What is the Best E-85, Flex Fuel Conversion Kit ?

Discussion in 'Gen 2 Prius Accessories & Modifications' started by RhinoPrius, May 4, 2011.

  1. RhinoPrius

    RhinoPrius Junior Member

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    I have three Generation 2 Prius's and I want to know if anyone has converted their Prius to E-85 ? I would like to know if the claims of increased performance and mileage are true. There are many conversion kits claiming to be the best. They claim better performance and cleaner emissions on a Prius Generation 2. What is the best flex fuel conversion kit for a Prius? What has your experience been with E-85 ? Are the conversion kits legal in the State of California ? Please reply with your experiences. THANK YOU !
     
  2. cwerdna

    cwerdna Senior Member

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    Thank you for the normal looking post. IIRC, you'd posted multiple times before w/a crazy # of emoticons, for some reason. If so, those posts were deleted... it seems.

    I don't know anyone who's done it. I hope you realize there aren't many E85 stations in the Bay Area. See Growth Energy Market Development.

    It also seems foolish given the E85 MPG/BTU adjusted price at http://www.fuelgaugereport.com/. CR tested a flex fuel capable Tahoe. Per Test results: E85 vs. gasoline, their mileage went from 14 mpg on gasoline to 10 mpg on E85. More info on the links on the left side of the article.

    http://www.mpt.org/motorweek/goss/2706.shtml and
    shows what's different between a flex fuel vs. non FF car.
     
  3. JimboPalmer

    JimboPalmer Friend to those who want no friends

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    8.3333 * $3.65 E10= $30.42 400/$30.42 = 13.15 MP$
    8.3333 * $3.15 E85= $26.25 280/$26.25 = 10.67 MP$

    Even if it was safe and efficient to run a Prius on E85, the Miles per Dollar would not work out.
     
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  4. a_gray_prius

    a_gray_prius Rare Non-Old-Blowhard Priuschat Member

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    There's really no increased performance with a Prius since it's a naturally aspirated engine. The major gains are seen in forced-induction situations where E85 allows for significantly increased boost pressure.
     
  5. mynameisjim

    mynameisjim Junior Member

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    That video sounds overly sensational. "Buried way deep in the engine, clear down in here, VALVES!" He's not describing or pointing to a place where valves are normally installed.

    I don't doubt his point, metals in our vehicles will react differently to E85, but I disagree with his method.
     
  6. cyclopathic

    cyclopathic Senior Member

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    yeah, go to Fueleconomy.gov and pick any Chrysler/GM flex fuel product. Reduced MPG kills all per gallon savings, YMMV
     
  7. Zardoz

    Zardoz Junior Member

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    This is an old thread but perhaps someone knows something new...
    I desire to add a Flex-Fuel Conversion kit to a Prius. For me, there is only one reason and that is the Alternative Fuel license plate that gives me 24/7 access to carpool lanes in Arizona.

    Does anyone have a good recommendation for a quality unit?

    Thanks!
     
  8. bisco

    bisco cookie crumbler

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    don't ever recall reading about it being done. i think someone, maybe in europe? was using e85 without a conversion, as a test.

    edit: see the thread, 'E85 fuel'.
     
  9. Rmay635703

    Rmay635703 Active Member

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    Brazil has some rather simple devices to make this happen.

    Something as simple as a 17% size /volume increase on your injectors accomplishes the same thing.

    Also most cars loose maybe 20% FE (Volt is 17%)

    Prius is capable of higher compression and could have gains if the ECM allows the valves to stay open long enough

    I guess someone has to be first and report back
     
  10. Kevin_Denver

    Kevin_Denver Active Member

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    See this thread: Long Term Effects of E85 on "Rubber" Bladder | Page 3 | PriusChat

    Basically you just need injectors that will put in 10-20% more fuel. The computer will adjust the fuel trim without throwing a code to + or - 20%. So injectors that inject 10-15% more are ideal as you should still be able run regular unleaded without problem on them.

    I've ran a couple of tanks of E15 in my Prius to experiment and because it's 5% cheaper than regular E10, and there are no noticeable effects of doing so (fuel economy seems ~1mpg worse which makes sense, but my data's not accurate enough to really tell).
     
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