@273 the more efficient(better designed) a port is, the higher a velocity it can operate at. High velocity is "free" supercharging, augmented by complimentery runners. They actually work better with smaller valves because more curtain area is used, which allows for less shrouding as well. Poorer ports tend to work better with larger valves deshrouded because they need as much low-mid lift flow as possible to crutch poorer high velocity flows, most OE ports are poor to decent. Very few are great, but some can be modded to be very good/great, so that's where it stands.
