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

Norcal69's Common Sense Build.

Discussion in 'Builds and Fabricators Forum' started by Norcal69, Sep 11, 2014.

  1. Mar 30, 2020
    FinoCJ

    FinoCJ 1970 CJ5 Staff Member

    Bozeman, MT
    Joined:
    Jul 18, 2013
    Messages:
    5,593
    that is what I was wondering...I haven't seen a 2bbl offy intake at the normal suppliers these days (although guessing there was probably one made at some point back in the day). I already have the tank and return line swtiching valve - not pretty but it works...the new Holley sniper TBI I think can be set up direct to stock 2bbl intake....otherwise its the 4bbl offy intake as part of the the TBI swap...its adding the higher pressure fuel supply pump (fuel commander as FiTech calls it) that I am not so excited about...Anyway, the Willys has taken all free budget so it ain't gonna happen...
     
  2. Mar 30, 2020
    Norcal69

    Norcal69 Out of the box thinker 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Northern California
    Joined:
    Sep 6, 2014
    Messages:
    3,549
    I have thought about going with a 6 way brass valve for feeding and return to the feed tank.... Then use the stock pump and a Fuel commander or similar to feed the injection...... It just seems like too many parts to fail that aren't "riggable" to get home...... I may get there some day, but 99% of what I do the MC2100 does just fine.
    If my good old mechanical fuel pump fails.... I guarantee you I can rig something up to get us out of the woods.
    I just have to tell my wife this is a stress ball.... squeeze it and my stress will be lowered.....

    [​IMG]
     
    Muzikp and Fireball like this.
  3. Mar 30, 2020
    FinoCJ

    FinoCJ 1970 CJ5 Staff Member

    Bozeman, MT
    Joined:
    Jul 18, 2013
    Messages:
    5,593
    Exactly how I feel with my set-up and R2g
    What mechanical pump are you using...My old pierce pump died a few years ago (on a trail run), and I ended up replacing with whatever standard cheap one (I think its all Airtex) that is found everyone under different names. I carry a little electric fuel pump with a hot wire and some hose adapters ready to go the tool box to get me home. I don't have a lot of confidence in the longevity of that mechanical pump although its worked fine for 4-5 years so far.
     
  4. Mar 30, 2020
    Norcal69

    Norcal69 Out of the box thinker 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Northern California
    Joined:
    Sep 6, 2014
    Messages:
    3,549
    I've always had good luck with Carter brand fuel pumps. CARTER M4512 is what I'm running.
     
    FinoCJ likes this.
  5. Mar 31, 2020
    Tom_Hartz

    Tom_Hartz Member 2024 Sponsor 2023 Sponsor 2022 Sponsor

    North Carolina
    Joined:
    Apr 9, 2014
    Messages:
    478
    View attachment 56121
    Look up "Standard FV11".
    This is what I run with two tanks and return lines. It works great.
     
  6. Mar 31, 2020
    Norcal69

    Norcal69 Out of the box thinker 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Northern California
    Joined:
    Sep 6, 2014
    Messages:
    3,549
    I had a bad experience with an electric fuel switching valve....... 110 degree day, side of the road laying under the jeep swapping hoses around because the silenoid went bad. Burnt my forearm really bad on the muffler, then gas ran over the fresh burn when I swapped the hoses. I currently run a 3 port valve for my 2 tanks without a return. If I were to add a return line I would change to this 6 port valve. https://www.amazon.com/GROCO-FUEL-VALVE-PORT-FV65038/dp/B00YMZ3YZM

    [​IMG]
     
    Bowbender and Tom_Hartz like this.
  7. Mar 31, 2020
    Steve's 70-5

    Steve's 70-5 Active Member

    Louisville, Ky
    Joined:
    Nov 12, 2009
    Messages:
    1,381
    There is a fuel return on your v-6. Right? How would TBI change things
     
  8. Mar 31, 2020
    FinoCJ

    FinoCJ 1970 CJ5 Staff Member

    Bozeman, MT
    Joined:
    Jul 18, 2013
    Messages:
    5,593
    Kyle does not run a return line as is, even with the v6. I am not sure when the production year break occurred, but you can get mechanical fuel pumps for the v6 with and without a return port.
     
  9. Mar 31, 2020
    Norcal69

    Norcal69 Out of the box thinker 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Northern California
    Joined:
    Sep 6, 2014
    Messages:
    3,549
    I am not running a fuel return. The TBI and other injection setups run a return so that the pump stays cooler and the pump can run a constant speed.
     
  10. Mar 31, 2020
    Tom_Hartz

    Tom_Hartz Member 2024 Sponsor 2023 Sponsor 2022 Sponsor

    North Carolina
    Joined:
    Apr 9, 2014
    Messages:
    478
    I like that better. Looks like I may make a change one day.

