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Thread: OT, how to fake a carburetor for a small engine with a jug and some tubing.

  1. #1
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    Default OT, how to fake a carburetor for a small engine with a jug and some tubing.

    https://www.youtube.com/watch?v=IuGWHfWqWtg

    This guy is the master of field expedient fabrication, often with JB weld.

    He's testing the theory about gas vapor being so much more efficient than a traditional carb.

    Spoiler, the numbers say he saved 2 or 3 % which was within measurement error.

    Sorry, no 160 mpg vapor carbs yet.
    Last edited by michigan doug; 01-12-2019 at 04:03 PM.

  2. #2
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    I did not watch the vid but will respond anyways --------- FIRE - FIRE ---- FIRE!!!


    did i get it right? lol

  3. #3
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    No fire. It ran pretty well on fumes.

  4. #4
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    Carburetors atomize fuel into fumes so why one earth would anyone compare an engine running on "fumes" to an engine running on "liquid gas".

    I figured the contraption he made would not be able to atomize the fuel enough for ignition but it appears that wasn't a problem so that was cool, but this is comparing apples to apples.
    Work hard play hard

  5. #5
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    Quote Originally Posted by Toolguy View Post
    No fire. It ran pretty well on fumes.
    till he creates a load on the engine and then melts a hole in his piston that is...

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    Quote Originally Posted by A.K. Boomer View Post
    till he creates a load on the engine and then melts a hole in his piston that is...
    If it was running too lean I think he would have noticed when he took the head/exhaust temperature. The temps were normal.
    Work hard play hard

  7. #7
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    The motor need "X" amount of fuel to run, weather it's drawn in as vapor or vaporized through the carb.
    If you lean it out too much it won't run.

    Hope he had time to finish cutting the grass!

    JL.............

  8. #8
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    Quote Originally Posted by 3 Phase Lightbulb View Post
    If it was running too lean I think he would have noticed when he took the head/exhaust temperature. The temps were normal.
    sounds like this vid is more technical than i gave it credit for - i'll watch it in the morning to see what's going on, maybe he ran it lean of peak? we'll see.

  9. #9
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    There is no way to get 160 MPG just by using a magic carburetor. An ICE is limited to about 20-30% efficiency, perhaps 40% for a diesel or fuel injection system. This is determined by laws of thermodynamics which so far have never been disproven.

    I have found references to operating a lawn mower engine using a microwave oven magnetron to vaporize a small amount of water into steam, with efficiency much greater than normal external combustion steam engines, but I've never seen an actual demonstration. It might have some validity, especially if the hydrogen and oxygen are dissociated and then burned, or if it causes some sort of "cold fusion". But it seems to me that a battery and efficient electric motor would be much better than any piston powered engine.

    http://amasci.com/freenrg/magputt.html

    https://www.physicsforums.com/thread...s-work.155052/

    https://www.physicsforums.com/thread...owaves.371527/

    https://patents.google.com/patent/CN205535704U/en

    https://answers.yahoo.com/question/i...7&guccounter=1

  10. #10
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    Quote Originally Posted by PStechPaul View Post
    But it seems to me that a battery and efficient electric motor would be much better than any piston powered engine.
    So where is the energy coming from to recharge the battery for the electric motor and how much efficiency is lost in all of the phase changes along the way?
    Wouldn't this be like thermal efficiency not mattering because the gas is free?

    The person with the concept of using a microwave magnetron to turn water into steam in your first link has an unusual viewpoint of how the real world functions.

    The engine turns the alternator which keeps the battery charged, which supplies the electrical power for the magnetron.
    Home, down in the valley behind the Red Angus
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