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Increasing injector line pressure.

Discussion in 'Turbo Diesel Forum' started by furchaser, May 21, 2011.

Page 1 of 2

  1. furchaser

    Joined:
    Sep 15, 2007
    I have heard of people restricting the return line to increase injector pressure but was wondering if anyone has actually done this ...
    I am trying to get a bit more fuel out of the pulling tractor and already have an external pump feeding the injector pump that is pretty much maxed . Could this be done in the same way as a fuel pressure regulator ? :huh:
    Some thoughts ?
     
    furchaser, May 21, 2011
    #1

  2. Mnlx

    Joined:
    Sep 20, 2009
    when I bought my Ford 8600 it was setup with a valve in the return, and was closed completely (no return fuel). I knew the owner, and had seen the tractor pull many times before I bought it, and it worked well. I then changed the system, and regulated it to 50psi, and didnt seem to lose any fuel delivery....... but I had to run twin pumps to maintain the 50 psi.
     
    Mnlx, May 21, 2011
    #2

  3. wantabe

    Joined:
    Oct 12, 2010
    increasing fuel transfer / pre charge fuel pressure will help
    either increase relie on the transfer pump,
    increase pump manifold return poppet ( the outlet valve that holds fuel in the pump)

    what sort of system is it?
    common rail, inline, ve/vx pump ???
     
    wantabe, May 21, 2011
    #3

  4. furchaser

    Joined:
    Sep 15, 2007
    furchaser, May 21, 2011
    #4

  5. furchaser

    Joined:
    Sep 15, 2007
    furchaser, May 22, 2011
    #5

  6. wantabe

    Joined:
    Oct 12, 2010
    CAV diesel pump
     
    wantabe, May 22, 2011
    #6

  7. wantabe

    Joined:
    Oct 12, 2010
    they only have a lift pump, that runs on the cam ..mounts on the side of the block ??

    1. u tried increasing max fuel setting on the gov ?
    2. lighten the gov springs, to allow more fuel soon in rpm ?
    3. increase max rpm, before fuel shuts off ?
     
    wantabe, May 22, 2011
    #7

  8. furchaser

    Joined:
    Sep 15, 2007
    This pump I did not build myself it was done a few years ago at Kingston Diesel .. He said he got what he could out of it ..
    I'm not entirely sure what was done , or not done .. It was built to run N/A and did a dam fine job of it until I stuck the turbo on ..lol
    It still pulls really good but I would just like to get a little more fuel out of the injectors... There is a external electric pump feeding the injector pump and this is why I thought about maybe putting a restrictor in the return line to bump it up a bit.. I'm looking around now to find some kind solenoid type valve that will turn on when the Meth hits at 6psi and close down the return line.... Or I'm just retarded . :stupid:
     
    furchaser, May 22, 2011
    #8

  9. furchaser

    Joined:
    Sep 15, 2007
    Yes basically.
     
    furchaser, May 22, 2011
    #9

  10. wantabe

    Joined:
    Oct 12, 2010
    ok,
    more pressure in, ( called transfer or charge pressure)..will help fill the pumping chamber of the plunger inthe fuel pump
    the more rack travel / governor max fuel setting, will give more fuel being injected to the motor
    the turning off of return fuel will cause other problems , like cracking/ spliting the injection pump itself
     
    wantabe, May 22, 2011
    #10

  11. wantabe

    Joined:
    Oct 12, 2010
    more injection pressure, will basicly just make a cleaner burn / more atomization of the diesel
    u need more volume
     
    wantabe, May 22, 2011
    #11

  12. furchaser

    Joined:
    Sep 15, 2007
    Okay , that makes sense ... I'm not really sure where to go from here then. >:(
     
    furchaser, May 22, 2011
    #12

  13. wantabe

    Joined:
    Oct 12, 2010
    methanol ?
    is the injecter pump opened up, rack wise?
    more turbo ?
     
    wantabe, May 22, 2011
    #13

  14. Mnlx

    Joined:
    Sep 20, 2009
    but doesnt add any fuel delivery....... correct? just keeps the pump supplied with fuel.

    This is what I worried about, and why I changed my setup.
     
    Mnlx, May 22, 2011
    #14

  15. furchaser

    Joined:
    Sep 15, 2007
    Sure could use some help here .. lol
     
    furchaser, May 22, 2011
    #15

  16. wantabe

    Joined:
    Oct 12, 2010
    sorry, im just a dumb person...lol
    i know nothing
     
    wantabe, May 22, 2011
    #16

  17. furchaser

    Joined:
    Sep 15, 2007
    lol .. hardly .. :2thumbs:
    I guess I'll pull the pump and have a look and see what they did to it and if there is anymore left in it...
    I don't want to turn up the boost until I can get some more fuel to it. First pull of the summer is next weekend and I doubt if time will permit any tinkering so we'll just run what we brung.
     
    furchaser, May 23, 2011
    #17

  18. Mnlx

    Joined:
    Sep 20, 2009
    is this the Stanadyne/ Roosa Master you were repairing in an earier post?
     
    Mnlx, May 23, 2011
    #18

  19. furchaser

    Joined:
    Sep 15, 2007
    No .. it is a rosamaster but it's on the little D282 .. I have never opened this one up to see what was done to it.
     
    furchaser, May 23, 2011
    #19

  20. furchaser

    Joined:
    Sep 15, 2007
    Batteries shit out on the only camera we had so I didn't get the video of killing the 6500 lb class .... We decided to load it for 8500 lb just to see how it did .. ( they didn't bother with a 7500 lb :huh: ) The poor thing gave it's all and surprised quite a few in the crowd that were pulling for the under dog .... lol
    I think the smallest engine in that class is a 425 cid and up over 500 cid and we only lost by 20 feet. not bad for a 282 cid.. :2thumbs:

    &feature=player_embedded[/url]
     
    furchaser, May 31, 2011
    #20
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