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  1. #1
    Established Member Three Rings
    Join Date
    Feb 15 2018
    AZ Member #
    414102
    Location
    Vancouver, WA

    Does anyone have data on using upgraded/additional heat exchangers?

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    I always see people talking about using heat exchanger upgrades etc

    As I understand it the supercharger intercooler and everything all uses the same coolant.

    If I check my coolant it is always over 70*C

    The engine will decrease performance if IAT over 70*C

    How on earth could this coolant lower IAT


    Also when I drive hard or not hard, my coolant temp is basically always the same... Within 1-3*C



    I want to see someones data on IAT, Coolant Temps pre and post heat exchanger.

    Does this upgrade even do anything?

  2. #2
    Veteran Member Four Rings theweebabyseamus's Avatar
    Join Date
    May 12 2008
    AZ Member #
    28667
    Location
    Bay Area, CA

    Cant tell if you're serious, but if you are there is a ton of data that's easily searchable.

  3. #3
    Senior Member Two Rings Sick S4's Avatar
    Join Date
    Apr 14 2016
    AZ Member #
    371845
    Location
    Charlseton SC

    Wow there is a lot of data and discussion about this. Please search and literally 1000s of posts will show up.

    And yes upgrading your front HX does wonders. It doesn’t eliminate the heat issue entirely but there are other ways of increasing your ability to cool you IAT... Chiller Killer, completely divorcing the super charger cooling circuit, injecting methanol at the TB, etc.


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  4. #4
    Veteran Member Four Rings bhvrdr's Avatar
    Join Date
    Jul 21 2004
    AZ Member #
    2873
    Location
    South Florida

    Your engine coolant temp is not the same as the sc coolant temp even when not divorced. There is very little mixing

    2010 Audi A4 Avant 6AT - Unitronic Tuned - Bone Stock Hardware
    13.665 at 97.71mph - 93 octane - +1250DA
    Gone:
    2013 Audi S5 DSG - Unitronic Stage 2++ ECU & TCU, 3.17pr, Revo Charge Cooler, CTS Turbo Intake, ST60 380mm BBK
    11.482 at 118.70mph - 97 octane - +465DA
    --------------------------
    2016 A6 -- 2015 S4 -- 2009 A4 -- 2004 S4 -- 2006 A4 -- 2003 A4 -- 2000 A4



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