Valach VM-210 equipped with 2-into-1 Y-header and single canister from Toni Clark in Germany.
Fuel: 25:1 run-in mix.
Elevation: 250 ft.
Temperature: 5-10 degrees C.
Less than 10 liters through the engine at this point.

Fiala 34x16x2: 4.800 on the ground.
Rather noisy in the air due to prop ripping. Good thrust and decent speed.

Menz 32x18x2: 4.600 on the ground, about 200 more than my Moki 250.
Very quiet in the air, only the engine is heard even when going full throttle. Slightly lower climb performance but about 5-10 km/h higher top speed.