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6-71TIB's adding Maretron Flow meters

Discussion in 'Post Yacht' started by My Affair, Jan 21, 2018.

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  1. Capt Ralph, Jan 26, 2018
    #21
    Capt Ralph

    Capt Ralph Senior Member

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  2. MBevins, Jan 27, 2018
    #22
    MBevins

    MBevins Senior Member

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    Yes I see that, but the OP has purchased MR2s which only have a 1/4" port.
    It is interesting though that the two larger sizes listed appear to be newer products from when I first researched this 2-3 years ago.
  3. My Affair, Jan 27, 2018
    #23
    My Affair

    My Affair Member

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    The larger ports I see are for much larger minimum flow, well above the level . If the unit is rated to flow up to 132 GPH how will the smaller port impede the operation- what am I missing? While I realize the hoses and a lot of the fittings are larger on the supply & return lines, however when you look at the actual orifices that some of the hose and fittings use to connect from the secondary filter to the engine, then from the engine to the fuel cooler those fittings appear to be small- maybe not 1/4" but still small.
  4. MBevins, Jan 27, 2018
    #24
    MBevins

    MBevins Senior Member

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    True but if the engine's larger hoses and fittings are actually smaller, what do you think the orifice size is for the 1/4" port? 1/8"? 3/16" ?

    I'm not a fluid engineer (if there is such a thing) but I know there are calculations that can determine the flow restrictions of different size orifices.
  5. My Affair, Jan 27, 2018
    #25
    My Affair

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    OK, I wonder if the fuel pump on a 6-71 has enough pressure to push the flow I need to reach WOT going through that device. The flow reached on their website may be using an electric pump or one of higher capacity. I've now gone as far to ask technical support- what if after they are installed on my engines and I cannot make WOT after the install what will they do to support me. The fact that they cannot give me one example of these devices in an Detroit Diesel 6-71TIB installation is a cause for concern
  6. My Affair, Jan 28, 2018
    #26
    My Affair

    My Affair Member

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    attached is a photo of an install of Cat 3126- appears to have a higher fuel rate usage than my 6-71's?
    Maretron flow meters.jpg upload_2018-1-28_16-17-46.png upload_2018-1-28_16-20-31.png

    Maretron flow meters.jpg
    upload_2018-1-28_16-17-46.png
    upload_2018-1-28_16-20-31.png
  7. Capt Ralph, Jan 28, 2018
    #27
    Capt Ralph

    Capt Ralph Senior Member

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    Again, these are fuel consumption curves, NOT the thru flow of fuel in a Detroit.
    Lots of fuel is returned to the tank from a Detroit. Usually by way of a fuel cooler.
    Sadly, I can not quote the numbers.
    I have witnessed a broken hose after the restrictor on a 12V71TA at fast idle on the ICW; 1/2" hose and I could of sprayed down the bilges like a hot water hose,, as it was trying to do already.
    Not a pretty day but good example.
    I'm not a Cat heavy but I don't think they return a lot of fuel.. Somebody help me here.
  8. d_meister, Jan 29, 2018
    #28
    d_meister

    d_meister Senior Member

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    You might try Gemeco for real-world solutions for Maretron. They're the major East Coast distributor for all things transducer, Maretron, NMEA 2000 and you-name-it. They have an excellent technical department with real experience with product installation. I've used them in the past for Maretron tank sounders for a 2000 bus. Check them out HERE.
    BTW, I have no relationship with Gemeco other than as a very impressed customer.
  9. My Affair, Jan 29, 2018
    #29
    My Affair

    My Affair Member

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    I know my DD 6-71's flow 90 GPH at roughly 70-80 psi. I've asked Maretron for help, their reply was that they're not going to be responsible for a customers installation...

