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Low fuel thermister-supplier?

Discussion in 'EFI Topics' started by Jwooky, Jan 27, 2014.

  1. Jwooky

    Jwooky Well-Known Member

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    Anyone know who makes the in tank thermister?
     
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  2. KaptinAmerika

    KaptinAmerika Well-Known Member

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    Any numbers on the Thermistor
    My understanding is the fuel pump setup in the Big Dog is very similar to Victory.
     
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  3. Jwooky

    Jwooky Well-Known Member

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    Dont know how, but mine is missing???

    The can is was potted in is there, but the thermister/wire/connector is gone.:eek:

    It is not part of the fuel pump assy.
     
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  4. KaptinAmerika

    KaptinAmerika Well-Known Member

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    That is odd
    I did some research but couldn't find any under $30.
    I'm waiting on a quote from a supplier overseas, seems like America makes almost nothing anymore.
     
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  5. 1BADK9

    1BADK9 Limited Edition Member

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    At least they still make Kaptins!! :cheers:
     
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  6. Jwooky

    Jwooky Well-Known Member

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    Thank you, look forward to hearing from you.
     
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  7. Tdubb

    Tdubb Active Member

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    Contact Rylan Vos at The Vic Shop. He specializes in rebuilding Victory fuel pump assemblies. He may have a source. rylan.vos@thevicshop.com
    515.339.4313
     
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  8. ground pounder

    ground pounder Active Member

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    S@S sells a replacement thermister for our bikes. Part number 55-5087.
     
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  9. headshothills

    headshothills Member

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    S&S worthless!! Called, even though its in their 2015 Catalog, its obsolete per the rep on the phone..

    Needless to say... Called Rylan Vos at the Vic Shop above...

    Vic Dealer part number 2520678 about $35 bucks!! BOOM!! Big shout out to Rylan and Tdubb for the info!! The Vic dealer might tell you Vic part numbers are 7 digits, tell him to look it up, its in his IPB if he gives you any grief like the one locally did... If they punch it in, and nothing shows up, chances are they have never ordered one before, which was the case here in AZ with the dealer I called...
     
    #9 headshothills, Nov 25, 2015
    Last edited: Nov 25, 2015
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  10. chubs

    chubs Well-Known Member

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    Seems like some " dealers" just want to push new bikes, and don't have time to help parts customers. That's how the local H D superstore seems to be. Needed a rear turn lite for a sporty and the parts counter said they couldn't get it. Went 40 miles away to another store and they had 4 in stock, didn't even have to look part number up in the book Well worth the trip! :old2::chopper:
     
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  11. francoblay1

    francoblay1 The Spaniard

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    Ok.................. I need to ask...... WTF is a "thermister"????? :oldroll:
     
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  12. francoblay1

    francoblay1 The Spaniard

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    Oh right!!! Silly me.... :oldbang:

    https://en.wikipedia.org/wiki/Thermistor

    Assuming, as a first-order approximation, that the relationship between resistance and temperature is linear, then:

    [​IMG]
    where

    [​IMG], change in resistance
    [​IMG], change in temperature
    [​IMG], first-order temperature coefficient of resistance
    Thermistors can be classified into two types, depending on the classification of [​IMG].
    [​IMG]
    This [​IMG] coefficient should not be confused with the [​IMG] parameter below.

    Steinhart–Hart equation
    Main article: Steinhart–Hart equation
    In practice, the linear approximation (above) works only over a small temperature range. For accurate temperature measurements, the resistance/temperature curve of the device must be described in more detail. The Steinhart–Hart equation is a widely used third-order approximation:

    [​IMG]
    where a, b and c are called the Steinhart–Hart parameters, and must be specified for each device. T is the absolute temperature and R is the resistance. To give resistance as a function of temperature, the above can be rearranged into:

    [​IMG]
    where

    The error in the Steinhart–Hart equation is generally less than 0.02 °C in the measurement of temperature over a 200 °C range.[3] As an example, typical values for a thermistor with a resistance of 3k Ω at room temperature (25 °C = 298.15 K) are:

    B or β parameter equation
    NTC thermistors can also be characterised with the B (or β) parameter equation, which is essentially the Steinhart–Hart equation with [​IMG], [​IMG] and [​IMG],

    [​IMG]
    Where the temperatures are in kelvin and R0 is the resistance at temperature T0 (25 °C = 298.15 K). Solving for R yields:

    [​IMG]
    or, alternatively,

    [​IMG]
    where [​IMG].

    This can be solved for the temperature:

    [​IMG]


    etc etc etc........................................ :chopper:
     
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  13. Jwooky

    Jwooky Well-Known Member

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    Lol, or in simple terms a resister that changes resistance with temperature.

    Same device your car uses to display temperature.

    S&S has them but they don't like to sell direct to consumers. You will likely have to go through a S&S dealer.
     
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  14. chubs

    chubs Well-Known Member

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    I knew it, I just knew it! Sven is really Franco in disguise!
     
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  15. francoblay1

    francoblay1 The Spaniard

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    :oldhardlaugh::oldhardlaugh::oldhardlaugh::oldhardlaugh:

    Actually, I was expecting Sven to jump in..... @Sven Where are you???? please throw some light in here! :old2:
     
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  16. Sven

    Sven Well-Known Member

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    I'll take a 'crack' at it. From one diode to another, there is this 'Doping' of a chemical onto/into a metal/crystal. For a metal, static electricity will take out a blackbox, you needing to ground yourself to the case of the computer tower before you touch internal components. What happens is it raises that doping layer 'magnetically off the part' = Junk.

    Liquid wise, 'Hanging with Franco' schooled me on Bariumcobalt fluoride. Basically a crystal with a reaction to being magnetically perfect in crystal form at 'room temp.' Then, you apply current to it, the heat then magnetically uncouples the crystals, breaks down in resistance as temp rises, a.k.a., the curie point.
    http://www.exploratorium.edu/snacks/curie-point

    You can work both actions being AC driven so I could make a water temp sensor, let the heat via water temp rising, magnetically break down the crystal inside the sensor, magnetically contracts back when brought back to room temp. Meanwhile, the gauge is responding to the change in heat.

    I could add heat to it, magnetically break it down as it is submerged in fuel. My idea is to run a long toothpick in diameter of a metal probe; up inside the tank. The prob is exposes to air [no longer being cooled in liquid], where this crystal part moves back to room temp. This resistance inside the probe is receiving a new resistance in a different heat change. This change or exposure; reads as a gas gauge showing the more the probe is exposed to air, the more crystal coverts this value to reading less gas.

    Something like that... How close am I?
     
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  17. francoblay1

    francoblay1 The Spaniard

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    :whoop: I knew you wouldn´t disappoint me.... Now I understand it!!! (Wikipedia really talks funny sometimes!) :old2:

    :cheers:
     
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  18. headshothills

    headshothills Member

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    For Franco...

    A Thermister - "In simple terms" - Activates the Low Fuel light - HAHAHA :old2:
     
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  19. SKOGDOG

    SKOGDOG One of the old ones.
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    Thanks for the great lead, guys....I just called the local Victory dealer to order part # 2520678 and should have my thermistor Thursday.....just in time to compliment the D O C's ECH install. Now my low fuel light will glow as it should.
     
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  20. Th3InfamousI

    Supporting Member

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    Hang on Rick, what did I miss you getting rid of the cold issue EHC? Or did it die?

    Sent from my 2PS64 using Tapatalk
     

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