RE: Unerstanding Purpose built Verses Conversion
Nobody cares about consumption except the F2C guys.
Loading the engine on the ground to the in-flight RPM allows one to measure and calculate in flight HP. It's not rocket science and there are several ways to measure in-flight RPM accurately these days.
Maximum torque does not always occurs at peak volumetric efficiency. It is dependent on many other factors. After research I have found that such generalities aren't the rule, especially, two stroke engines can be all over the map.
If the compression isn't significantly different between 10-20k why was it a problem for the Enya a few posts ago which wouldn't even be run that fast?
Modern team race diesels are closer to the typical glow engine than any old diesel.
Yes, I think that diesels have the advantage of compensating for elevation quite easily. It's not that one couldn't with a glow engine, just that nobody does.