Sorry to keep beating this, but my point is that the motor ONLY knows the events, IVO, IVC, EVC, EVO, overlap, the numbers used for duration and LSA are just the tools and method to get to the events. Yes, by moving the intake closing point I reduced the duration, but the motor doesn't care what the duration is, only when I opened and closed the valve. The intake opening point determines how soon before TDC the flow starts, the intake closing point determines how long you left the valve open for cylinder filling and how long the piston has to compress the mixture. The exhaust closing determines the length of the overlap period, which cleans the cylinder of residual gasses and readies it for a new charge, the exhaust opening point determines when the blowdown of the cylinder starts to push the exhaust gasses out the exhaust port.