Water Methanol MW50

[Bruce Tuncks]

Ian, you are obviously correct here, but how would you implement that idea on a Jabiru? Ideally, when you stopped running the engine, there should be no further actions needed, like opening valves on pipes.

[lee-wave]

8 hours ago, facthunter said:

Your % is wrong. Take the equation for combustion and use the atomic weighs for each ingredient and you'll find there's more H2O mass than Fuel Mass.  Your ADDED water meth will be less than the water made and if it's only injected at full throttle and the rings seal as they should you should have no real issues much above the normal. Oil can go  cloudy without water being injected if the engine OIL runs too cold. Nev

My comment mentioned the % ingredients expelled in the exhaust emissions,  not the in the combustion process.   Gases / fluids coming out of the exhaust is about 10-15% water and approximately the same % in CO2. The rest of the gas is N2.   You are correct in the Atomic weight calculations.  Without going through complex calculations and dependent on the humidity 1 gallon of petrol will produce approximately 1 gallon of H20 when burnt in an internal combustion engine.  That is why we see water coming out of the exhaust pipe of our cars.. more so on humid days.  

 

As with any motor it is the water or condensates that remain behind in the crankcase that will emulsify into the oil. This water + oxygen is main contributor to corrosion in any internal combustion motor if left extended periods of time.

[Ian]

18 hours ago, Bruce Tuncks said:

Ideally, when you stopped running the engine, there should be no further actions needed, like opening valves on pipes.

It's a manual process which is a bit unwieldy. The following article gives a bit of an overview of the principle and operation of a couple of commercial kits.

https://www.aviationconsumer.com/maintenance/engine-dehydrators-engine-saver-prevails/

There's also the DIY approach

https://www.pilotsofamerica.com/community/threads/engine-dehumidifier-diy.115754/

 

It's not an elegant solution by any means and your mileage may vary.