need some blown hat injection help pleaseeeee - Reply to Topic

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Topic Review (Newest First)

  • 04-24-2008, 09:10 AM
    t-bag'n

    Air

    Nobody has brought up air density. Depending on where and what time of year it is your corrected altitude could be way out.. Are you guys checking corrected altitude?????
  • 04-22-2008, 03:41 PM
    IMPATIENT 1
    we thru everything again and the springs are where they should be, valves in the bypasses are facing the right direction. the boat should be water test worthy in the next 10days so i'm hoping it was all to much cylinder pressure to light the shit plugs he had in it.
  • 04-19-2008, 11:50 PM
    IMPATIENT 1
    Quote Originally Posted by Fiat48 View Post
    Take pics if you have questions.
    Poppet faces the pressure.
    Make sure main bypass check did not get swapped with high speed check.
    Main bypass (light spring) is the one you see in the picture.
    High speed is the other one you told me about that is plumbed on the injector hat inlet fuel line. That's the heavy spring.
    printed all this off to carry with me tommorrow, i'll let ya know how it turns out. thanx man
  • 04-19-2008, 11:39 PM
    Fiat48
    Take pics if you have questions.
    Poppet faces the pressure.
    Make sure main bypass check did not get swapped with high speed check.
    Main bypass (light spring) is the one you see in the picture.
    High speed is the other one you told me about that is plumbed on the injector hat inlet fuel line. That's the heavy spring.
  • 04-19-2008, 11:22 PM
    IMPATIENT 1
    thanx for the help fiat, i'll go by his place tommorrow and personally take some pics, and take apart the bypass valves and take a look, see if their plugin themselves shut. that could be his trouble, the fuel went bad, he took it apart and put it back together with the high speed valve backwards, giving it too much fuel when the meter valve is calling for wot.
  • 04-19-2008, 11:02 PM
    IMPATIENT 1
    Quote Originally Posted by Fiat48 View Post
    Very easy to put them in backwards. Jet can is that brass looking thing in the picture. It's just a check valve....but it flows one way only.
    oh, ok. so the bypass has a spring inside pointed towards the pressure, and the spring should be pushing up on the valve from the bottom, or bypass exit. so if the valve(i'm assuming a ball type?) is put in frt of the bypass exit, the valve would shut off the exit and nothing would leave thru it. kinda set-up like a header t-valve.
  • 04-19-2008, 10:56 PM
    Fiat48
    Very easy to put them in backwards. Jet can is that brass looking thing in the picture. It's just a check valve....but it flows one way only.

    You can also use a loop line for the fuel shutoff. But don't use a loop line for the main or the high speed.
    http://www.goodvibesracing.com/inlet_loop_lines.htm
  • 04-19-2008, 10:53 PM
    IMPATIENT 1
    Quote Originally Posted by Fiat48 View Post
    That should be the high speed bypass. It will be on the incoming line. Should have a stiff spring and a jet in it. Prolly 65lbs or more and 70 or so jet. That would be the line you could tie in with the fuel shutoff line.

    Another thought. Make sure the jet cans face the right way. The poppet valve toward the pressure. If put in backwards...no fuel bypasses. This might be your gremlin.
    thanx for helping out, that tie'n the lines will sure make this a smoother and cleaner plumbing job, he's tryin to do it in all stainless hardline, or braided where he has too.

    jet cans? is that on the meter block? he has messed with the system alot after the issue reared its head, and may have caused an issue when he cleaned things, might have put them in backwards?
  • 04-19-2008, 10:46 PM
    Fiat48
    That should be the high speed bypass. It will be on the incoming line. Should have a stiff spring and a jet in it. Prolly 65lbs or more and 70 or so jet. That would be the line you could tie in with the fuel shutoff line.

    Another thought. Make sure the jet cans face the right way. The poppet valve toward the pressure. If put in backwards...no fuel bypasses. This might be your gremlin.
  • 04-19-2008, 10:33 PM
    IMPATIENT 1
    can't get the pic to post without it goin to a log in page

    i'm lookin at a pic of his hat and i see something right behind the block like another bypass coming offa his pressure line to the inj distribution block. it has a bypass hose coming outta it. same metering block set-up, just has that other bypass coming offa the line to the injector feed line.
  • 04-19-2008, 10:12 PM
    IMPATIENT 1
    the pic you posted up looks about right for his, let me look thru my computer and see if i have a pic of his.

    the system diagram they sent with his injection setup is what he plumbed in last time on the shovelnose and it worked great and was never changed up. we're just limited by saddle tanks now, so we're gonna prime and transfer with the lh tank, run the boat offa the rh tank that has 2 return spots, and now the new 1/2 bung he had installed at the bottom rear of the tank. the diagrahm shows 3 bypasses, i'll look for a pic to post.
  • 04-19-2008, 10:04 PM
    Fiat48
    Yeah well....constant flow is so simple it shouldn't work but it does.

    Conventional enderle plumbing:


    The main jet screws into the front of the main metering body. The main bypasses fuel any time the motor is running. The fuel comes out that brass check valve (should be a 2 lb check) and returns to the tank.
    So...there is one return line.

    Now if you have a high speed...that is just another bypass that is plumbed into your main supply line. That's just another brass can with a stiffer spring in it...prolly 65 lbs or so. System pressure opens that and fuel goes back to the tank.
    So that is the 2nd return line.

    A third return line would be a fuel shutoff line...and if needed you can tie the high speed return line with that if you only have 2 tank bungs.

    That is...if your are plumbed conventional. There are other ways the system can be plumbed. Check that yours is plumbed this way and if not....tell me or pictures of how it is plumbed.
  • 04-19-2008, 09:50 PM
    IMPATIENT 1
    man, i'm honestly just learnin mechanical injection. injection set-ups that you can't watch fuel pressures confuses the hell outta a person who makes a living watching high fuel pressured f.i. motors. i understand they work by volume and not pressure but the bypasses and stuff are still kinda a mystery to me. can i have him call you sometimes? he has the system drawes out on paper that good vfibrations or enderle send out with the stuff.
  • 04-19-2008, 09:47 PM
    Fiat48
    Thinking you have too much fuel (closing throttle picks up) or can't light it under load.
    Did you check the high speed bypass?
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