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Thread: Tips & Tricks: Things you've learned while exploring EFI Live on the Cummins

  1. #21
    Lifetime Member Dmaxink's Avatar
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    Nice follow up Les, just goes to show every truck is different. Ours loves 28*. At 30* we got timing rattle and low throttle response (flame was put out)...mileage did well from 28* and bumped fuel pressure in the cruising range.
    -Kory

    I'm out of ideas? Nah trick... When in doubt, 0xFFFF it out!

    http://www.PPEI.com/

  2. #22
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    Quote Originally Posted by DoghouseDiesel View Post
    Here's another for ya....

    The question was brought up about turning off the post injection event.

    What most people are seeing is a loss in HP when you do this.

    Here's why....

    Above 2800 RPM's the ECM reduces the total number of degrees past TDC that the main injection event can last. You go from 22* past TDC down to 14* at 4200 RPM's.

    This is table C7001, Injection Shutoff vs RPM. It's under the Main Injection tab.

    Bring these up and you can kill the post injection event and stretch the main injection event.

    I was thinking about this exact table the other day, just hadn't gotten around to trying it yet. Hopefully I can try it tomorrow. Kind of got out of the testing new things for a while, but I'm getting a little more excited about it again. Has the fuel drop off after 2800 RPMs been figured out yet? Also, what rail pressure do you run on stock trucks?
    '06 2500 Cummins 4x4, Billet Trans, Airdog 150, working on tuning with EFI Live!

  3. #23
    Lifetime Member DoghouseDiesel's Avatar
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    On a stock truck, you want to limit the rail presssure to NO MORE than 165.5 MPa; that's 23,997 psi.

    The rail pressure relief valve opens at approx 24,400 psi.

    1207 HP / 1612 TQ

  4. #24
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    Nevermind what I said in the above post.. looks like the tune I got already had the last 2 up to 22 and 25. I'm still dropping off a little fuel at 2800. Can't wait to get that fixed.
    '06 2500 Cummins 4x4, Billet Trans, Airdog 150, working on tuning with EFI Live!

  5. #25
    Junior Member CIDRAUGHN's Avatar
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    Has anyone had time to see if bringing up the injection shut off vs. rpm table to 22.0 degrees has made a difference?
    06 Dodge RCLB 2500 5.9L Hamilton, Maxxspool, Wicked Diesels, Bullseye Power, Industrial Injection, South Bend Clutch, Amsoil, K&N, ARP,EFILive, T&C Diesel, ATS, GDP...

  6. #26
    Lifetime Member 2007 5.9's Avatar
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    Quote Originally Posted by CIDRAUGHN View Post
    Has anyone had time to see if bringing up the injection shut off vs. rpm table to 22.0 degrees has made a difference?
    Has made no difference on the 4 trucks I've worked on.

    ~Les
    Les Szmidt
    2007 5.9 Dodge Ram
    2014 Ram 3500 Aisin tuning Emissions Equipped
    EFI Live Cummins BETA Tester
    Silver Bullet Tuning
    silverbullettuning@gmail.com
    www.youtube.com/ljszmidt
    http://www.facebook.com/SilverBulletTuninig

  7. #27
    Lifetime Member DoghouseDiesel's Avatar
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    Les,

    Did any of them have decent size cams in them?

    Be interesting to see, as the stock cam is pathetic above 2800.

    I'm gonna strap mine and a customers back down next Saturday. His is a mild 181/210 cam, mines a 188/220....we'll see if it helps at all with the bigger cams.

    1207 HP / 1612 TQ

  8. #28
    Lifetime Member 2007 5.9's Avatar
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    Quote Originally Posted by DoghouseDiesel View Post
    Les,

    Did any of them have decent size cams in them?

    Be interesting to see, as the stock cam is pathetic above 2800.

    I'm gonna strap mine and a customers back down next Saturday. His is a mild 181/210 cam, mines a 188/220....we'll see if it helps at all with the bigger cams.
    3 of the 4 have 181/210 cams....

    ~Les
    Les Szmidt
    2007 5.9 Dodge Ram
    2014 Ram 3500 Aisin tuning Emissions Equipped
    EFI Live Cummins BETA Tester
    Silver Bullet Tuning
    silverbullettuning@gmail.com
    www.youtube.com/ljszmidt
    http://www.facebook.com/SilverBulletTuninig

  9. #29
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    the one i tried it on ran a lot better afterwards, but i changed a lot of other stuff too, inlcuding the boost sensor rescaling which unlike most i changed the voltage axis table to be a straight diagonal line as well. also changed axis tables on all relevant parameters to be linear up to 4600RPM. I'll try changing the injection shutoff table only back to say 10 degrees throughout and see what happens

  10. #30
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    Quote Originally Posted by CIDRAUGHN View Post
    Has anyone had time to see if bringing up the injection shut off vs. rpm table to 22.0 degrees has made a difference?
    Moving it up past 22 degrees has been detrimental. LOL

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