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Feb27-11, 09:47 AM
The one which stuck in my mind was taking a 5.0L naturally aspirated V8 automotive gasoline engine, and replacing it with a single stage turbocharged 2.0L I4. While it's easy to match peak power and peak torque, the interesting bit was that they'd matched the entire torque curve of the V8.
Some of the case studies we saw using twin stage turbocharging were incredible (>35 bar BMEP, <230g/kWh).
That is incredible. I wouldn't have thought it possible to match the full curve with a single stage. It'd be interesting to see how it performs over a lifetime though, the increased loading must be huge.