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Thread: Dual cp3 tuning with Y harness

  1. #1
    Tuner MAIDENCR's Avatar
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    Dual cp3 tuning with Y harness

    Anybody have some hint to tune a dual cp3 with Y harness? Tried some stuff but it always goes up to 26000psi

    Thanks

  2. #2
    Did you double the FCA amperage? That would be the first place to start.
    06 SCLB. ATS stage 6, ATS Twin cp3, s369sxe, Fass 220, Hamilton 188/220, 110# springs, DDP 220's, ARP 425's, Big valve head, .40 over, 12v rods, balanced rotating assembly, Efi-Live etc.. 770hp 1380tq Tenacity Tuning

  3. #3
    Tuner MAIDENCR's Avatar
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    Max dc current in stock tune os 1,700...tried to enter 3,400 and a warning came up...the it only enter 3,000
    03 cummins,100hp nozzle,dual cp3,s468/87 or sxe472

  4. #4
    when does it go to 26k rail?
    06 SCLB. ATS stage 6, ATS Twin cp3, s369sxe, Fass 220, Hamilton 188/220, 110# springs, DDP 220's, ARP 425's, Big valve head, .40 over, 12v rods, balanced rotating assembly, Efi-Live etc.. 770hp 1380tq Tenacity Tuning

  5. #5
    Tuner MAIDENCR's Avatar
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    At idle
    03 cummins,100hp nozzle,dual cp3,s468/87 or sxe472

  6. #6
    Have you logged FCA current and duty cycle at idle?
    06 SCLB. ATS stage 6, ATS Twin cp3, s369sxe, Fass 220, Hamilton 188/220, 110# springs, DDP 220's, ARP 425's, Big valve head, .40 over, 12v rods, balanced rotating assembly, Efi-Live etc.. 770hp 1380tq Tenacity Tuning

  7. #7
    Tuner MAIDENCR's Avatar
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    Dont have duty cycle but current is 1.026mA
    03 cummins,100hp nozzle,dual cp3,s468/87 or sxe472

  8. #8
    for some reason the ecm is asking for full rail. If it was at 3000 and still at 26k then it would be an issue. Is that the only change you made, was put in the splitter and then try to double fca amperage? Something doesn't seem right.
    06 SCLB. ATS stage 6, ATS Twin cp3, s369sxe, Fass 220, Hamilton 188/220, 110# springs, DDP 220's, ARP 425's, Big valve head, .40 over, 12v rods, balanced rotating assembly, Efi-Live etc.. 770hp 1380tq Tenacity Tuning

  9. #9
    Tuner MAIDENCR's Avatar
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    In fact i have some tuning by a professionnal tuner....but truck smoke a lot and he doesnt seams to want to tune it better..im sick to pay for a tuning and dont have full support...other tuner i had before have clean tune but take a mount or so to answer if he answer...so wanna try some tuning...you pay arround to 400$ us...2-3 retune then they let you with what you have...
    03 cummins,100hp nozzle,dual cp3,s468/87 or sxe472

  10. #10
    It is unfortunate how some of the "pro" tuners are, sorry to hear of your troubles. Did you tell the tuner about the splitter? Maybe he can send you a new tune.
    06 SCLB. ATS stage 6, ATS Twin cp3, s369sxe, Fass 220, Hamilton 188/220, 110# springs, DDP 220's, ARP 425's, Big valve head, .40 over, 12v rods, balanced rotating assembly, Efi-Live etc.. 770hp 1380tq Tenacity Tuning

  11. #11
    Tuner MAIDENCR's Avatar
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    truck have the "appropriate" tuning for dual cp3....but at some tps level and acceleration it smoke a lot...but my tuner say i need fuel to light the turbo...but it spool easier and faster when you go easy on throttle...
    03 cummins,100hp nozzle,dual cp3,s468/87 or sxe472

  12. #12
    Tuner MAIDENCR's Avatar
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    Got it idling today...but pressure go way to high with a blip of the throttle...

  13. #13
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    Quote Originally Posted by MAIDENCR View Post
    Got it idling today...but pressure go way to high with a blip of the throttle...
    http://fleeceperformance.com/dodge/2...2-harness.html

    This might help?

  14. #14
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    Keep adding amperage if it continues to spike in the range where it is spiking.

  15. #15
    Tuner MAIDENCR's Avatar
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    Its the Y harness i have...

    Will try add some amp

  16. #16
    Tuner in Training
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    On the DC to Current table, start with multiplying each value by 1.7. Adjust from there. eg. 1700 X 1.7 = 2890.

  17. #17
    Tuner MAIDENCR's Avatar
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    Did another test today...idle nice and smooth...i can drive it....but when accelerating the rail pressure "bounce" like shuttering...any idea?

  18. #18
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    Quote Originally Posted by MAIDENCR View Post
    Did another test today...idle nice and smooth...i can drive it....but when accelerating the rail pressure "bounce" like shuttering...any idea?
    I had that before, after getting an II 85% over cp3 and 120hp injectors and running a smarty s-06 before custom tuning started coming out for it. Once custom tuning started coming out, Smoothing out rail pressure where I had those shuttering spikes occurred in the rp map cleared it up. I only had it in certain parts of the map.

  19. #19
    Tuner MAIDENCR's Avatar
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    Did another test today.....but when i let off the throttle my rail pressure drop below the desired? any hint? here is the datalog to see it

    im unable to add a picture.....why?
    Last edited by MAIDENCR; 09-14-2018 at 08:09 PM.
    03 cummins,100hp nozzle,dual cp3,s468/87 or sxe472

  20. #20
    Tuner MAIDENCR's Avatar
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    Attachment 83459

    here we go
    03 cummins,100hp nozzle,dual cp3,s468/87 or sxe472