E-85 conversion
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E-85 conversion

  1. #1
    SLOW MEMBER slowboy's Avatar
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    Default E-85 conversion

    I am in the process of changing my boat over to E-85 fuel. I have been running 91 octane pump gas. The engine is a 400 sbc with a 6-71 and an intercooler. I installed my new wideband O2 sensor today, and am going to do the carb and fuel line mods in the next couple of days.

    My question is this.

    Right now I am spinning an AA stainless impeller 5500 rpms and the boat is going 85-86 miles per hour at 7 lbs of boost.

    I was told that with the E-85 that I could about double my boost safely. Does anybody have any general ideas of what kind of power is to be gained by doubling the boost? 20% more? 30% more? 50% more?

    Thanks, Ryan
    Last edited by slowboy; 09-24-2009 at 04:25 PM. Reason: I kant spel
    WORK HARDER, MILLIONS ON WELFARE DEPEND ON YOU.

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  3. #2
    mo balls than $cents$ IMPATIENT 1's Avatar
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    is your wideband ok with ethanol? most aren't, it'll appear to be working correctly, but it'll be lean when it shows that its ok, just be carefull. i kept goin thru wideband o2sensors on my blown 475 i was runnin 10lbs of boost on and it turned out it was the ethanol in the local fuel

    Dare to be different, if it turns out great you can claim you planned it that way.

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  4. #3
    SLOW MEMBER slowboy's Avatar
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    My new wideband is ok with ethanol but I guess it is recommended to be used on the Lamda setting.
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    Senior Member smitt19's Avatar
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    Default change

    a lot of threads on this topic , good to 110 + gas equivalent 14 lbs is pushing it but not far off saw fast now has 2 02 set ups one for gas the other for ethanol/methanol they work great, looking to make the change myself, whos doing your carbs?

  7. #5
    No Sandbar To Far sanger rat's Avatar
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    Is your blower stripped? If not you are not going to gain much but alot of extra heat. I'm 11% over on a non stripped 8-71. If I had the pulleys I would like to be at about 5% over. E85 is great stuff I just wish I could carry 30 gallons onboard. Maybe Blown540 will see this and chime in. He's making some good numbers with his set up.
    Quote Originally Posted by One More Year View Post
    The only blab's I will even be a part of is just when it is me they are talking about. Aaaah yes I can see a few good looking shiny tall deck motors on the beach, with barely enough fuel to get back to the launch saying, "Holy crap how fast you think that Daytona was going man? That's like the 20th time he's gone by today?"

  8. #6
    Highaboosta Unchained's Avatar
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    Quote Originally Posted by IMPATIENT 1 View Post
    is your wideband ok with ethanol? most aren't, it'll appear to be working correctly, but it'll be lean when it shows that its ok, just be carefull. i kept goin thru wideband o2sensors on my blown 475 i was runnin 10lbs of boost on and it turned out it was the ethanol in the local fuel
    I never heard that one before.
    The O2 sensor that came with my FAST XFI has only run on E85.
    I've put over 200 gallons though it this season.
    The O2 readings were the same as I got on my Innovate LM-1

    My engine on E85 has been putting out 27# + boost for this whole season.
    More boost than I wanted but the turbos really like E85 fuel.
    I run 33 degrees total timing @ 7600 rpm.

    An unstripped roots blower is not capable of putting out a boost number that will be higher than that fuel will take.

    Twin Turbo 1800 HP V-Drive lake boat

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    Quote Originally Posted by Trigger View Post
    No one cares about your buddies old antiquated garden hose technology.
    Quote Originally Posted by MAXIMUS View Post
    I think I could run more boost but it's a real hand full right now

  9. #7
    SLOW MEMBER slowboy's Avatar
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    Quote Originally Posted by smitt19 View Post
    a lot of threads on this topic , good to 110 + gas equivalent 14 lbs is pushing it but not far off saw fast now has 2 02 set ups one for gas the other for ethanol/methanol they work great, looking to make the change myself, whos doing your carbs?
    My buddy in town is helping me with the carbs, he as a jet with a stock short block, twin diesel turbos, and a blow through carb. He has messed with the E-85 tune for the last couple of years, and has it figured out pretty good.

    By blower is stripped, and is going to be going in for a rebuild after the season is over (lakes frozen) in about 1.5 months.

    My current engine is making around 700-750hp at 7 lbs of boost with the intercooler. I have been told by some people that on E-85 I should be able to make 11-1200hp. Seems like alot?
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  10. #8
    SLOW MEMBER slowboy's Avatar
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    Well, we got the carbs modified today, re did my fuel system, added a temporary fuel cell where my back seat goes. Installed an a1000 aeromotive pump and regulator, installed all new number 10 lines to supply the carb manifold. All that is left is to wire up the a1000 and fire her up. Hopefully the tune we put into the carbs is close, but probably not.

    Should know tomorrow how it runs, as long as the rain holds out.
    WORK HARDER, MILLIONS ON WELFARE DEPEND ON YOU.

  11. #9
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    Keep us posted. I thought about this for my T-Turbo Schiada. Post some pics of you and your bud's diesel turbo set-up.

  12. #10
    Senior Member TwinTurbo540's Avatar
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    Keep us posted! Sounds like a great project!

    Travis

  13. #11
    Senior Member Jim W's Avatar
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    E85forum.com

    This might help you also.

    Just got back from beating the snot out of my 63 Nova 496 on E-85.
    I like to let it idle in the garage when I get done so I can smell the exhaust LOL

    Jim
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    Do you guys ever read anything I post, or just go straight for the throat?


    Got it wet on 6/15/10-------->finally......



    E-85 I'm saving the world--->8 thumps at a time

  14. #12
    No Sandbar To Far sanger rat's Avatar
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    Quote Originally Posted by Jim W View Post
    E85forum.com

    This might help you also.

    Just got back from beating the snot out of my 63 Nova 496 on E-85.
    I like to let it idle in the garage when I get done so I can smell the exhaust LOL

    Jim
    I bet you like sniffing the fuel jugs too. Dam that stuff smells good!
    Quote Originally Posted by One More Year View Post
    The only blab's I will even be a part of is just when it is me they are talking about. Aaaah yes I can see a few good looking shiny tall deck motors on the beach, with barely enough fuel to get back to the launch saying, "Holy crap how fast you think that Daytona was going man? That's like the 20th time he's gone by today?"

  15. #13
    Senior Member Jim W's Avatar
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    Quote Originally Posted by sanger rat View Post
    I bet you like sniffing the fuel jugs too. Dam that stuff smells good!
    I have 2--55 gal barrels that came from Canandaigua Wine Co. for my supply. Ever had any Richard's Wild Irish Rose???? Richard is a friend of mine LOL
    The E-85 raw smells like grapes.
    The exhaust smells like-------------------->horsepower!!!!

    Jim
    GN7
    Do you guys ever read anything I post, or just go straight for the throat?


    Got it wet on 6/15/10-------->finally......



    E-85 I'm saving the world--->8 thumps at a time

  16. #14
    No Sandbar To Far sanger rat's Avatar
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    Smells like El Toro Tequila to me. Might have a different smell in other parts of the country.
    Quote Originally Posted by One More Year View Post
    The only blab's I will even be a part of is just when it is me they are talking about. Aaaah yes I can see a few good looking shiny tall deck motors on the beach, with barely enough fuel to get back to the launch saying, "Holy crap how fast you think that Daytona was going man? That's like the 20th time he's gone by today?"

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