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  1. #1
    1131 Adam E.'s Avatar
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    Pressure Testing Evaluation (Pictures Attached)

    I just built my pressure test kit yesterday and there are a few things I would like to go over.

    1. Does my inlet barb fitting seem to be posititioned correctly? I used gasket material with plexi glass to seal the intake.
    2. What do you use to plug the oil plug on the intake manifold?
    3. Do I have to take off my exhaust manifold to seal up the ports or can I just seal the end of it?
    4. What kind of pressure am I looking to go to? Is anything higher than 6lbs dangerous?

    Adam
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  2. #2
    Mpeavler's Avatar
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    Quote Originally Posted by Adam E. View Post
    I just built my pressure test kit yesterday and there are a few things I would like to go over.

    1. Does my inlet barb fitting seem to be posititioned correctly? I used gasket material with plexi glass to seal the intake.
    2. What do you use to plug the oil plug on the intake manifold?
    3. Do I have to take off my exhaust manifold to seal up the ports or can I just seal the end of it?
    4. What kind of pressure am I looking to go to? Is anything higher than 6lbs dangerous?

    Adam

    You kinda went a different route...but it can work. What I would recommend is, take the pulse line coming from the case and make that your "filling" point of the air. Put your carb back on over the plexi glass "solid" piece with the gasket to keep that tight. Take a piece of paper and trace your exhaust side section and cut that with plexiglass also and then install that section of the exhuast to keep it sealed up.

    Pressure....it should hold 10 psi for 10 minutes. I would not have got that large of a gauge because it's easier to see losses with a 0-20 lb gague...but yours will work also.

    M

  3. #3
    1131 Adam E.'s Avatar
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    Quote Originally Posted by Mpeavler View Post
    You kinda went a different route...but it can work. What I would recommend is, take the pulse line coming from the case and make that your "filling" point of the air. Put your carb back on over the plexi glass "solid" piece with the gasket to keep that tight. Take a piece of paper and trace your exhaust side section and cut that with plexiglass also and then install that section of the exhuast to keep it sealed up.

    Pressure....it should hold 10 psi for 10 minutes. I would not have got that large of a gauge because it's easier to see losses with a 0-20 lb gague...but yours will work also.

    M
    As always thanks for the response Mike. I did not even think of using the pulse line as the air intake feed.

    Adam

  4. #4
    Here come the smokers! OBXJeepGuy's Avatar
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    Yeah, I put the pressure line to the two pulse fittings with a tee in the middle. I jacked mine to 13 psi, and held it for 45 minutes. Wheeee!

  5. #5
    Moderator OsideBill's Avatar
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    10 PSI is the max I will go on a motor, have to be careful not to blow a crank seal. I have a 0-15 psi gauge for motor testing. I use a 0-30, 0-60 and a 0-100 for carbs depending on which style I am testing.

  6. #6
    Stop staring at my tits NJJer's Avatar
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    Question

    How about pulling 10psi vacuum instead of positive pressure?

  7. #7
    Moderator OsideBill's Avatar
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    Quote Originally Posted by NJJer View Post
    Question

    How about pulling 10psi vacuum instead of positive pressure?
    Because there is no such thing as 10 PSI of Vacuum

  8. #8
    Here come the smokers! OBXJeepGuy's Avatar
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    Quote Originally Posted by OsideBill View Post
    Because there is no such thing as 10 PSI of Vacuum
    This is very true....



    Quote Originally Posted by OsideBill View Post
    10 PSI is the max I will go on a motor, have to be careful not to blow a crank seal. I have a 0-15 psi gauge for motor testing. I use a 0-30, 0-60 and a 0-100 for carbs depending on which style I am testing.
    I should not have posted what I did. I am in no way advocating pushing that kind of pressure for case testing. It just happens to be what I did. 10 psi is the max as Bill stated!

  9. #9
    Stop staring at my tits NJJer's Avatar
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    Quote Originally Posted by OsideBill View Post
    Because there is no such thing as 10 PSI of Vacuum
    Spoil my fun will ya

    Ok serious now

    I have checked by pulling a vacuum with a Mityvac. Ever try it that way Bill?

    Then again, I have been cocky enough to not check and trust myself. Gotta live on the edge once in a while.

  10. #10
    Flying Scotsman's Avatar
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    GP1200 test

    I take rubber sheet and block off the intake by installing the manifold over the rubber sheet.I do the same on the exhaust side I sandwich the rubber between the manifold and the cases.
    Then I take 2 of the pulse lines and connect them together.I take the 3rd pulse line and install a shreader valve in it to fill with air.
    Using this method you can use your tire pressure gage and check pressure.
    Or you can add a gauge on the pulse line your filling it with or in line on the 2 pulse line's you joined together.
    I have a shreader valve thats turned down to fit in the pulse line .

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