E85. Who using it? Likes? Dislikes?
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E85. Who using it? Likes? Dislikes?

  1. #1
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    Default E85. Who using it? Likes? Dislikes?

    Pretty much what the title says. Looking for some real world experiences, Thanks in advance.

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    A little more information would be helpful.
    Is it blown, how will you use the boat (performance or cruising), is this a new motor, rebuild or using the motor you have now?

    I use it in a blown flat and like it. I also have a slightly larger performance V-drive and would not use it for that boat.
    I'd do the e85 again in the flat though.

    Calculate the fuel you expect to use now and reduce the running time and or distance by 1/3. Does that work for how you use the boat?
    You could put in larger tanks as an option, but that cancels any performance gains you would get from the e85.

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    Urban Cougar Trapper Gopher711's Avatar
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    I just switched from AvGas to E85 ...8/71 with Dominators , motor is just now being dialed in but so far this stuff looks to be the ticket 👍🏼
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    Not a huge deal on the west coast but you need to get a test kit and check the e85

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    Can you prove it cabron? TSR2626's Avatar
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    I've run E85 in my flat on an N/A 540 EFI engine and have been happy with it. It doesn't take long before my twin 9gal tanks are empty though. It was pretty easy to get a decent tune with the stuff too. seems to be a little harder to find when I go out to our place in AZ. I assume there are places to get it in havasu?

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    Urban Cougar Trapper Gopher711's Avatar
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    Another main selling point for me was 105+ Octane fuel for about $1.60 a gallon compared to over $5 a gallon for AvGas and $7 on up for race fuel ? ....is a no Brainer swap
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    Due to the fact that GOD limited mans intelligence , it's unfortunate he did not also limit his Stupidity !!!

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    Quote Originally Posted by TSR2626 View Post
    I've run E85 in my flat on an N/A 540 EFI engine and have been happy with it. It doesn't take long before my twin 9gal tanks are empty though. It was pretty easy to get a decent tune with the stuff too. seems to be a little harder to find when I go out to our place in AZ. I assume there are places to get it in havasu?
    No E85 in Havasu

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    Quote Originally Posted by Gopher711 View Post
    Another main selling point for me was 105+ Octane fuel for about $1.60 a gallon compared to over $5 a gallon for AvGas and $7 on up for race fuel ? ....is a no Brainer swap
    Where are you paying 5 a gal for avgas? Havent seen it that high in a couple yrs its under 3 a gal here. I was gna put methanol to the next tt ls im building but now that avgas took a huge dive im gna run it again.

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

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    Quote Originally Posted by jimsplace View Post
    A little more information would be helpful.
    Is it blown, how will you use the boat (performance or cruising), is this a new motor, rebuild or using the motor you have now?

    I use it in a blown flat and like it. I also have a slightly larger performance V-drive and would not use it for that boat.
    I'd do the e85 again in the flat though.

    Calculate the fuel you expect to use now and reduce the running time and or distance by 1/3. Does that work for how you use the boat?
    You could put in larger tanks as an option, but that cancels any performance gains you would get from the e85.
    Performance and cruising. New build. Prices are the big draw to using it.

    Quote Originally Posted by TSR2626 View Post
    I've run E85 in my flat on an N/A 540 EFI engine and have been happy with it. It doesn't take long before my twin 9gal tanks are empty though. It was pretty easy to get a decent tune with the stuff too. seems to be a little harder to find when I go out to our place in AZ. I assume there are places to get it in havasu?
    Where are you at with your compression? Cam soecs?

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    Highaboosta Unchained's Avatar
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    Quote Originally Posted by TSR2626 View Post
    It doesn't take long before my twin 9 gal tanks are empty though.
    I've gone 36 miles and used 16 gallons just cruising at 35 mph +-
    I didn't think that was too bad.

    On the dyno at 29# boost it looked like it used close to a gallon in 10 seconds.

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    I think I could run more boost but it's a real hand full right now

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    Quote Originally Posted by Psycotic Break View Post
    Performance and cruising. New build. Prices are the big draw to using it.



    Where are you at with your compression? Cam soecs?
    My experience with e85 is, you probably don't save money using e85. While it does cost less initially, it also requires more fuel used for the same cruising distance.
    You will not be able to find e85 at most marinas, if any. The ethanol absorbs water from the air and creates problems for long term use near water.
    E85 does provide a fairly high octane for the money though, and makes a great inexpensive performance fuel.

    If you are building an engine specifically with e85 in mind, it may be possible to get the fuel economy up to nearly match that of gasoline.
    Most automobiles from the factory capable of using e85 are designed to run on pump gas (e10) and up to e85. To do that, there must be compromises made by the factory.
    If the engine is somewhat made specifically for e85, those compromises don't have to be there, and it can be made more efficient.

    I'd guess that most of us who use e85 are more interested in the performance portion, and accept that were not going very far when we start with 10 gallons of e85 and like to play.

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    Quote Originally Posted by Unchained View Post
    I've gone 36 miles and used 16 gallons just cruising at 35 mph +-
    I didn't think that was too bad.

    On the dyno at 29# boost it looked like it used close to a gallon in 10 seconds.
    Thanks UNCHAINED, you confirmed what I assumed was about correct.
    I had thought near the 2 mpg wouldn't miss it far for cruising, and with a 10 gallon tank about 4-5 runs is all that I am comfortable with, and it's time to look for more fuel.
    My guess is your turbo's are more efficient than my 14-71 and you also make more power, by quite a bit.

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    Well I haul my own fuel so that's not really an issue. I fill a tank now so I guess I'd just be filling two. Lol
    I think at 13 to 1 e85 is quite a bit cheaper than gas. I guess the real question is all things being equal well as they can be. What kind of power difference do you get at 13 to 1 with e85 over 10 to1 and super?
    Last edited by Psycotic Break; 03-01-2016 at 04:28 PM.

  16. #14
    Can you prove it cabron? TSR2626's Avatar
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    Quote Originally Posted by Psycotic Break View Post
    Where are you at with your compression? Cam soecs?
    13.5cr 268/268 750/770

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