Results 1 to 7 of 7

Thread: Getting fuel to additional fuel injectors

  1. #1
    Join Date
    Oct 2003
    Location
    Raleigh, North Carolina
    Posts
    81
    My Cars
    2003 M5

    Getting fuel to additional fuel injectors

    Im running some secondary injectors for my turbo M20 and am looking for the best way to run a hose from the fuel rail, to the fuel injector top...I'm wary of pushing a hose on top and clamping it as 45 PSI is a lot for a clamp to endure...is there a special fitting somewhere that will fit the top of the fuel injector?
    2003 M5

  2. #2
    Join Date
    Oct 2003
    Location
    Kansas City USA
    Posts
    567
    My Cars
    BMWs 85 shark & 92 M-Tech Cabrio

    No line hookup but an alternative

    Two issues

    1. Why not use the cold start valve.

    2. Why not use a Cartech RRFPR and use the present injectors.

    Here is a link to the fact that all the OE injectors have a 35% reserve that is not used.

    http://www.bsmotor.com/cgi-bin/bsmot...&ant=6&pros=65

    Later,
    <img src="http://kcrealtime.com/dyno-max_900_hp.gif">

  3. #3
    Join Date
    Oct 2003
    Location
    Raleigh, North Carolina
    Posts
    81
    My Cars
    2003 M5
    (sigh) i went through this on the other forums...ive made my mind up on how to do it.
    2003 M5

  4. #4
    Join Date
    Feb 2001
    Location
    Gallatin, TN
    Posts
    4,058
    My Cars
    97 M3/4 - Hurtig/AA TS
    On other applications, where people use aux injectors, I have seen people make a mini-rail to hold the injector.

    Basically imagine a "doorway" made from aluminum, with 2 vertical "columns" going from the housing it would mount to, with a "bridge" connecting the columns. The columns bolt down to the housing you are putting the injector in, and the bridge portion has a bored hole that takes the injector top, and essentially "presses" or holds it in place. Then you need some passages in it and fittings to get fuel in/out.

    How many injectors do you plan to use?

    Steve
    Have you been Screwed?

  5. #5
    Join Date
    Oct 2003
    Location
    Raleigh, North Carolina
    Posts
    81
    My Cars
    2003 M5
    im using 6 injectors, 1 in each intake runner of the M20 intake manifold. I have ordered some fuel rail stock that is going to be used for the fuel rails.
    2003 M5

  6. #6
    Join Date
    Mar 2002
    Location
    VA
    Posts
    3,839
    My Cars
    Recovering Boost Junkie...
    Originally posted by E30godz
    im using 6 injectors, 1 in each intake runner of the M20 intake manifold. I have ordered some fuel rail stock that is going to be used for the fuel rails.
    What are you going to use (what kind of piggy back) to drive these additional 6 injectors?

    If this can wait, I could try to post some pictures of my 6 additional injectors. Since my car is being worked on until Saturday, I wouldn't be able to take any pictures until then though.
    2008 X5 4.8i
    2003 330xi -sold-
    2001 X5 4.4i -sold-
    2001 M5 -sold-
    2001 M Roadster (SCed, Highly modified) -sold-
    2000 M Roadster -sold-
    1995 325is -sold-

  7. #7
    Join Date
    Oct 2003
    Location
    Raleigh, North Carolina
    Posts
    81
    My Cars
    2003 M5
    I'll be using an SMT-6 for the additional fuel injector control. Yea, definitly post the pictures. I drilled and tapped the intake manifold (aluminum) and put some brass compression fittings in, which are basically just some plumbing fittings. The fuel injectors form a VERY tight squeeze inside the fittings so it should work well...cheap too. If you are familiar with the design of the M20 intake manifold , you will notice that if you try to put the injectors at about the same distance away from the cylinder, they dont line up in a straight line. This creates a problem when trying to fit a fuel rail to them. I'll take some pictures soon and show you what i mean. Thanks
    2003 M5

Bookmarks

Posting Permissions

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