"MW-50 Water-Methanol Injection
MW-50 (MethanolWasser 50) is a 50-50 mixture of methanol and water sprayed into the Fw 190 D-9's supercharger of, allowing the use of increased boost pressures.
The MW-50 tank has a capacity of 115 liters (85 kg).
The primary effect of the mixture spray is its anti-detonant effect, which is how the increase in boost pressure is achieved.
The secondary effect of the mixture spray is cooling of the engine.
While the primary boost-increasing effects deteriorate with altitude, the secondary cooling effects are still noticeable. Therefore, the MW-50 system can be used to cool down the engine at all altitudes in an event of an emergency.
The boost provided by the MW-50 begins to decrease in power at altitudes above 6,000 meters.
The boost increase provided by MW 50 can be described with the word "incredible".
Turning the system on immediately increases engine power by almost 100 HP due to the fact that a cooler engine can pull in more air. At the same time, turning on the MW-50 enables much higher supercharger boost levels. In optimal conditions, both effects combined increase engine power by a whopping 350…400 HP."
