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  1. #1
    Veteran Member Three Rings
    Join Date
    May 11 2014
    AZ Member #
    218710
    Location
    United States

    Need help. Should the divorced coolant system reservoir be vented or not

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    I divorced my supercharger coolant circuit and added a heat exchanger and little reservoir. My question is should that little reservoir be vented or non vented. It looks like in the awe cold front kit, their reservoir is non vented but I don't know for sure. Let me know
    Current: 2018 Audi Exclusive Nogaro Blue RS3 w/Unitronic Stage 1+ E85 ECU and Stage 2 TCU, Water/Meth Injection, Black optics, Tech, Dynamic, Drivers Assistance, RS Design Packages, Carbon Inlays, Carbon Mirror

    Past: 2014 Black S4 DSG/1999 Eclipse GSX

  2. #2
    Senior Member Three Rings xpoweruk's Avatar
    Join Date
    Feb 05 2016
    AZ Member #
    368290
    Location
    UK

    I doubt it.
    The S/C coolant circuit should never be at a point that it is about to boill
    Custom stacked chargecooler
    revo Stage dual pulley with revo intake
    Milltek ValveSonic Exhaust Q5 Brembo 4 Pots
    18x9 Wolfrace ProLite alloys
    Eibach rear ARB & Eibach springs

  3. #3
    Veteran Member Three Rings
    Join Date
    Mar 13 2013
    AZ Member #
    111256
    Location
    Chicago Western burbs, Il

    Quote Originally Posted by hckymstr19 View Post
    I divorced my supercharger coolant circuit and added a heat exchanger and little reservoir. My question is should that little reservoir be vented or non vented. It looks like in the awe cold front kit, their reservoir is non vented but I don't know for sure. Let me know
    It is not.

    '21 Atlas 2.0 AWD, Stg1 93/Stacked JB4 E25, Eibach Springs, AFE Catback
    '18 mk7.5 Golf R STG 2 E30, TCU, IC, Milltek DP/HFC, AW SwitchPath
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    '08 R32 UM ECU/DSG, Schrick 268/264,Milltek Headers/HFC, Corsa Catback , RNS 315/RVC, PolarFis

  4. #4
    Veteran Member Four Rings
    Join Date
    Jan 26 2015
    AZ Member #
    311551
    My Garage
    2017 XC90, a workbench
    Location
    CO

    Don't need to
    -------
    2018 S6 - stock for now
    2014 S6 - Stage 3 - Gone
    2013 S4 - Dual Pulley e85 - Gone

  5. #5
    Veteran Member Three Rings
    Join Date
    May 11 2014
    AZ Member #
    218710
    Location
    United States

    Quote Originally Posted by Hofahome View Post
    Don't need to
    Great thanks alot guys. And hofahome, I just finished my setup tonight with the same heat exchanger you used. I'm going to get some data logs tomorrow. All mounted up great.
    Current: 2018 Audi Exclusive Nogaro Blue RS3 w/Unitronic Stage 1+ E85 ECU and Stage 2 TCU, Water/Meth Injection, Black optics, Tech, Dynamic, Drivers Assistance, RS Design Packages, Carbon Inlays, Carbon Mirror

    Past: 2014 Black S4 DSG/1999 Eclipse GSX

  6. #6
    Senior Member Two Rings lowjonathan's Avatar
    Join Date
    Jun 30 2015
    AZ Member #
    339998
    Location
    641679

    Quote Originally Posted by hckymstr19 View Post
    Great thanks alot guys. And hofahome, I just finished my setup tonight with the same heat exchanger you used. I'm going to get some data logs tomorrow. All mounted up great.
    any picture of the reservoir installed??
    tks
    Volk racing G25
    KW v3
    Hotchkis ARB
    034 adjustable upp arms
    034 tranmission inserts & mount
    Uprated front bushing.
    CTS intake kit
    CTS SC pulley
    KI 184mm crank
    Custom tuned with DSG remap

  7. #7
    Veteran Member Four Rings
    Join Date
    Jan 26 2015
    AZ Member #
    311551
    My Garage
    2017 XC90, a workbench
    Location
    CO

    Quote Originally Posted by hckymstr19 View Post
    Great thanks alot guys. And hofahome, I just finished my setup tonight with the same heat exchanger you used. I'm going to get some data logs tomorrow. All mounted up great.
    Excellent! Which reservoir did you use?
    -------
    2018 S6 - stock for now
    2014 S6 - Stage 3 - Gone
    2013 S4 - Dual Pulley e85 - Gone

  8. #8
    Veteran Member Three Rings
    Join Date
    May 11 2014
    AZ Member #
    218710
    Location
    United States

    Quote Originally Posted by Hofahome View Post
    Excellent! Which reservoir did you use?
    I had one custom made from a mishimoto coolant can. 3" diameter and about 7" long and I have a 3/4" hose barb welded to the bottom and a 90 degree 3/4 hose barb welded to the side.

    I was so able to mount two 9" spal slim behind it for track days and really hot days. Fits perfectly.
    Current: 2018 Audi Exclusive Nogaro Blue RS3 w/Unitronic Stage 1+ E85 ECU and Stage 2 TCU, Water/Meth Injection, Black optics, Tech, Dynamic, Drivers Assistance, RS Design Packages, Carbon Inlays, Carbon Mirror

    Past: 2014 Black S4 DSG/1999 Eclipse GSX

  9. #9
    Veteran Member Three Rings
    Join Date
    May 11 2014
    AZ Member #
    218710
    Location
    United States

    Here is a dropbox link to see the head on view of the heat exchanger and a pic of the reservoir. Worked out great.

    https://www.dropbox.com/sh/x1sr9unij...7-fGoJNna?dl=0
    Current: 2018 Audi Exclusive Nogaro Blue RS3 w/Unitronic Stage 1+ E85 ECU and Stage 2 TCU, Water/Meth Injection, Black optics, Tech, Dynamic, Drivers Assistance, RS Design Packages, Carbon Inlays, Carbon Mirror

    Past: 2014 Black S4 DSG/1999 Eclipse GSX

  10. #10
    Veteran Member Four Rings
    Join Date
    Jan 26 2015
    AZ Member #
    311551
    My Garage
    2017 XC90, a workbench
    Location
    CO

    Quote Originally Posted by hckymstr19 View Post
    Here is a dropbox link to see the head on view of the heat exchanger and a pic of the reservoir. Worked out great.

    https://www.dropbox.com/sh/x1sr9unij...7-fGoJNna?dl=0
    Looks great! Log that bitch and post up results
    -------
    2018 S6 - stock for now
    2014 S6 - Stage 3 - Gone
    2013 S4 - Dual Pulley e85 - Gone

  11. #11
    Senior Member Two Rings lowjonathan's Avatar
    Join Date
    Jun 30 2015
    AZ Member #
    339998
    Location
    641679

    Quote Originally Posted by hckymstr19 View Post
    Here is a dropbox link to see the head on view of the heat exchanger and a pic of the reservoir. Worked out great.

    https://www.dropbox.com/sh/x1sr9unij...7-fGoJNna?dl=0
    Look good...
    Volk racing G25
    KW v3
    Hotchkis ARB
    034 adjustable upp arms
    034 tranmission inserts & mount
    Uprated front bushing.
    CTS intake kit
    CTS SC pulley
    KI 184mm crank
    Custom tuned with DSG remap

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