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Diesel ignition propane injected

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Old 03-10-2012, 03:13 AM
62RatRod 62RatRod is offline
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Diesel ignition propane injected

I've read most of these threads and nobody I've seen had any ideas or posts about a propane fumigated/diesel ignition engine, so here I am. I have a 82' nissan datsun with a sd22 4 cylinder n/a idi diesel. It gets over 30 mpg but with the diesel prices I am looking for something better. I am fairly knowledgeable about propane injection so I figure I can handle this project. My few concerns are how to limit the diesel injection pump so that it will only serve as the ignition, and where to find a propane hat for the one barrel throttle body.
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Old 05-26-2012, 11:49 PM
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you don't need to "limit" the fuel pump. it will do that itself. your foot tells the governor what engine rpm is desired, it increases the power until that rpm is reached. if it is getting enough fuel from another source(propane) it will just inject less diesel because that rpm has already been reached.
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Old 06-15-2012, 12:23 PM
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This is an idi naturally aspirated motor so it has a butterfly valve that works in conjunction with the injection pump.. So the less vacuum it sees the more diesel it injects,, to a point.. The engine rpm also increases the amount of fuel injected I just want the injection pump to act like a distributor or just the ignition source and have the propane fuel the motor to higher rpms. There is also a rack on the fuel pump that controls how much fuel will be allowed to pass through the pump and it is attached to the throttle linkage,, I guess I will start with unhooking that linkage and plugging the vacuum lines to see if that will work.. I've been looking at impco's website for one barrel propane hats but they only give part numbers. I know they make all different sizes I just don't know how to find out which one will be the same size as my throttle body
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