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  1. #1
    Senior Member Three Rings FuzzyHat's Avatar
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    Parts Needed to run E85

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    Total noob question. Iím fairly new to the whole modification of cars, and wanted to ask what would be needed to be able to run a full E85 tune on this platform?

    Thank you in advance!


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  2. #2
    Veteran Member Four Rings 2380S4's Avatar
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    I believe with this platform you would need to replace the fuel pump and injectors with higher pressure ones. The stock fuel system has been able to handle up to E70 levels, but not above that.
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  3. #3
    Veteran Member Four Rings jl87's Avatar
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    Probably something similar to the S3 when adding port injectors, which is a LPFP and bigger port injectors.
    APR kit for reference purposes https://www.goapr.com/products/fueling_ea888_gen3.html

  4. #4
    Stage 2 Banner Advertiser Four Rings Arin@APR's Avatar
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    Aug 23 2008
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    Auburn, AL

    The forthcoming APR Tune will only require the tune.
    GoAPR.com | Facebook | YouTube | Twitter | Instagram
    Phone: (800) 680-7921 Local Phone: +1 (334) 502-5181 Fax: +1 (334) 502-5180
    Address: APR LLC, 4800 US HWY 280 West, Opelika, AL 36801

  5. #5
    Active Member Two Rings
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    Rancho Murieta, CA

    Quote Originally Posted by Arin@APR View Post
    The forthcoming APR Tune will only require the tune.
    Yes!!!

    To clarify further, Arin, itís only when you step up to stage 2 and try to run E85 that you start running into the limits of the stock fuel system. Am I correct on that?
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  6. #6
    Stage 2 Banner Advertiser Four Rings Arin@APR's Avatar
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    Aug 23 2008
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    Auburn, AL

    You will be good up to 85% ethanol on stage 1 and 2. When we drop in a larger turbo, we upgrade the injectors and low pressure fuel pump.
    GoAPR.com | Facebook | YouTube | Twitter | Instagram
    Phone: (800) 680-7921 Local Phone: +1 (334) 502-5181 Fax: +1 (334) 502-5180
    Address: APR LLC, 4800 US HWY 280 West, Opelika, AL 36801

  7. #7
    Established Member Four Rings
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    Nov 06 2017
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    Vancouver

    Quote Originally Posted by Arin@APR View Post
    You will be good up to 85% ethanol on stage 1 and 2. When we drop in a larger turbo, we upgrade the injectors and low pressure fuel pump.
    All ten injectors?

  8. #8
    Established Member Two Rings
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    Quote Originally Posted by Arin@APR View Post
    You will be good up to 85% ethanol on stage 1 and 2. When we drop in a larger turbo, we upgrade the injectors and low pressure fuel pump.
    Is a true flex fuel setup something that's on your road map?

    Will the option you speak of above be suitable for e50-e85? We only get e54 here.

  9. #9
    Stage 2 Banner Advertiser Four Rings Arin@APR's Avatar
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    Quote Originally Posted by Potatohead_RS3 View Post
    All ten injectors?
    We only need to upgrade the 5 inexpensive and easy-to-access injectors. :)

    - - - Updated - - -

    Quote Originally Posted by Spec c View Post
    Is a true flex fuel setup something that's on your road map?

    Will the option you speak of above be suitable for e50-e85? We only get e54 here.
    It's not flex, but it's designed for Summer / Winter blends of E85, so E60 to E85.
    GoAPR.com | Facebook | YouTube | Twitter | Instagram
    Phone: (800) 680-7921 Local Phone: +1 (334) 502-5181 Fax: +1 (334) 502-5180
    Address: APR LLC, 4800 US HWY 280 West, Opelika, AL 36801

  10. #10
    Established Member Four Rings
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    Quote Originally Posted by Arin@APR View Post
    We only need to upgrade the 5 inexpensive and easy-to-access injectors. :)
    LOL that's what I was hoping to hear

  11. #11
    Established Member Two Rings
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    Quote Originally Posted by Arin@APR View Post
    We only need to upgrade the 5 inexpensive and easy-to-access injectors. :)

    - - - Updated - - -



    It's not flex, but it's designed for Summer / Winter blends of E85, so E60 to E85.
    Thanks. I s flex fuel something you'll be working towards in the future?

