Test firing the water injection




But, having 6 nozzles means they have to be *very* small. .006", and I kept having trouble with them plugging, even with a filter. It's like you need a clean room environment to keep something from getting in. I think a better design for the IC would be to have 2 WI nozzles. One from each end facing each other. That way they can be much bigger and less likely to clog. For now, no WI.

I have been thinking seriously about going full propane. The only downside is I still drive it long distances. Around town, or trailer'd it wouldn't be so bad, but for long distance, the reduced range and sketchy filling stations make it a hard thing to do.

Turbo's/SC sure do love the octane though. I could even plumb my IC into the propane converter instead of rad fluid. It'd be like the ricers using ice chests for the drag strip <img src="/forums/images/graemlins/cheers.gif" alt="" />

For now, in lieu of WI, I'm thinking propane injection under boost. More or less like water, but propane instead. The Lightning TB has this nice big port in the bottom of it that doesn't go anywhere. So I tapped it and drilled in from the back side so the 'pane is injected behind the butterflies...



It works something like this:





But, if I meter it at the solenoid, then expansion happens in the line and it freezes up like you can see in the pic above after just 5 - 10 seconds. So I'm planning now on using a nozzle at the point of injection instead. This will keep the LPG liquid all the way up to the nozzle itself so the *full* cooling of the expanding propane goes directly into the air charge. Test 2 uses a filtered nozzle I've used for WI in the past:




And after 30 seconds, the TB and nozzle are cool, but not cold and no condensation:




Any other ideas? I'm still tossing things around. I figured this was a pretty safe test cause I can always just put in an NPT plug if I don't use it.

--Dan