Quote:
Originally Posted by aker63
Have you given up on the project? Do you think with the right pool of people it could be made safe? What other challenges did you face?
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I don't understand why you can't just put a flame arrestor/filter (like on all camping stoves or anything that uses propane) right after the carburater and not worry about exploding yourself.
I read this on another site and thought it'd be fun to try, just not sure what a good container to use is, I'm thinking maybe a hacked up 1 gallon gas can and I'm not sure where to get the elephant diapers.
Plus as cool as it sounds to have the air 'wick' the fuel directly, I would think proximity of moving air to level of fuel and area of 'wick' exposed to air (like amount of wicking material used) would make a difference in how much a given amount of air absorbs as well and tuning that would be a nightmare.
As for wrapping the fuel line around the exhaust, I would think this would vapor lock for sure, even in FI, the injector can't inject (or meter anyway) fuel vapor. The fuel is only at 45psi or so, that's 3 atmospheres and doesn't affect boiling temp all that much compared to the temperature at the headers. The things I've read suggest wrapping around the coolant lines instead, then you get a good 200F or so which helps but isn't enough to vaporize anything and you also cool the engine a bit.
Also what I've already REALLY wanted to try was to take a propane metering device (like from an LPG conversion kit) and have that meter from a sealed container (like an old soup can) that was welded/soldered/glued to the exhaust headers and fed directly somehow, maybe with an old fuel injector wired to inject if the pressure inside the can drops below a certain threshold (easy enough to rig up). My issue was the gas metering devices from LPG kits are like $200 and I don't have that for a concept that everyone is unsure about.
Although I definately believe that fuel injectors don't vaporize at all, atomization is not the same thing and most don't do it all that well. The fact that some fuel is used simply to absord heat as it boils in the cylinder makes sense to me. My old TBI I can see the wet 'dew' of fuel on the throttle body walls, definately not doing something right.
So in conclussion, does someone want to build me a Crower cycle engine that runs on already vaporized fuel so I can win the automotiveX prize? Come on I'll weld you up a nicely skirted and streamlined CRX to throw it in :-).
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