The Gauge set used is with a readout for gasoline.
The numbers indicate the amount (mass) of air against the amount of gasoline (mass)
Where as 14,4 to 1 stands for Lambda 1 = complete combustion with no excess air.
the lower number on the readout means: richer
The higher number means: leaner
Notice in the above clip, i point to the gauge, that if spray water in the nozzle, the AFR readout goes towards more rich.
Hence the water turns into energy
Also, on the bezel, you’l see a led moving around, for those that love the analog readout , it runs from green left to red richt over orange in the middle.
Next time i will try to install it with Lambda readout where 1 stands for complete combustion, more then 1 stands for lean and less then one stands for rich.
Testing to find at what level i can get the optimum power output at what settings.
PS: My work is not intended to tell people how to do things right. Its only a way to share some knowledge/experience that others might implement in their builds for their own benefits.