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  1. #1

    Lightbulb rxp fuel conversion?

    Hi.
    Have been thinking about one thing.

    Do you guys think itīs possible to run an rxp on e85/ethanol if you install a fuelpressure-regulator or larger injectors?

    This is very common with tuning cars here in sweden. The benefits is that you will gain more power. and the price of regular 95 octane pump-fuel here in sweden is around 8,5$ /gallon while the price of e85 is around 5$ /gallon.

    Do you think itīs possible or are there any risks??

    Itīs more and more common that people do this type of conversion with their regular cars due to the cost.


  2. #2
    dhoad's Avatar
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    I'm sure it can be done but I think thereare some concerns
    ethanol attracts water so that doesn't sound like a good plan for use in a marine environment.
    beyond water contamination of fuel risks, are the fuel pump, hoses etc get destroyed by the ethanol.
    Finally, when riding hard I would be refueling every hour with the 30 percent decrease in fuel mileage you see with E85
    just my 2 cents

  3. #3
    Quote Originally Posted by dhoad View Post
    I'm sure it can be done but I think thereare some concerns
    ethanol attracts water so that doesn't sound like a good plan for use in a marine environment.
    beyond water contamination of fuel risks, are the fuel pump, hoses etc get destroyed by the ethanol.
    Finally, when riding hard I would be refueling every hour with the 30 percent decrease in fuel mileage you see with E85
    just my 2 cents
    Why would the fuelpump and hoses get destroyed by the e85?
    And what do you mean, Why would it attract water? Itīs a closed system(fuelsystem).

    Ivīe done some calculation on the fuelconsumption:
    If you fill the tank up with 16 gallons of regular gas(91octane).
    To cover the same distance with the 30% more consumption of the e85 you would need 20,8 gallons of e85.

    Here in Sweden to cover the same distance the price with 16 gallons of 95octane pump gas would be: 130$

    And with 20,8(+30%) gallons of e85 the price would be: 104$

    Plus i think it would add an extra 20-30hp.

    Just some thougts.

    Please contribute with your own thoughts.

  4. #4
    captain obvious Lurker's Avatar
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    The high alcohol content in E85 will eat rubber and Aluminum. E85 compatible engines don't have or have very little rubber and Aluminum in the areas that come in contact with the fuel. Also the engine needs to be able to increase the pulse width of the injectors so that it can add more fuel, from what I've read I don't think the stock computer can do this. I'm not sure what kind of rubber is used in our engines, but I'd be willing to bet it isn't the more expensive alcohol compatible type.

  5. #5

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    another sweden "E85 fan"

    why do you have to increase the pulse width, when you can get bigger injectors and higher fuelpressure?
    and theres a lot of aluminium e85 has to past before ignition......

  6. #6
    Big K's son KeithKman's Avatar
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    E-85 runs at a way different AFR then gas. The ECU would have to be changed.

  7. #7

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    and its because of the bigger injectors you dont need to change ECU.
    think of E85 next time you get drunk.....(aggressive against aluminium)

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