For 50/50 you need about 900-1000 of injector, I don't think the .3mm jets are going to get you there. You best Bet is always to test the jetting into a container and see what it is actually spraying.

50/50 is a good starting place. Each application is a bit different. You can run straight water, but it does require a strong ignition, and preferably higher octane fuel as standard.