I think that we need to differentiate between non-intercooled engines and well-intercooled ones.
Ages ago I had a primitive W.I. setup on a non-intercooled turbo bike (before the compressor) and the engine would feel extremely happy no matter how much water I would inject (suck out of the nozzle more like)
I'm not sure that this would be the case in a well-intercooled setup
The 1945 documents all refer to non-intercooled engines, don't they?
PS
This is a very interesting set of threads, a far cry from the usual rubbish and slagging matches on other automotive forums.
Nice one