Spit 2a overheating...

[Daliaraptor]

Hey guys

I am getting confused with the behavior of temperature of the spit 2a , maybe somebody can help.
I run the engine slowly to about 40°C Oil 30°C Water. Then i gently speed up, to 2800rpm and full boost (without additional boost) and take off. Cooler fully open.
So now the problem. Sometimes, after the take off, i can fly with full power at 2800rpm and the engine stays below 90°C Oil and 90°C Water (somtimes even lower) with half closed radiator.
But sometimes and more often, the engine is overheading right after the start, even when i throttle the rpm below 2600, set boost behind the red mark and fly faster than 200m/h. The nedle rises and rises.
If i cool the engine down, my plane is now more a glider, the temerature rises so fast over the 100°C Watertemerature when i need power again. its impossible to win a fight, it results always in a engine damage.
Is there a precise work around how to do engine management from take off?
Do i make a mistake, or is this a bug? Because sometimes it just works???

Thanks for help...