Get the most out of the bf109

[Geronimo989]

Thank you Blackdog for taking your time to explain this so well.
I have a couple of questions:
If you wanna achieve highest performance out of your 109 (not worrying about fuel or engine lifespan etc) Do you keep the full throttle and adjust the RPM with your pitch?
What is the maximum IAS you can get out of 109 in level flight at 1500m? I cant get over about 460 km/h (full throttle, about 2100 RPM) even though I was sure that in IL-2 I could get 500+ out of it...