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  1. #1
    Senior Member Two Rings
    Join Date
    Jul 23 2015
    AZ Member #
    344559
    Location
    Montreal canada

    running E85 with a piggyback

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    hi I just want to know if i will have any gain running E85 on a s4 with only piggyback and intake.
    Its just for a couple 1/4mile runs

  2. #2
    Veteran Member Four Rings whiped's Avatar
    Join Date
    Apr 05 2016
    AZ Member #
    371376
    Location
    Portland, OR

    I wouldn't run full E85 without a dedicated tune.

    I've mixed in 4 gals into my tank and turned my CW up a notch. Worked out pretty well.
    Geoff
    '13 S4 - Glacier White | DSG | 034 Stage 2++ | Current Setup
    452WHP / 443WTQ | 11.352 @ 119.26 | @dirtyaudi

  3. #3
    Established Member Two Rings
    Join Date
    Jan 11 2010
    AZ Member #
    53257
    My Garage
    2008 Barbie Jeep - Hot Pink
    Location
    Austin, TX!

    I run 1:4 ratio of E85 to 93 and logging shows better output, but no runs to prove it.

    Sent from my SM-G920P using Tapatalk
    2010 S4 S tronic Meteor Grey - Koni Sports, H&R OE Sport Springs, S-FLOW Intake (gone)
    2015 S4 S tronic Monsoon Grey - Alcon Mono6 375mm BBK, Eurocode USS Sway Bars, EPL Stage 1 (replaced with BMW 330e and Piper Cherokee 235)

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

    Full e85 on piggy is a horrendous idea.
    -------
    2018 S6 - stock for now
    2014 S6 - Stage 3 - Gone
    2013 S4 - Dual Pulley e85 - Gone

  5. #5
    Veteran Member Four Rings stereojorge's Avatar
    Join Date
    Oct 15 2013
    AZ Member #
    124988
    My Garage
    2014 Audi S4 P+ DSG, 2015 Audi SQ5 Prestige
    Location
    Tampa, Florida

    Quote Originally Posted by whiped View Post
    I wouldn't run full E85 without a dedicated tune.

    I've mixed in 4 gals into my tank and turned my CW up a notch. Worked out pretty well.
    Exactly what he said! Ran awesome!


    Sent from my iPhone using Tapatalk
    '14 Misano Red S4/APR Stage II+ DP ECU+TCU & UC/187mm Crank & AWE 57.55mm SC Pulleys/CMD Charge Chamber Intake/KW V1 Coilovers/EuroCode Sway Bars & AluKreuz/CR-15/034 Trans Mount/Apikol Rear Diff Mount/ECS Rear Diff Carrier Mounts/CMD Test Pipes/AWE Reso.Downpipes/AWE Track Exhaust 102mm Tips/Vossen HF-3 19" x 9.5"/Michelin PS4S'/StopTech Drilled Rotors/Akebono Euro Ceramic Pads/StopTech SS Lines

    Also: 2015 SQ5 Prestige | 2003 A4 Avant Quattro 6MT

    Previous: 2010 S4 P+ | 2008 A4 S-Line

  6. #6
    Veteran Member Four Rings MVR 155's Avatar
    Join Date
    Apr 04 2013
    AZ Member #
    112675
    My Garage
    2018 Audi S6, 2015 GMC Yukon Denali and 2002 Corvette Z06
    Location
    Bartlett, IL

    To echo the others, I definitely would not run straight E85 with a piggyback. Even with a dedicated full E85 tune I believe you need to do some fuel system upgrades to support the additional volume of fuel that's called for. I run a piggyback currently (CW) and have had good results running 3-4 gallons of E85 with the rest 93 octane.
    2018 S6 Prestige, Glacier White/Black, S-Sport, Driver Assistance, Black optic, Carbon inlays, Cold weather, Vorsteiner VFF 103's in carbon graphite.

    2002 Corvette Z06
    2015 GMC Yukon Denali

  7. #7
    Veteran Member Three Rings
    Join Date
    Apr 30 2014
    AZ Member #
    203552
    My Garage
    B8.5 S4, A3 e-tron
    Location
    CA, Bay Area

    I do 3 gals e85 rest 91 on CW pro

  8. #8
    Senior Member Two Rings
    Join Date
    Jul 23 2015
    AZ Member #
    344559
    Location
    Montreal canada

    oups sorry for that grey zone that i left i wanna mix not E85 straight ahah

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