Yes, I want to try to stick one together next year if I have time. I will do what Crower did, take a diesel and lower the comp for petrol and use the diesel injector for the water. You need a camshaft of course to suit the 3 cycles, I'm sure Crower Cams have that info
. Need to know when to inject the water on the dead cycle as well. Crower did not take a patent on it leaving it free for the world by the way.
i think you're making more work for yourself than you need to. why start with too high of a compression for example? thats just one more thing to overcome. .. if you plan on shutting off (port) fuel injectors during (di) water injection events you don't need to change the cam just be able to switch between injectors as appropriate. a megasquirt can handle that easily after proper programming (no different than using an existing injector emulator on a gaseous fuel system really) the steam expansion will provide more power than the compression stroke used, then it becomes a question of "is it enough of a return?". back to the days of steam for power output calculation formulae
you would want some sort of demand based steam cycle shutoff of course, and probably a minimum engine temp for operation. .. corrosion of course will be an issue, as would minerals buildup.
" You need a camshaft of course to suit the 3 cycles, I'm sure Crower Cams have that info
you don't honestly expect crower cams to give away currently unused intellectual property do you, i like open source but selling "the fruits of employee and owner labor" is how they make their money. ..
besides, what would you do with the "third cycle" when you aren't using the steam, such as during warmup, have power drains?
edit>> fyi people were adding a 2nd spark plug to their cylinder head long before gdi came about. .. its a common modification on older guzzi's. there's no reason that adding a positive action solenoid valve would be any harder.