    Thanks...
     
  11. Mar 31, 2020
    Norcal69

    Norcal69 Out of the box thinker 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Northern California
    Joined:
    Sep 6, 2014
    Messages:
    3,549
    These days you just cant use enough protection.....
    Not really necessary but it should prevent any future damage.

    [​IMG]
     
    Muzikp, Rich M. and ITLKSEZ like this.
  12. Mar 31, 2020
    Norcal69

    Norcal69 Out of the box thinker 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Northern California
    Joined:
    Sep 6, 2014
    Messages:
    3,549
    I'm not anti electronics..... but the less things to leave you stranded the better.....IMO.... A brand new off the lot JK is more likely to break down than my Jeep.
    If I ever changed to fuel injection I would most definitely carry a spare fuel pump....
     
    Tom_Hartz likes this.
  13. Mar 31, 2020
    givemethewillys

    givemethewillys Been here since sparky ran it. 2022 Sponsor

    New Kent, VA
    Joined:
    Jun 21, 2005
    Messages:
    1,998
    I like that manual fuel switch... it seems like the only way it could go wrong it through corrosion, which would probably be a very remote possibility.
     
    Tom_Hartz likes this.
  14. Apr 1, 2020
    Steve's 70-5

    Steve's 70-5 Active Member

    Louisville, Ky
    Joined:
    Nov 12, 2009
    Messages:
    1,381
    How much fuel is returned to the tank when running? I know RPM will have have bearing on it. Any guesses
     
  15. Apr 1, 2020
    Norcal69

    Norcal69 Out of the box thinker 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Northern California
    Joined:
    Sep 6, 2014
    Messages:
    3,549
    I really have no idea. The return line is always smaller than the feed.
     
  16. Apr 1, 2020
    FinoCJ

    FinoCJ 1970 CJ5 Staff Member

    Bozeman, MT
    Joined:
    Jul 18, 2013
    Messages:
    5,593
    totally get it...I run the electric FSV11 that was posted and its not as simple and clean as I would like (but it does work nicely)...my one thought about being stranded: the valve is set-up so that when the switch is off, or if the solenoid malfunctions electrically, the valve goes to its 'default' position which keeps the 'primary fuel circuit open'. I set mine up so that the default 'primary' circuit (think its labelled '1' or 'A' on the switch ports) uses the larger rear tank as that is what I use for most daily driving etc. The switch is only activated when 'on' (electricity applied) and that moves mine to the 2ndary tank (underseat in my case). I figure if somehow the switch died - I could always siphon fuel from the underseat tank to the rear tank if needed. And absolute worst case scenario of a failed switch that wouldn't allow fuel flow - its pretty easy to bypass with 6inches of fuel line with nipple (I carry that as part of my spare fuel pump set-up)....just food for thought...I really wanted to have fuel return lines so that is why I did it the way i did - had issues with vapor lock on hot days at high elevation when i first got it, or so I thought I did, but when the fuel pump died that might really have been the first sign of a dying pump....
     
    Tom_Hartz likes this.
  17. Apr 1, 2020
    FinoCJ

    FinoCJ 1970 CJ5 Staff Member

    Bozeman, MT
    Joined:
    Jul 18, 2013
    Messages:
    5,593
    Doug has a dual tank set-up, and while he has a 3-port manual valve to switch the supply line, he kept a single return line going to the same tank (underseat I believe). He runs the underseat tank first then switches to the rear tank....he has mentioned that at idle speed (common with trail riding) that he can over flow the underseat tank (10gal) from the return line on his rear tank (15gal)....in other words, in that unique, low rpm situation, more than 50% of the fuel is returning....
     
    Muzikp likes this.
  18. Apr 2, 2020
    Tom_Hartz

    Tom_Hartz Member 2024 Sponsor 2023 Sponsor 2022 Sponsor

    North Carolina
    Joined:
    Apr 9, 2014
    Messages:
    478
    I added return lines for vapor lock also. When we moved from So. Cal. to NC the problem started. I run an electric pump.
     
  19. Apr 5, 2020
    Norcal69

    Norcal69 Out of the box thinker 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Northern California
    Joined:
    Sep 6, 2014
    Messages:
    3,549
    I’m thinking this was a bad weld on my front drive shaft.......

    EE0CD830-FA75-4EFA-AFDA-46A5A9E68EB7.jpeg

    E0862392-D2AF-496B-8190-C235D4462327.jpeg

    C79AE4C4-5809-4C41-A7D7-17C1DB7D3B10.jpeg
     
  20. Apr 5, 2020
    Muzikp

    Muzikp Active Member

    Sacramento Ca.
    Joined:
    Sep 27, 2016
    Messages:
    1,450
    ACK!!! That's less than ideal.
     
New Posts