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  1. #1
    wrennie's Avatar
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    premix = less fuel...?

    i was thinking about this and i would like your views

    so this what i was thinking

    we have our ski, fuel injected and on oil injection

    we run our ski at wot for a given time, in this time injector no1 flows
    32ml of fuel and the oil injection in the same time flows 1ml of oil to no1 inlet

    so we now convert our ski to premix 32:1

    we now run our ski at wot for the same time as before, injector no1 flows 32ml of liquid

    so this is my point, we are now using aproximatly 1 part less fuel than before as the injector flow will still be the same but now only 31ml of fuel will flow as the other 1 part is oil.....however the ski will consume the same quantity of air on both runs....

    so am i correct in thinking we could not get the same fuel flow with premix so end up running a slightly leaner mix

    or am i talking a load of bull......?


  2. #2
    All hail the Chief! fullboogie's Avatar
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    Increasing the ratio of oil does lean out the mixture slightly. The EFI guys will have to take it from here -

  3. #3
    Happily Self-Employed WFO's Avatar
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    Yes, the oil in the fuel will lean the mixture a bit. I would take it to 40:1. you should be fine on a stock motor w/o a controller.

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