Dear Oleg,
many virtual pilots look forward to a improved and more realistic engine management. I understand that this is not a easy task. The implementation is one thing, but getting the refereces is another exhausting and expensive task. I want to help you with the later.
I've scanned and mailed you
Operational Notes for Pilots on Merlin II and III a month ago. This is a 18 pages booklet about operational handling of Merlin II and III engine. You propably remember this:
You really liked it. And this motivated me to prepare a even better reference on this subject:
Air Publication 1590B Volume I, 2nd Edition October 1938
Merlin II and III Aero-Engines
Air Ministry
Reprinted October, 1939
In this over 180 pages manual are also amendments included until November, 1940. It covers all possible variants: 87 octane/100 octane fuel, wooden fixed/Two-position variable/constant speed propeller.
You can download a small preview including the content and the introduction here:
http://www.41squadron.org/test/AP1590B_preview.pdf
Chapter 7 and Chapter 11 should be most interesting.
I tried to contact you about this several times by email in the last 2 weeks, but you didn't respond and didn't download it (at least my server didn't log the download). Of course I do understand that you are a busy man. Please tell me if you are interested in this manual or not. If you are interested I will give you the necessary information to download it.
Best Regards