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Technical Fuel bypass line

Discussion in 'Traditional Hot Rods' started by mark hogan, Mar 30, 2026 at 3:13 PM.

  1. mark hogan
    Joined: Jul 27, 2022
    Posts: 164

    mark hogan
    Member

    Was wondering if anyone running a AV8 30 using the cowl tank? ever ran a byp*** fuel system return line back to the gravity feed to fuel pump and installed a tee fitting just ahead of fuel pump. To relieve pumps unused pressure ! Would it work I’m wondering. Thanks
     
  2. 19Eddy30
    Joined: Mar 27, 2011
    Posts: 4,426

    19Eddy30
    Member
    from VA

    As Fuel dropped the weight of fuel would be less , With experimenting I think I might would use a popet
    Play with spring So from full tank popet open then @ certain point close to keep
    Engine requirement happy .
    Or maybe Even away to control a vent
    Size closed to small opening when full
    as leave drops the vent hole open to bigger size to increase flow / psi ?

    Like finger on straw , remove finger liquid falls out.

    I would experiment with low pressure sensors Like no bigger then max 10 psi
    just test in way the Gravity psi from Tank
    Full to 1/4 tank , & do***ent
     
    Last edited: Mar 31, 2026 at 2:41 AM

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