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  1. #1
    Established Member Two Rings
    Join Date
    Dec 01 2017
    AZ Member #
    410581
    Location
    Dallas

    S4 EA839 Motor Info

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    https://www.yumpu.com/en/document/vi...5/ssp655-wg-en

    I found this posted on another site and thought I would share it here.

    This is some information overload that you can really nerd out to.

    Some Highlights:

    Forged Crank
    Cast Pistons (Boo)
    Piston Cooling Jets
    Hardened Rods
    Closed Deck Block
    Oil Cooler
    Built in Catch Can (Seriously PG 21)


    Really interesting read. Seems like the main limiting factor for big HP builds when the ECU is cracked are the cast pistons. Everything else internal looks pretty stout. Lots of attention to cooling both coolant and oil wise.

    Enjoy!

  2. #2
    Senior Member Two Rings S4_Pedro's Avatar
    Join Date
    Sep 17 2012
    AZ Member #
    100624
    Location
    Union

    Some good enough here! Not bad at all other than the pistons haha


    Sent from my iPhone using Audizine

  3. #3
    Active Member One Ring
    Join Date
    Jan 25 2018
    AZ Member #
    413025
    Location
    MI

    Super cool, thanks for sharing.

  4. #4
    Established Member Two Rings electron bom's Avatar
    Join Date
    Aug 28 2017
    AZ Member #
    405898
    My Garage
    B9 S4 EVO IX
    Location
    North Carolina

    Very cool, thanks for sharing. I'm a bit confused. The document indicates the EA839 supersedes the EA837. I thought the engine code for my 2018 S4 was EA838?

  5. #5
    Registered Member One Ring
    Join Date
    Jun 11 2018
    AZ Member #
    420463
    Location
    Calgary

    Here is a PDF copy. Thanks to benz240 on the other forum for making it.

    https://drive.google.com/file/d/1Gru...ew?usp=sharing

  6. #6
    Senior Member Two Rings vdubtx's Avatar
    Join Date
    Nov 24 2014
    AZ Member #
    297248
    Location
    Rockwall, TX

    Awesome info. Thanks for posting it up.
    2018 S4 Prestige, Daytona Gray Pearl, Black Optic, S Sport, Napa Leather

    2012 A4 Premium Plus, Monsoon Gray, Quattro, Navi, Push Start. VCDS mods needle sweep, windows up/down with fob, no wink turns, fogs as cornering lights.

  7. #7
    Veteran Member Four Rings BoostEasy's Avatar
    Join Date
    Aug 07 2013
    AZ Member #
    120502
    My Garage
    2014 S5, S-tronic
    Location
    NE

    Quote Originally Posted by -LoneStar- View Post
    https://www.yumpu.com/en/document/vi...5/ssp655-wg-en

    I found this posted on another site and thought I would share it here.

    This is some information overload that you can really nerd out to.

    Some Highlights:

    Forged Crank
    Cast Pistons (Boo)
    Piston Cooling Jets
    Hardened Rods
    Closed Deck Block
    Oil Cooler
    Built in Catch Can (Seriously PG 21)


    Really interesting read. Seems like the main limiting factor for big HP builds when the ECU is cracked are the cast pistons. Everything else internal looks pretty stout. Lots of attention to cooling both coolant and oil wise.

    Enjoy!
    Cast pistons are fine. They may have slightly less bend or break strength vs alum alloys used on forged pistons but on a forced induction engine, heat is what kills pistons 99% of the time.

    Aftermarket forged are often worse vs cast because they expand more and crack the crown when it expands enough.


    Sent from my SM-G950U using Audizine mobile app
    2014 S5 S-tronic. Phantom Black, 19" AG M590s, Akebono Pads, OEM RS5 Grill, Alu-Kreuz, Black Alcantara, MMI, Quattro Sport Diff, B&O sound, side assist.
    2011 335xi (gone)
    2008 335xi (gone)

  8. #8
    Active Member Two Rings
    Join Date
    Apr 23 2017
    AZ Member #
    398293
    Location
    PA

    Do they have this for the RS5 yet?



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