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R Model Fuel Pressure Gauge Question

Discussion in '1965-1970 Shelby Mustang GT350 & GT500' started by Jerry_Moss, Dec 28, 2007.

  1. Dec 28, 2007 #1
    Jerry_Moss

    Jerry_Moss Well-Known Member

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    HI Guys

    New parts at home means new problems and new questions!
    The gauge i bought is a "mechanical" fuel pressure gauge.
    Did they really race with such a gauge in the 60´s ,70´s and 80´s???
    Is this still common today??
    In germany it is illegal to race wth such gauges.
    Especially for fuel. Just imagen the hose or gauge breaks
    in a crash what can happen is you get a fuel shower and probably burn
    inside your car! :cigar:

    Is there a chance to convert it to electrical?
    What would you say??

    Bye Jerry
     
    Jerry_Moss, Dec 28, 2007
    Jerry_Moss, Dec 28, 2007
    #1
  2. Dec 28, 2007 #2
    zrayr

    zrayr Well-Known Member

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    listen, what you do is put a diaphram fitting under the hood. From the fitting to the gauge the line is filled with antifreeze or some other non flammable liquid. So there is no danger of fire in the cockpit from a leaking or burst gas line.

    Z. Ray
     
    zrayr, Dec 28, 2007
    zrayr, Dec 28, 2007
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  3. Dec 28, 2007 #3
    Jerry_Moss

    Jerry_Moss Well-Known Member

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    Hi Ray

    I tought about something like this too but where can i get
    something like this what you call "diaphram fitting"??
    Have you something in your car?

    Bye Jerry
     
    Jerry_Moss, Dec 28, 2007
    Jerry_Moss, Dec 28, 2007
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  4. Dec 28, 2007 #4
    zrayr

    zrayr Well-Known Member

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    yes, I have one in my car that was installed when I had a Paxton Fuel pressure gauge installed in conjunction with a Paxton supercharger. It's an aluminum disk about 3 inches diameter, on one side of the disk is the fuel fitting, on the other side is the fitting for the hose that leads to the gauge. That side is filled with anitfreeze, etc. I don't know the make, or where it was sourced. I can't find a similar device on summit.com which surprises me. Perhaps someone else can chime in with a source. I will call my mechanic after the holidays to find out where it came from.

    Z. Ray
     
    zrayr, Dec 28, 2007
    zrayr, Dec 28, 2007
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  5. Dec 28, 2007 #5
    Jerry_Moss

    Jerry_Moss Well-Known Member

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    HI

    OK thanjks alot and is it possible to mount it without having air
    in the system? Or does it matter? I check also if i can find something.

    Send me information when you know something please! :rolleyes:

    Bye Jerry
     
    Jerry_Moss, Dec 28, 2007
    Jerry_Moss, Dec 28, 2007
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  6. Dec 28, 2007 #6
    zrayr

    zrayr Well-Known Member

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    it's a little tricky to fill everything with antifreeze with zero air bubbles, but I get it close enough for the fuel pressure gauge to work OK. The diaphragm is turned on it's side and filled up with the antifreeze, then the hose to the gauge is filled up with a dropper or such. Quickly attach the hose fitting to the diaphragm and screw it together. A few drops of liquid are bound to escape. But when the fuel side of the diaphragm is pressurized, it seems to expand enough against the antifreeze side to take up any "slack". Sorry I don't have a digital camera to help describe this. Will post more when I find out where the diaphragm came from on my car.

    Z. Ray
     
    zrayr, Dec 28, 2007
    zrayr, Dec 28, 2007
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  7. Dec 28, 2007 #7
    Jerry_Moss

    Jerry_Moss Well-Known Member

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    Hi Ray

    All i would have to do is put antifreeze in a bowl and screw all inside to bowl
    together inside of the fluid.
    Heres a picure of what they sell for motorsport in germany.

    [​IMG]

    Hope yours looks the same.
    Bye Jerry
     
    Jerry_Moss, Dec 28, 2007
    Jerry_Moss, Dec 28, 2007
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  8. Dec 28, 2007 #8
    zrayr

    zrayr Well-Known Member

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    the one I have is the shape of a pancake about 3" in diameter, about 3/4" thick.


    Z. Ray
     
    zrayr, Dec 28, 2007
    zrayr, Dec 28, 2007
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  9. Dec 29, 2007 #9
    Jerry_Moss

    Jerry_Moss Well-Known Member

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    Jerry_Moss, Dec 29, 2007
    Jerry_Moss, Dec 29, 2007
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  10. Dec 29, 2007 #10
    zrayr

    zrayr Well-Known Member

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    zrayr, Dec 29, 2007
    zrayr, Dec 29, 2007
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