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Thread: 2008 Jeep JK 3.8 Sprintex

  1. #1
    Potential Tuner
    Join Date
    Mar 2023
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    2008 Jeep JK 3.8 Sprintex

    Since I didn't see anything here for this, figured I'd share this.
    2008 Jeep JK 3.8L with Sprintex Supercharger
    This is the tune loaded from a Diablo Tuner with Sprintex Tune, then read back off ECU with HP Tuners.
    2008JK_Sprintex00.hpt

    Can't buy this supercharger kit new anymore for 2007-2011 3.8L Jeep JK
    So had to find used one, then find all the correct parts that where missing.
    Last edited by vial; 07-01-2023 at 04:13 PM. Reason: Rambled off at the end

  2. #2
    Potential Tuner
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    Mar 2023
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    Here is parts list from Sprintex JK 3.8 Packing List.pdf

    Injectors are Bosch #
    stock are 0280158119, 21lb/hr)
    Sprintex Kit requires 0280158193 30.7lb/hr

    Requires a 2bar SRT MAP sensor 05033224AB

    I'm still trying to figure out what Boost bypass valve actuator I can use as a replacement. Maybe something adjustable.
    Think maybe diaphram is leaking. Getting a strange surging at between 0 - 7 inHg. and only seeing about 3psi boost, would like to see 5psi.

  3. #3
    Tuner
    Join Date
    Dec 2006
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    Birmingham, Alabama
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    you need to turn Baro Leanring off.