This is from the 1952 SAE Transactions.
Development of the R3350 Turbo Compound
Engine.

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This power recovery heat balance chart knocked me out of my chair.
I had NO IDEA.... NONE WHAT SO EVER, prior to now, so much energy
was wasted by the exhaust valves in a piston engine turbo compounds.

Need I mention yet again THE WANKEL ROTARY HAS NO BLEEDING
EXHAUST VALVES!!!.

More evidence we will eventually get more than a 20%
efficiency improvement with a turbo compound rotary.

I am not making this stuff up folks.

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Am I the only person on here that understands the significance of
twice as much energy available in the exhaust to power a turbine
due to the elimination of the exhaust valve losses? :)

How about an internal combustion rotary engine that is 36%
more efficient?

In theory, with a variable ratio turbine speed reduction
unit, we could be looking at a 20 to 30% reduction in the
fuel used for transportation world wide. With
oil at $70 a barrel how much money is that?

It is not me dreaming these things up. The numbers are right
here folks. Staring us in the face. The 1952 SAE Transactions
book at the Cal Tech library had a 1 mm coating of dust on it.
Probably one of only several dozen copies left in the world.

Paul Lamar ...No rotor no motor.

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