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Thread: Gen 3 5.3L ON3 turbo, my first turbo tune, any help

  1. #1
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    Default Gen 3 5.3L ON3 turbo, my first turbo tune, any help

    im working on a XJ cherokee, with a 5.3L/4L60 .. this is my first turbo tune so any help will be great, its my own truck

    -Engine is completely stock
    -Transmission is a 4L60E i got it from monster transmission
    -turbo is a On3 76mm turbo
    -3Bar map sensor ( im runing this one because i already have it and maybe will add more boost later)

    Fuel system:
    -Stock return type fuel rails
    -Ford lightning green injectors
    -Walbro 255 intank fuel pump

    PLANING TO RUN 8-10 PSI of boost

    As this car will be used as offroad, i want it to keep it simpler so i want to run it in custom OS Speed density, in Open Loop, ( No o2s sensors)

    Im working on a 2003 truck tune as a BASE..

    changued the C6301 to 283.5 , Key on engine off shows 101, it has to show that right?

    The other question is about the injectors; i look for the flow rates, on a ford forum they say they are: the lime-green ford lightning(ford motorsport) SVT M112 are 440cc@3.0bar , using this info and the injectors.xls, it shows me : 6.2987 , is that a correct flow rate for this injectors?
    Attached Files Attached Files
    Last edited by 400ss; September 24th, 2014 at 05:29 PM.

  2. #2
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    i found that the injectors flow rate at 58 PSI is: 6.1108
    MY MAP looks to be measuring right

    does my starting base tune looks sane??
    ill be using LM1 wideband, will work on both VE tables. i will start playing with timing then.. does this looks ok? or im totally lost?

  3. #3
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    started the truck, it looks to be working right, idles normal, i changued the values on B3647 and B3649, think im going to control fuel with Power Enrichment..

  4. #4
    Joe (Moderator) joecar's Avatar
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    Quote Originally Posted by 400ss View Post
    i found that the injectors flow rate at 58 PSI is: 6.1108
    MY MAP looks to be measuring right

    does my starting base tune looks sane??
    ill be using LM1 wideband, will work on both VE tables. i will start playing with timing then.. does this looks ok? or im totally lost?
    I calculated 6.1 g/s to 6.2 g/s (depending on the density of gasoline).

    I'll take a closer look at your file (I've been swamped in the last couple of weeks and I'm slowly catching up).

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    Quote Originally Posted by joecar View Post
    I calculated 6.1 g/s to 6.2 g/s (depending on the density of gasoline).

    I'll take a closer look at your file (I've been swamped in the last couple of weeks and I'm slowly catching up).


    THank you very much, really..

    I used 6.1094, started the truck and it idles nice and revs ok too.. next step i will install the cold side piping to start tuning VE tables.
    want to push 10psi but will see if the fuel pump provides enough fuel

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