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Classic Goldwing Technical Forums
Engine & Fuel System Modifications
the PVC manifold didn't go so well so now I'm making one from copper plumbing parts
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<blockquote data-quote="chuck c" data-source="post: 135006" data-attributes="member: 2907"><p>Given those guidelines I'm right in the ballpark. Rerunning the numbers the 1.25" runners are about 211cc and the 3" ID plenum with 1.45" OD tube down the center is 1170cc. Now, that big pressure drop from the carb into the plenum has a real danger of causing fuel to condense out but the swirling should fight that. I think I would add a small clear blister on the bottom so I could see liquid gas collect if that was happening and how much. If it did and I couldn't eliminate it I would consider the design a failure.</p><p></p><p>If you're bored do a search on YouTube of guys using nothing more than a gas can or bucket instead of a carburetor just by having the air flow over a good size surface area of liquid gas. If it's warm enough gas vaporizes enough on its own. There are small engines and large pickups running this way. It's not very practical but I bet it could be a great way to run a generator that runs a fairly constant RPM. It's a bit dangerous because it's ready to burn all the way from the can/bucket/whatever to the engine's intake and most guys do this experiment using plastic flex hose with sketchy connectors. One spark and you're gonna have a really bad day.</p><p></p><p>My point is a little liquid gas in the plenum is no big deal as long as it stays there and doesn't go to the cylinders. It will vaporize again with good airflow.</p></blockquote><p></p>
[QUOTE="chuck c, post: 135006, member: 2907"] Given those guidelines I'm right in the ballpark. Rerunning the numbers the 1.25" runners are about 211cc and the 3" ID plenum with 1.45" OD tube down the center is 1170cc. Now, that big pressure drop from the carb into the plenum has a real danger of causing fuel to condense out but the swirling should fight that. I think I would add a small clear blister on the bottom so I could see liquid gas collect if that was happening and how much. If it did and I couldn't eliminate it I would consider the design a failure. If you're bored do a search on YouTube of guys using nothing more than a gas can or bucket instead of a carburetor just by having the air flow over a good size surface area of liquid gas. If it's warm enough gas vaporizes enough on its own. There are small engines and large pickups running this way. It's not very practical but I bet it could be a great way to run a generator that runs a fairly constant RPM. It's a bit dangerous because it's ready to burn all the way from the can/bucket/whatever to the engine's intake and most guys do this experiment using plastic flex hose with sketchy connectors. One spark and you're gonna have a really bad day. My point is a little liquid gas in the plenum is no big deal as long as it stays there and doesn't go to the cylinders. It will vaporize again with good airflow. [/QUOTE]
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Classic Goldwing Technical Forums
Engine & Fuel System Modifications
the PVC manifold didn't go so well so now I'm making one from copper plumbing parts
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