    I've heard the oem ecu has provisions for it.

  12. #12
    Stage 2 Banner Advertiser Four Rings Arin@APR's Avatar
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    Given our pervious delays, I don't want to promise anything at this point.
    GoAPR.com | Facebook | YouTube | Twitter | Instagram
    Phone: (800) 680-7921 Local Phone: +1 (334) 502-5181 Fax: +1 (334) 502-5180
    Address: APR LLC, 4800 US HWY 280 West, Opelika, AL 36801

  13. #13
    Veteran Member Four Rings sciblades's Avatar
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    North Salem/Palm Beach

    Quote Originally Posted by Spec c View Post
    Thanks. I s flex fuel something you'll be working towards in the future?

    I've heard the oem ecu has provisions for it.
    Where did you hear the ECU has ethanol mapping?

    I think your source is mistaken

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  14. #14
    Active Member Two Rings nicholasdaa's Avatar
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    Quote Originally Posted by sciblades View Post
    Where did you hear the ECU has ethanol mapping?

    I think your source is mistaken

    Sent from my SM-N950U using Tapatalk
    Someone posted their stock dyno results with 91 and with 91+E85 for an E20-30 mixture and picked up ~20 WHP/WTQ. I fill up with a little E85 occasionally and feel a large difference as well, brings it closer to 93 octane which many don't have access to.

    I would assume the car can pull and add timing based on fuel quality/octane/knock resistance.

    I think he might have made an assumption from that post.
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  15. #15
    Active Member One Ring mioh0609's Avatar
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    Feb 02 2018
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    i've heard the same thing as well. And even from different cars as well(15+ wrx's). essentially putting 2-3 gallons of e85 turns 91 into 93 fuel. Most 91 fuel has 10% ethanol in it anyways

  16. #16
    Veteran Member Four Rings saxon's Avatar
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    Quote Originally Posted by nicholasdaa View Post
    Someone posted their stock dyno results with 91 and with 91+E85 for an E20-30 mixture and picked up ~20 WHP/WTQ. I fill up with a little E85 occasionally and feel a large difference as well, brings it closer to 93 octane which many don't have access to.

    I would assume the car can pull and add timing based on fuel quality/octane/knock resistance.

    I think he might have made an assumption from that post.
    Quote Originally Posted by mioh0609 View Post
    i've heard the same thing as well. And even from different cars as well(15+ wrx's). essentially putting 2-3 gallons of e85 turns 91 into 93 fuel. Most 91 fuel has 10% ethanol in it anyways
    That certainly isn't ethanol mapping or anywhere close

    That's the ecu having enough adaptation to add more fuel(ethanol requires this) and then not detonate or take away timing based upon knock values

    Ethanol mapping uses an ethanol sensor to make changes based on a range which then correlates that reading to the correct mapping based upon timing, fueling and tq management etc
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  17. #17
    Established Member Two Rings
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    Quote Originally Posted by sciblades View Post
    Where did you hear the ECU has ethanol mapping?

    I think your source is mistaken

    Sent from my SM-N950U using Tapatalk
    Did I say it had built in "ethanol mapping"? I said "provisions" which is a pretty loose term, and the exact term used by said tuner, which is why I chose my words wisely.

    The general context of the conversation was that it wasn't going to be a huge deal to get working and is something on their agenda. Now I don't really know what those provisions are, but given this person's reputation I'd trust they know what they're talking about.

    I didn't feel the need to pry further. At this point its just a waiting game. Just about every modern day tuner car has aftermarket flex fuel support. It's only a matter of time.

  18. #18
    Veteran Member Four Rings 2380S4's Avatar
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    Quote Originally Posted by Arin@APR View Post
    The forthcoming APR Tune will only require the tune.
    I stand corrected as of now. Interesting to see a tune be able to adjust the pressure levels in the fuel system.

    But of course I know very little about these things.
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  19. #19
    Established Member Two Rings seanix9's Avatar
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    Quote Originally Posted by Arin@APR View Post
    You will be good up to 85% ethanol on stage 1 and 2. When we drop in a larger turbo, we upgrade the injectors and low pressure fuel pump.
    Music to my ears. Thanks APR


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