1. Registration trouble? Please use the "Contact Us" link at the bottom right corner of the page and your issue will be resolved.
    Dismiss Notice

Fhead Fuel Injection

Discussion in 'Flat Fender Tech' started by pfmg, Jul 24, 2019.

  1. Aug 13, 2019
    Lockman

    Lockman OK.....Now I Get It . 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Silver Hill,...
    Joined:
    Dec 4, 2018
    Messages:
    2,698
    I stand corrected, My apologies.
     
  2. Aug 18, 2019
    pfmg

    pfmg Member

    Billerica Mass
    Joined:
    Feb 10, 2010
    Messages:
    258
    The return solution, This should eliminate the excess pressure, and allow me to get some real data for a good tune.
    [​IMG]
    [​IMG]
    [​IMG]
     
    Twin2, ITLKSEZ and 47v6 like this.
  3. Aug 18, 2019
    47v6

    47v6 junk wrecker! 2023 Sponsor 2022 Sponsor

    USA
    Joined:
    Oct 25, 2006
    Messages:
    5,798
    This is just such a cool thing to do to an Fhead.
     
    Twin2, ITLKSEZ and OldAdobe like this.
  4. Aug 20, 2019
    pfmg

    pfmg Member

    Billerica Mass
    Joined:
    Feb 10, 2010
    Messages:
    258
    Making progress, my new top of tank return works, could be because its plumbed better, or maybe returning to the bottom of the tank isn’t the best idea as suggested on the net. Either way my return pressure dropped from 5 to pretty much 0 with the new set up. I also took the time to set up my filter with quick disconnects. So now with the quick disconnects and the shutoff valve i put at bottom of the tank, i can replace my fuel filter in about 2 minutes with no tools and little fuel spillage. I used quick disconnects on the pump too, so i can change that with only a 7/16 wrench to remove the mounting clamp. I pre-made a couple extra fuel filter setups to have handy.

    The way i figured it, this TBI system is pretty fuel proof, the only real issues involve fuel delivery, likely clogged filters or a bad pump. So by carrying a spare on the trail i can have either of these issues fixed very quickly

    Now i can log some good data, burn another chip and see how it runs now

    [​IMG]
    [​IMG]
    [​IMG]
    [​IMG]
     
    Twin2, 47v6 and ITLKSEZ like this.
  5. Aug 20, 2019
    jpflat2a

    jpflat2a what's that noise?

    Hermosa, SD
    Joined:
    Jul 30, 2003
    Messages:
    8,513
    What's the running fuel pressure and can that plastic fuel filter handle it ?
     
  6. Aug 20, 2019
    pfmg

    pfmg Member

    Billerica Mass
    Joined:
    Feb 10, 2010
    Messages:
    258
    System only runs at 13psi. But it doesn’t matter. The filter is before the pump, so no pressure
     
  7. Aug 20, 2019
    jpflat2a

    jpflat2a what's that noise?

    Hermosa, SD
    Joined:
    Jul 30, 2003
    Messages:
    8,513
  8. Aug 21, 2019
    Chuck

    Chuck Sponsor

    Southshore Ma
    Joined:
    Sep 19, 2004
    Messages:
    1,463
    Those clear plastic filters are typically 10-20 micron, I would be concerned the pump would be working harder then it should pulling fuel from the tank through it. Around 100 micron before the pump and 10 micron between the pump and injectors is a good rule. Nothing on the return line where you're looking for 0 psi.
     
  9. Sep 20, 2019
    Velociraptor_Implant

    Velociraptor_Implant New Member

    Dallas
    Joined:
    Jun 5, 2018
    Messages:
    9
    This is just the best.
     
  10. Apr 8, 2020
    durangotang

    durangotang Member 2022 Sponsor

    Not Western CO
    Joined:
    Mar 17, 2010
    Messages:
    501
    Curious if anyone following up with this has thought about running one of these for fuel needs? I have one a a wagoneer that I converted to FI and it's a very slick unit that lets you keep the factory fuel routing. FOr those that aren't familiar, it's a submersible electric fuel pump inside a container that is fed by the factory mechanical fuel pump and it already set up for bypass/return lines.

    [​IMG]
    RobbMc Performance Products - PowerSurge
     
  11. Apr 8, 2020
    Greevesman

    Greevesman Member

    Napa, Ca
    Joined:
    Oct 12, 2014
    Messages:
    417
    So, it looks and sounds terrific, is it better than a YF motor?
     
  12. Apr 9, 2020
    dozerjim

    dozerjim Member

    western New York
    Joined:
    Nov 22, 2010
    Messages:
    966
    Very cool!!!
     
  13. Apr 10, 2020
    jwinsley

    jwinsley Windblown

    Chattanooga
    Joined:
    May 4, 2011
    Messages:
    96
    pfmg, what size are the tires on your jeep?
     
  14. Apr 10, 2020
    Jw60

    Jw60 Sitting up n buckled down. 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Sedalia MO.
    Joined:
    Apr 8, 2008
    Messages:
    4,716
    A pm to pfmg would be more appropriate in the technical section. Also using @pfmg would send a nother level of notification. He primarily is on another Jeep Forum so it might be harder to get his attention.
    Thank You! (y)
     
  15. Apr 11, 2020
    Greevesman

    Greevesman Member

    Napa, Ca
    Joined:
    Oct 12, 2014
    Messages:
    417
    What other forum? Maybe we can find out there how it runs.
     
  16. Apr 11, 2020
    73 cj5

    73 cj5 Not ready for the junkyard yet

    Clinton, Mississippi
    Joined:
    Jan 10, 2014
    Messages:
    2,137
    32’s
     
New Posts