How to fly a Spit 1a correctly!?

[Daliaraptor]

@reflected

Thanks so far!!!
I made a testflight and get more power out of the Spit with more RPM. Ive always thougt that 2850 RPM and more is too high anyway.
But with those RPM i have to open the radiator fully all the time, even then, the engine temperatur is rising slowly to the 100° mark. Especialy in high altitude.
Should i change Mixture and decrease RPM for a while for cool down? When i just decrease the RPM with rich mixture then the engine get struggling below 2600 RPM!

Thanks anyway for support.