How are you recording speed with your data logger?
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How are you recording speed with your data logger?

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    Back into Boats Beal Motorsports's Avatar
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    Default How are you recording speed with your data logger?

    I'm looking into data loggers. My boat has a Norskog but we want to record it. Would you just use a pressure transducer and equate pressure to speed?
    Also how are you mounting them?

    Thanks.

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    Senior Member Boat 405's Avatar
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    Quote Originally Posted by Beal Motorsports View Post
    I'm looking into data loggers. My boat has a Norskog but we want to record it. Would you just use a pressure transducer and equate pressure to speed?
    Also how are you mounting them?

    Thanks.
    The short answer yes. The old qwik data will record the data for you from a pressure transducer and give you a graph showing readings, I believe it takes data 500 times per second. This display with be shown in psi which can be easily converted into mph and is quite accurate. The equation for psi to mph is

    PSI(square root) x 8.31 = MPH

    Example

    144 PSI (square root) x 8.31 = 99.72 MPH

    The new qwik data II can do the conversion for you and the graph will show mph. Racepak is also this way that it will do the math for you.

    A few of us are running a speedo pickup tube located on the skeg of the intake fins.

    I have another boat that this was not possible to do since the intake was already in the boat. So I made a pickup tube hang off the back the boat.

    Both of these have a small nylon tube running up to the transducer that is hooked up to the data logger.
    Last edited by Boat 405; 01-18-2010 at 04:37 PM.
    Boat 405.

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    21 Daytona Outlaw's Avatar
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    Quote Originally Posted by widowmaker View Post
    The short answer yes. The old qwik data will record the data for you from a pressure transducer and give you a graph showing readings, I believe it takes data 500 times per second. This display with be shown in psi which can be easily converted into mph and is quite accurate. The equation for psi to mph is

    PSI(square root) x 8.31 = MPH

    Example

    144 PSI (square root) x 8.31 = 99.72 MPH

    The new qwik data II can do the conversion for you and the graph will show mph. Racepak is also this way that it will do the math for you.

    A few of us are running a speedo pickup tube located on the skeg of the intake fins.

    I have another boat that this was not possible to do since the intake was already in the boat. So I made a pickup tube hang off the back the boat.

    Both of these have a small nylon tube running up to the transducer that is hooked up to the data logger.
    any pics of the pickup tube on the intake fins? this would beat drilling holes in the transom
    #55

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    B1 Racing cs19's Avatar
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    Quote Originally Posted by Outlaw View Post
    any pics of the pickup tube on the intake fins? this would beat drilling holes in the transom
    Its no easy task, better off running one off the transom.

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    Senior Member DuaneHTP's Avatar
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    Beal Motorsports.
    Sent you a PM.
    Duane HTP

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    Back into Boats Beal Motorsports's Avatar
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    Thanks guys.

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