Socata 235E with O-540 b4b5 problem

Hello

new user of O-540 here.

O-540 engine, 25 hours after OH
New spark plugs. oil - 20w50.
Fuel - 92

The problem in the following:
The temperature on the ground about 20C, cylinder temp on tow 205 C, all towing in max mode.
Towing to the release - ok.
While descending cylinder temperature drops to 130-140 C degrees.
Landing, move throttle to 2000 rpm to fire the spark plugs, all is ok.

At take-off after about 20 seconds of max.rpm start very loud claps.
Also goes vibration - unwind the screws that secure the hood.

They disappear after 30-40 seconds of towing, when the temperature of the cylinder goes up to 200 degrees.

Through trial and error found a way - after landing I change mixture to LOW to raise the exhaust temperature to the maximum, heated cylinders
to 180-190, then claps less and they will disappear faster.
But this takes time, and am not sure that this is good for the rapid heating of the engine.

Can you recommend something?

Some other considerations?