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Thread: 1937 ULH low Cylinder Pressure

  1. #21
    Join Date
    Sep 2016
    Location
    Oregon
    Posts
    152

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    Quote Originally Posted by shinedogg View Post
    She hasn't run yet with these cylinders
    hard to get an accurate reading when the parts haven't been seated & broken in yet.

  2. #22
    Join Date
    Jun 2001
    Location
    Central Illinois, USA
    Posts
    4,784

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    If your "leak-down" test equipment, Shinedogg,..

    Puts air to the combustion chamber at the sparkplug holes, then you might avoid the bother of calculating the rate.

    Just listen at the timing hole, carb, and exhaust as you turn it through.

    ....Cotten
    AMCA #776
    Dumpster Diver's Motto: Seek,... and Ye Shall Find!

  3. #23
    Join Date
    Sep 2009
    Location
    Alaska
    Posts
    151

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    OK so after fine tuning my home made leak down tester, I put 150 psi in each cylinder, which slowly leaked down until about 90, then held. I thought that was pretty good. I turned the engine over until compression started in the front cylinder. Tapped the kicker over until the mark came up in the timing hole, not straight up, but almost. The small cam of the timer was almost ready to start opening the points. With a little coaxing, and the ignition on, I turned the advance and the plugs fired. The pictures show before I turn the timer. Anything wrong here, before I take her down off the lift to start kicking?20200402_201801.jpg20200402_201736.jpg
    Last edited by shinedogg; 04-02-2020 at 11:33 PM. Reason: add picture
    Steve

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