    Question is how do you calculate the flow through a 1/4 inch orifice at 70 psi? upload_2018-1-29_20-3-2.png

    Also, I wanted to note the inverted flare fuel restriction orifice head inside the elbow fuel inlet is 1/4 x 5/16 NTP. This is the elbow that connects the fuel hose from the secondary filter to the engine. I found this example on Diesel pro.
  10. Capt J, Jan 29, 2018
    #30
    Capt J

    Capt J Senior Member

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    A 12
    A 12v71TI will return around 100 GPH at 1000 rpms.

    Why is it so hard to just print out the fuel curve graph and calculate your fuel burn on any engine? I never have any issues keeping track of fuel burn on any boat I run and don't need a magic device to do it for me.
  11. Capt Ralph, Jan 30, 2018
    #31
    Capt Ralph

    Capt Ralph Senior Member

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    My flow scans have never been calibrated. I feel they are close but I don't count on any precision.
    However, a few times now when the flows are different than what I'm accustomed to, was the beginning of some problems.
    So for me, it's more of a diagnostic tool than constant hunting for MPG.

    My factory fuel chart is pretty close and refer to it when I need some real depression.
  12. My Affair, Feb 3, 2018
    #32
    My Affair

    My Affair Member

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    So, choices are reduced with FloScan closing its doors:
    To
    Message body
    It is with regret that I must inform you that FloScan will be closing its doors at the end of February. We have had a great 40-year run but the past few years have been difficult to maintain operations and profitability. We are currently taking final orders up until the end of this month. However, the FloScan model type and quantity that we can build and ship will be subject to availability. Lastly, we are in negotiations with a buyer to take over supplying spare parts and will advise once this matter is finalized.



    We sincerely appreciate your business over the past 4 decades and wish you well.



    Regards,

    Joe Dydasco

    Sales Manager



    [​IMG]

    FloScan Instrument Co., Inc.

    3012 NE Blakeley Street

    Seattle, WA 98105

    Tel: 206-524-6625 Ext 316

    Cell: 206-465-6136

    Fax: 206-523-4961

    E-mail: joe.dydasco@floscan.com

    Web: www.floscan.com
  13. MBevins, Feb 3, 2018
    #33
    MBevins

    MBevins Senior Member

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    Back to your Maretron install,

    Did you find the formula for flow rates through the orifice?
  14. My Affair, Feb 3, 2018
    #34
    My Affair

    My Affair Member

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    yes, Responded off-line.
  15. RT46, Feb 5, 2018
    #35
    RT46

    RT46 Senior Member

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    Floscan shutting down is bit shocking.
    I guess the modern electronic diesel engines with their own fuel consumption calculators have impacted Floscan.
    Also, same with modern gas outboards.
    Does that make Maretron the only choice for mechanical engines?
  16. Capt J, Feb 5, 2018
    #36
    Capt J

    Capt J Senior Member

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    I have never run a vessel with flo-scans that worked correctly.......very very few didn't act wonky at either slow speeds and read incorrectly or get crudded up and stop reading. Rarely have I run a yacht where they operated properly.
  17. My Affair, Feb 5, 2018
    #37
    My Affair

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    I installed floscans in my last boat, and was able to achieve very satisfactory results- the install manual was very straight forward.

    From what I understand Maretron is the last best answer.
  18. Matt46post, Apr 28, 2018
    #38
    Matt46post

    Matt46post Senior Member

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    Has anybody put maretron or a similar engine monitoring systems on there older 671 TIs? I believe you need to get it to the J139 system to get the info to the maretron to get it to digital nmea display, I am considering it along with tank monitoring and fuel flow
  19. Capt Ralph, Apr 28, 2018
    #39
    Capt Ralph

    Capt Ralph Senior Member

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    Joe Dydasco <joe.dydasco@floscan.com> Has yet to respond to my e-mails.
    Their web site has yet to make any comments of closing and new products are selling.
    What did I miss?
  20. Capt Ralph, Apr 28, 2018
    #40
    Capt Ralph

    Capt Ralph Senior Member

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    I have Detroit customers asking to interface to Simrad displays.
    Eager to learn more about these Maretron thingies.
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