuming counterbalanced pistons) RPM: 6000 Volume / Min: (1.2 X 6000) 7200 liters / min Cubic Feet / Min: (0.0353147 cubic feet / liter) 0.0353147 X 7200 = 254 cubic feet / min Cubic Feet / Sec: 4.24 Feet / Sec Through Intake: 4.24 / (0.25' * 0.25') = 67.8 ft / sec Questions: 1 . Correct me if my math or assumptions are wrong, but 67 ft/s seems like an awfully turbulent speed for such a small pipe and if widened, would decrease resistance / parasitic drag, no? 2. Would applying a dry teflon grease to the new piping decrease turbulence significantly? 3. Should the intake be as wide as reasonably possibly or am I ignorant to some physics going on here? (ie. Pulse Resonance, intake velocity leading to turbulent swirling in the piston draw, etc.) ( I feel that the air intake rate into the piston would be so quick that any initial speed would be negligible.) Again, suggestions / help / criticism are welcome!