Home Forums Tech Talk Leak Down – What Is It?

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This topic contains 8 replies, has 6 voices, and was last updated by  Greg Wright 4 months, 2 weeks ago.

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  • #64042

    tony zambos
    Participant

    The USPKS/Route 66 series posted a message that engines will be checked for leak down. What is leak down and how is it checked?

    LAD Specialties / tony kart / rotax / kt100

    #64044

    Matt Martin
    Participant
    #64069

    tony zambos
    Participant

    if that’s all it is, that’s great. Can’t see how an engine with a single piston ring wouldn’t leak and still run. Yes, we’ve melted a couple pistons so well into the bore that they probably had zero leak down.

    Thanks Matt

    LAD Specialties / tony kart / rotax / kt100

    #64076

    Greg Wright
    Participant

    Actually I think they are looking for air leaks. On engines with restricted carburetion example Yamaha Jr, Sportsman with the WB55 carb and also with Comer K-80s some builder have intentionally leaked air to the engine via intake manifold or crank seals. More air=more fuel+more power. They can be a bitch to start though.

    Greg Wright
    Rapid Racing Inc.

    "When in doubt Gas it, It won't help but it ends the suspense."

    #64078

    David Cole
    Keymaster

    What Greg said. I just learned about it myself.

    David Cole - eKartingNews.com Managing Editor -
    @DavidColeEKN

    #64089

    tony zambos
    Participant

    Greg, David, Matt,

    Thanks for the responses.

    LAD Specialties / tony kart / rotax / kt100

    #64111

    Timothy Strawkas
    Participant

    Ever notice the smell of starter fluid on the grids has become stronger and stronger over the yrs. This is the leading cause of the source. Not the only reason mind you, but…

    #64180

    Bill Angel
    Participant

    From what I hear a tech update from WKA on leakdown is coming soon.

    #64181

    Greg Wright
    Participant

    I believe that IKF installed that rule a few years ago.

    Greg Wright
    Rapid Racing Inc.

    "When in doubt Gas it, It won't help but it ends the suspense."

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