TuneECU CO value
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Thread: TuneECU CO value

  1. #1
    Member
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    TuneECU CO value

    Hi,
    in this thread: https://www.benelliforum.com/forum/p...-advice-2.html
    post #14
    says "setting for co correction is 0,945 in Tune ecu and should cause around 4%co at 3000rpm"

    in this another thread:
    https://www.benelliforum.com/forum/tnt/13820-co2-fuel-trim.html
    post #2
    says "Increasing it will actually richen"

    so... in order to get a richier mix, its increasing or decreasing the CO value in TuneECU?

  2. #2
    Senior Member Engenia's Avatar
    Name
    Errol Kowald
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    Canberra, ACT, Australia
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    It depends on which side of stoich you are, but in this case it is highly unlikely the AFR is above 14.7:1 at idle as it would run like crap.
    So, a richer mix decreases the AFR and increases unburnt fuel and hence CO.
    Here's a table that relates CO % to AFR.
    Nell prefers to idle between 13 & 12.4 : 1. Higher than that and she stalls more and doesn't idle as sweetly.
    A friends RS was quite happy to idle at 13.5:1, but tends to stall more. I need to richen it up and raise the idle speed by 100 rpm in an attempt to reduce the tendency to stall.
    Every engine seems to have its own sweet spot.
    hooroo, Errol www.engenia.com.au [139,200 km - and counting .....]

  3. #3
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    I can see the relationship between %CO and AFR...

    But what about CO in TuneECU and %CO ?

    Now CO Value in TuneECU in my bike shows 1.0000 and 1.0000

    Going, let say, from 1.000 to 1.100, will increase AFR or decrase?

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