Proper G.50 engine info for you here luthier!

[JtD]

While I don't speak Finnish, I would suppose that the engine output is 740 hp at sea level, increasing to 840 hp at 3800m at normal power 790mm. With 890 mm of WE boost, by another 120-130 hp. But above 3800m, the power will go down, that's how the supercharger works.

Kodiak, thanks for uploading the manual. It has similar info on page 100/101. Since it mentions the WEP and is 1939 material, it is safe to assume that during BoB, the power setting was available.