2015 Ecoboost Mustang Aquamist HFS-4 Installation Guide

Discussion in 'I4 2.3L EcoBoost Engine / Mods: Bolt-ons, Exhaust,' started by RubyRed15, Jan 21, 2020.

  1. RubyRed15

    RubyRed15 Ok, so it's blue.

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    I was initially planning to write this all out in the forum, but it turned into a 25pp document, so I've attached it as a PDF. I've included the other reference PDFs I used to complete my installation, too, including the v3 diagram from Aquamist, which I did not use, but you will need if your car has the 16 pin width ECU plugs.

    I chose the Aquamist system for my Ecoboost Mustang, despite its considerably-higher expense over the competition, because it seems to be the most comprehensively well-engineered system with the best built-in failsafe. The major competitors’ inadequate or non-existent failsafes rendered them non-options for me. There are several gaps in the Aquamist installation instructions, so I am attempting to capture as much of my learning as possible for anyone coming behind me with a Mustang installation.

    This is a fairly advanced installation. You’ll need to know how to read wiring diagrams and schematics in addition to general mechanical competencies like making holes, measuring, wiring, and so on. You assume and are responsible for any and all risks and any and all damage that occurs from your installation.

    Install Time: plan for four full days.

    Table of Contents
    • Tools, Materials, and Parts Needed (other than standard tools, wrenches etc.)
    • Plan Your Installation.
    • Tank Installation.
    • Methanol Vent Installation.
    • Pump Installation.
    • 6mm Line Plumbing.
    • Pump Harness Routing.
    • FAV Installation.
    • ECU Harness Installation.
    • Left-side Harnesses.
    • Controller Installation.
    • Silicone Hose Adapter/Nozzle Installation.
    • Notes on Initial Testing.
    • Setting the Failsafe.
     

    Attached Files:

    kent0464 likes this.
  2. Scootsmcgreggor

    Scootsmcgreggor Well-Known Member

    First Name:
    Scott
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    Very little info on this unit installed on our ecoboost’s so this is great to see. It is by far the most sophisticated system. Ive been dreaming about a 5 nozzle aqua mist setup.
     
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  3. OP
    OP
    RubyRed15

    RubyRed15 Ok, so it's blue.

    Vehicle(s):
    Ecoboost Premium PP
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    Results: 2015 Ecoboost Mustang PP
    392 hp, 456 tq
    +27% hp, +30% tq over stock

    The dip at 6,300rpm is the Aquamist failsafe triggering. I was unaware, at the time, that you're supposed to disable the failsafe on the dyno. I did get confirmation, though, that when the failsafe cuts boost, timing drops with it, so the engine is very well-protected. Ignore the blue lines. Dyno_After_With.png boost - Copy.png timing - Copy.png
     
  4. kent0464

    kent0464 Well-Known Member

    First Name:
    Kent
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    1983 Ford Ranger, 1986 SVO Mustang, 2017 Mustang GT PP, 2017 F150 3.5 Eco
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    Awesome! I started using Aquamist in 2003. It’s really the safest, best built and most comprehensive kit of its kind.
     
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