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So, the Atkinson cycle engine is ~23% more efficient via elongating the "burn" cycle, more complete combustion of the A/F charge before entering the exhaust manifold, yet there is still enough energy in the "flow" of the exhaust gasses to spin a turbo.
NOT...!!
There is a pretty radical difference between air pressure waves that are simply created via alternating flow restriction and actual alternating reversal of flow.
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