He is not taking into account the lower manifold vacuum due to the 2 active cylinders working harder to keep up, the engine would be at full throttle twice as long with half the cylinders. I would go as far to say that under load it would have half the manifold vacuum and thus half the pumping loss. Of course if the valves were deactivated then it would have half the vacuum and half the displacement for 1/4 the pumping loss of a full engine.
Quote:
Originally Posted by Weather Spotter
so all that comes down to, without closing the valves its not worth it, the pumping losses will negate most (all) of the gas savings.
Bummer!
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