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changing fuel

  • 20-05-2005 4:19pm
    #1
    Registered Users, Registered Users 2 Posts: 476 ✭✭


    hey, just wondering, do u need to slowly introduce a new fuel or could you change fuel every tank(SLIGHT exageration)! this is from bout 20%-10%


Comments

  • Moderators, Recreation & Hobbies Moderators Posts: 3,455 Mod ✭✭✭✭coolwings


    Just fill her up with the new fuel, start, retune, use.
    Of course, if you have caused engine wear to the pistons/liners already (excessive internal heat with the 20%), and if compression is permanently reduced as a result, it could be hard to start with the 10%, or 5%.


  • Registered Users, Registered Users 2 Posts: 476 ✭✭no leaf clover


    hey, retune?? wat ya mean?


  • Moderators, Recreation & Hobbies Moderators Posts: 3,455 Mod ✭✭✭✭coolwings


    hey, retune?? wat ya mean?
    Well, the carb needle setting that was "nicest" with say 25% nitro, will be different from the carb needle setting that you will prefer with 10%.

    eg with 20% you might like 3 turns open, but on 10% you might prefer 2 3/4 turns open, (screwing needle out from fully in)

    So with the new juice inside, you retune until it runs right.


  • Registered Users, Registered Users 2 Posts: 476 ✭✭no leaf clover


    coolwings wrote:
    Well, the carb needle setting that was "nicest" with say 25% nitro, will be different from the carb needle setting that you will prefer with 10%.

    eg with 20% you might like 3 turns open, but on 10% you might prefer 2 3/4 turns open, (screwing needle out from fully in)

    So with the new juice inside, you retune until it runs right.


    thanks v much!!!


  • Moderators, Recreation & Hobbies Moderators Posts: 3,455 Mod ✭✭✭✭coolwings


    I'm just a little curious .... why go down in nitro, most folks go higher as time passes and the engine loses power ....?


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  • Registered Users, Registered Users 2 Posts: 476 ✭✭no leaf clover


    coolwings wrote:
    I'm just a little curious .... why go down in nitro, most folks go higher as time passes and the engine loses power ....?


    i've a gallon of 10% but barely a tank of 25% and was just taking it easy so didn't want to waste it!


  • Moderators, Recreation & Hobbies Moderators Posts: 3,455 Mod ✭✭✭✭coolwings


    Mixing them together would be no harm .... the 10% would have a bit more "kick" as a result, and be less of a change.


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