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Thread: Tuning for 90hp injectors ?

  1. #21
    Lifetime Member DoghouseDiesel's Avatar
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    Once you bring in that rail pressure a little faster, you should notice it smooth out a bit and your smoke should taper off.

    I'm not talking a huge ramp here either. I'm talking 2 - 4k psi between 1000 - 2000 RPM.

    Your idle RPM rail pressure should be around 6800 - 7200, don't mess with that. Once you put it in gear it should come up to around 8500 - 9000.

    1207 HP / 1612 TQ

  2. #22
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    The reason i want more bottom end is i feel like it lacks there a little when towing. I would like to get it moving a bit better starting out with my manual.
    06 2500 SLT 4x4 , G56, 105,000 miles, 2nd exhaust manifold, 2nd gen air intake horn, SBC 3600 DD, I. I. 90HP Sticks, straight pipe, manual high idle mod, custom air intake , and pretty much everything else engine wise is stock... LEARNING EFI LIVE

  3. #23
    Lifetime Member DoghouseDiesel's Avatar
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    Am I missing something or is your truck running a stock turbo?

    1207 HP / 1612 TQ

  4. #24
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    It does right now , but i have a 63/68 from ED to put on. been delaying till the injectors were replaced.

    And cam for that matter.
    06 2500 SLT 4x4 , G56, 105,000 miles, 2nd exhaust manifold, 2nd gen air intake horn, SBC 3600 DD, I. I. 90HP Sticks, straight pipe, manual high idle mod, custom air intake , and pretty much everything else engine wise is stock... LEARNING EFI LIVE

  5. #25
    Lifetime Member DoghouseDiesel's Avatar
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    Okay, so you're running stock sticks in it right now?

    1207 HP / 1612 TQ

  6. #26
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    No I have the 90's installed yesterday. been driving it around on the stock tune .
    06 2500 SLT 4x4 , G56, 105,000 miles, 2nd exhaust manifold, 2nd gen air intake horn, SBC 3600 DD, I. I. 90HP Sticks, straight pipe, manual high idle mod, custom air intake , and pretty much everything else engine wise is stock... LEARNING EFI LIVE

  7. #27
    Lifetime Member DoghouseDiesel's Avatar
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    Okay, with 90's and a stock turbo, you're really not going to be able to control that smoke without severely limiting the duration. The stock turbo just won't clear those up.

    I'd cut the duration in 30 - 70 mm3 range so that you don't see over 1800 uS until you're up in the 80 - 90 mm3 range until 1800 RPM's or so. Also, keep it it so you're under 800 uS in the 30 - 55 mm3 range until you're over 1400 RPM's.

    Don't wait for the cam to put that turbo on. You'll have no problem lighting that turbo with a stock cam. It'll just be better with a decent cam.

    What have you don't with all your limiting tables?

    1207 HP / 1612 TQ

  8. #28
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    not a thing yet as i wasnt sure where to go with this, till you helped me i was bit clueless.
    06 2500 SLT 4x4 , G56, 105,000 miles, 2nd exhaust manifold, 2nd gen air intake horn, SBC 3600 DD, I. I. 90HP Sticks, straight pipe, manual high idle mod, custom air intake , and pretty much everything else engine wise is stock... LEARNING EFI LIVE

  9. #29
    Lifetime Member DoghouseDiesel's Avatar
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    Okay, those limiters are going to take care of a lot of the response down low, especially the torque limiter table.

    Take a look at the limiting tables and see what "doesn't make sense". If it LOOKS like it would hold back power, it probably is.

    1207 HP / 1612 TQ

  10. #30
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    What about the pilot? With the larger injectors, more fuel will be injected sooner, so I retarded my pilot timing by 2 degrees and pulled back the mm3 from 15-25% to compensate for my 50hp nozzles. Truck runs a lot smoother and a little quieter with these changes. I'm sure the mileage is better since less fuel is in the pilot event. I am wondering what the ideal timing and quantity of the pilot is when tuning without consideration of emissions (mileage, quietness, efficient combustion of the main event, etc).
    06,QC,4X4-ARE top, Bedslide ,EFILive tuned my me and Anarchy, FASS, DTT, ATS 5000 twins, PDR cam, BD IC, Carli/Thuren, Warn Air/Winch, F1 Springs, Studs
    01,QC,4X4-Banks PowerPack, RV275s,PDR35/14, FASS, Carli/Thuren/Lorenz, OnBoard Air, DTT, ARB/Warn

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