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Thread: Updated photos of Twin JAG

  1. #31

    Join Date
    Oct 2011
    Posts
    75
    Hi Crusty...I'm leaving the paint up to the wife lol. We are going to use a pearl basecoat vs white though.
    Measure it with a micrometer, mark it with a grease pencil & cut it with an axe.

  2. #32

    Join Date
    Oct 2011
    Posts
    75
    Photo right after successful first run of right engine on the airframe. I fabricated a cooling baffle to direct air through the cylinders. I could not be happier with the first run. The Ellison TBI performed flawlessly! I will be fabricating the subsystems for the other engine over the next few weeks now that I know there are no major issues with the right engine. I will be doing many more hours of engine runs on both engines over the next several months. Back to the hangar...

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    Measure it with a micrometer, mark it with a grease pencil & cut it with an axe.

  3. #33

    Join Date
    Oct 2011
    Posts
    75
    Here is a link to first start of right engine...

    http://youtu.be/pcImWpnbb2M
    Measure it with a micrometer, mark it with a grease pencil & cut it with an axe.

  4. #34

    Join Date
    Aug 2011
    Location
    Alabama
    Posts
    2,236
    Sweet!
    The opinions and statements of this poster are largely based on facts and portray a possible version of the actual events.

  5. #35

    Join Date
    Dec 2013
    Location
    Mount Gilead, Ohio
    Posts
    105
    That had to be a rather momentous occasion after all the work to that point, sounds strong.

  6. #36

    Join Date
    Sep 2015
    Posts
    3
    I have heard of issues with the Elison TBI providing unequal mixture to both banks in the split intake scenario. Have you compared head temps? I heard the spray bar should be fore-aft instead of cross ways. I know of someone who balanced theirs with a "Tornado" insert. Also, is one engine reverse rotation?

  7. #37

    Join Date
    Oct 2011
    Posts
    75
    Quote Originally Posted by DaveP View Post
    I have heard of issues with the Elison TBI providing unequal mixture to both banks in the split intake scenario. Have you compared head temps? I heard the spray bar should be fore-aft instead of cross ways. I know of someone who balanced theirs with a "Tornado" insert. Also, is one engine reverse rotation?
    Hi Dave,

    Both engines turn the same way. Too many cons vs pros in having counter rotating props. I made my own swirling device similar to the "Tornado". I feel they should swirl the air fuel mixture downstream of the Ellison so when it reaches the "y" in the intake, there will be even distribution. All the builders who have done this report very good results. I don't have all of my engine instrumentation yet so the verdict is still out. The Ellison can be mounted in any attitude. You should avoid having the spray bar vertical as g forces can affect the diaphragm thus affecting fuel delivery.

    Jim
    Measure it with a micrometer, mark it with a grease pencil & cut it with an axe.

  8. #38

    Join Date
    Sep 2015
    Posts
    3
    Quote Originally Posted by jimdc8 View Post
    Hi Dave,

    I made my own swirling device similar to the "Tornado". I feel they should swirl the air fuel mixture downstream of the Ellison so when it reaches the "y" in the intake, there will be even distribution. All the builders who have done this report very good results.

    Jim
    I see you have done your homework, then again, I already had that impression. Will you be using a Plenum system like M Langford? ( http://www.n56ml.com/corvair/phoenix/ )

    Dave

  9. #39

    Join Date
    Oct 2011
    Posts
    75
    Quote Originally Posted by DaveP View Post
    I see you have done your homework, then again, I already had that impression. Will you be using a Plenum system like M Langford? ( http://www.n56ml.com/corvair/phoenix/ )

    Dave
    Yes. Very similar to Marks. Using a K&N air filter with a flapper door selecting either ram air or carb heat.

    Jim
    Measure it with a micrometer, mark it with a grease pencil & cut it with an axe.

  10. #40

    Join Date
    Oct 2011
    Posts
    75
    Links to videos of left engine's first run on airframe...


    https://m.youtube.com/watch?v=UcaaDl3ch2U
    https://m.youtube.com/watch?v=xx1iTqUEXnU
    Measure it with a micrometer, mark it with a grease pencil & cut it with an axe.

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