Water Temp Guage

Discussion in 'F/I Mods & Tuning' started by NHXRUNNER, Aug 9, 2016.

  1. NHXRUNNER

    NHXRUNNER "New Hampster"
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    Ok, I know I've been flooding the boards with gauge questions, but I think this is the last one. So I have the Innovate MTX-D water temp gauge, and I intended to use it to monitor the coolant temp for the S/C, thinking the thermistor was just a small prob I could slide into the low temp radiator fins. Well, the thermistor is threaded and much larger than the temp probe I expected. Trying to achieve the same result, can I drill a hole in the side of the s/c coolant reservoir and thread this in with some thread tape? My worry is that the plastic reservoir and brass (I think) thermistor will expand at different rates causing a leak. Monitoring this way helps me two fold. 1) if the temp spikes I know something is up (pump isn't running), and 2) if the reading disappears I know the coolant has dropped below the level of the thermistor and I'm leaking coolant.

    Suggestions welcome!!
     
    #1 NHXRUNNER, Aug 9, 2016
    Last edited: Aug 9, 2016
  2. Slywhitty

    Slywhitty "Midget Magnet"

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    I wouldn't tap a hole in that tank. Just asking for issues. But maybe someone has done it and it's ok. I dunno lol. But I would go with something like this (not this exact one but one that would fit the rubber house on the inlet or outlet of the tank. https://m.summitracing.com/parts/atm-2281
     
  3. NHXRUNNER

    NHXRUNNER "New Hampster"
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    #3 NHXRUNNER, Aug 9, 2016
    Last edited: Aug 9, 2016
  4. Slywhitty

    Slywhitty "Midget Magnet"

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    Haha I knew it would be close. Wasn't sure the size on the coolant hoses on the trd blower so picked what I thought was close lol
     
  5. Coupe

    Coupe Active Member

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    The temperatures in the s/c cooler tank will be low. You will need a gauge that reads 40F to about 130F.

    A lot of water temp gauges start at the 120F~130F.
     
  6. Coupe

    Coupe Active Member

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    This was my take on this.

    SPA gauge with a dual reading, before and after the intercooler.

    [​IMG]

    One sender in hose.[​IMG]

    One sender in tank. Both could have been in the hoses.
    [​IMG]

    Driving around normally, the two readings are 1 ~ 3 degrees F different. Jump on it and let the S/C build some heat, the delta will rise over 10F in a few seconds.
     
  7. NHXRUNNER

    NHXRUNNER "New Hampster"
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    Well shit....the gauge I have only reads down to 120F....so you're telling me normal operating temp is 10-15F below what I can pick up?
     
    #7 NHXRUNNER, Aug 9, 2016
    Last edited: Aug 9, 2016
  8. Coupe

    Coupe Active Member

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    The s/c coolant runs about 10F ~20F over ambient temp without boost. Add a little boost and it will jump up 10F to 20F.

    In the peak of summer in Houston (100F ambient) I might see 130F.

    It will read the hottest after you shut off the engine for a few minutes and heat soak takes over. It takes a few minutes to bring the s/c coolant temps down, when you restart the engine. You need the engine fan moving and the s/c coolant pump energized to bring the temps down.

    In the winter, the temps are going to be very low. If 40F outside, it will be about 50F.

    You need another gauge.

    For the record, I made the same mistake.
     
  9. blackx-runner

    blackx-runner "White Flash"

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    Should have asked the pros here first.
    Silly NOOB. :eviltongue:
     
  10. NHXRUNNER

    NHXRUNNER "New Hampster"
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    Damnit, what type of gauge is that, I know the brand, but what is it's intended use?
     
  11. Coupe

    Coupe Active Member

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    The part no is DG-210B It was meant to measure differential water temp on air/water intercoolers.

    It could be used to monitor any two water sources.
     
  12. NHXRUNNER

    NHXRUNNER "New Hampster"
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    So are there any other gauge options for this purpose? I'd love to splurge for the Spa but I need a more economical option.

    Anyone ever heard of VEI Systems? Looks like they've got a gauge that might work....
     

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