Results 1 to 6 of 6

Thread: Mechanical Fuel Pumps

  1. #1
    Senior Member
    Join Date:  Feb 2016

    Posts:    943

    Mechanical Fuel Pumps

    I had a few spare minutes this afternoon so I modified my "Torino" (versus Sofabex) fuel pump:

    Airtex1436OtherStyle.jpg MechanicalPumpTorino1.jpg

    The 1/4" barb is not 1/4" ID -- it has an extremely small hole at the bottom (Sofabex does too):

    MechanicalPumpTorino2.jpg

    Bill Robertson
    #5939
    Last edited by content22207_2; 06-19-2016 at 07:00 PM.

  2. #2
    Senior Member
    Join Date:  Feb 2016

    Posts:    943

    That hole is fantastically small -- .024".

    I highly doubt I could feed my carburetor through it (each jet in my carb is .048").

    Bill Robertson
    #5939

  3. #3
    Senior Member
    Join Date:  Feb 2016

    Posts:    943

    Sofabex pump (note the extremely small ID 1/4" barb):

    MechanicalPumpSofabex.jpg

    Out of the box the 5/16" barbs don't have any sort of rib at the end -- I used a tube flaring tool to give the hose clamps something to butt up against.

    (This is the pump I drove to Chicago on. My fuel lines are 1/4", so I had to adapt them up to the pump. The new pump has 1/4" barbs:

    ModifiedMechanicalPump.jpg

    I've run out of barbs to modify this one -- I'll order some in).

    Bill Robertson
    #5939

  4. #4
    Senior Member
    Join Date:  Feb 2016

    Posts:    943

    MechanicalPumps.jpg

    (These are spares, Sofabex on the left, BCD Torino on the right).

    Bill Robertson
    #5939

  5. #5
    Senior Member
    Join Date:  Nov 2011

    Location:  Rochester, NY

    Posts:    277

    My VIN:    1776

    Quote Originally Posted by content22207_2 View Post
    That hole is fantastically small -- .024".

    I highly doubt I could feed my carburetor through it (each jet in my carb is .048").

    Bill Robertson
    #5939
    My guess is that that port was intended as a vapor bleed and relief port, to keep the flow rate through the pump to some minimum, even at times of low engine demand. I have it connected to the former fuel return line.

    On my Solex setup, there is only one fuel line leading from the pump to the two carburetors; the 1bbl has two barbs on the inlet side, one of which daisy-chains to the inlet of the 2bbl. This is how it was connected on the Alpine GTA my manifold came from. It may have been different on other cars.

  6. #6
    Senior Member
    Join Date:  Feb 2016

    Posts:    943

    For a 2100, 1/4" barbs in and out work great:

    MechanicalPump.jpg

    I've repurposed the old K-Jet return line as a front to rear fuel line (old accumulator tee capped off). My previous rubber fuel line now serves as a vent line (tank vents from one end of the car to the other then back up front again).

    Bill Robertson
    #5939

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •