Fuel injection question

Discussion in 'Technical' started by j miller, Apr 7, 2020.

  1. j miller

    j miller Montana MCCI state rep

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    I'm installing a new gas tank and want to install a return line in case I want to install fuel injection later on. Is there a better point to place the return line and who has done this? What's the best way to add a port?
     
    j miller, Apr 7, 2020
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  2. Krazy Comet

    Krazy Comet Tom

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    Factory returns routed flow over pump, supposedly for cooling. As long as pump is at least partially submerged, I don't see issue. Don't run with less than 1/4 tank of gas.
     
    Krazy Comet, Apr 8, 2020
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  3. Craig Selvey

    Craig Selvey Indiana State Rep - MCCI

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    I thought you were going to keep this car all "stock"?
     
    Craig Selvey, Apr 8, 2020
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  4. dyent

    dyent Member

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    Back in the early 90's when I installed Holley's Pro-Jection TBI kit on my 74 Comet, I used the existing fuel vapor return line (one that went to the charcoal cannister). The only thing I had to do was drill out the "check valve" that was part of the "fuel vapor separator" assembly on top of the fuel tank, I think I drilled it out to either 1/4" or 5/16". I do not know what the 77 model was like, but must be similar?
    David
     
    Last edited: Apr 8, 2020
    dyent, Apr 8, 2020
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  5. Craig Selvey

    Craig Selvey Indiana State Rep - MCCI

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    1977 would have a plastic check valve. It would be different that what a 1974 tank would have.
     
    Craig Selvey, Apr 8, 2020
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  6. dyent

    dyent Member

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    Are you installing F30 Spectra gas tank? Perhaps you can use this assemble on top of your tank and then connect the existing fuel vapor return line?
    https://www.ebay.com/itm/Fuel-Vapor-Separator-Assembly-71-73-Mustang-Pinto-TBird-Maverick-Ford-Gas-Tank/254361475260?fits=Model:Maverick|Make:Ford&hash=item3b392018bc:g:E2IAAOSw~FJdf6uq
    David

    another option, here is sending unit with built in return line for Mustang, perhaps there is something for our Mav/Comet tanks?
    https://www.ebay.com/itm/64-68-Must...261033?hash=item51cbd7afa9:g:mpAAAOSw-yxU27rT
     
    Last edited: Apr 8, 2020
    dyent, Apr 8, 2020
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  7. 71gold

    71gold Frank Cooper Supporting Member

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    with my intank pump mod I was using the sending unit feed for the return.
     
    71gold, Apr 8, 2020
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