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Thread: OLFA table vs. Custom OS A0008 table

  1. #1
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    Default OLFA table vs. Custom OS A0008 table

    My custom OS does not have OLFA, it has a A0008 file. The A0008 states its a multiplier. Is this truely a multiplier or is it a divider?

    Thanks,
    Glenn

  2. #2
    EFILive Crew Site Admin Torden's Avatar
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    It is a multiplier. I'm going to assume that your display units are AFR or EQ Ratio , and that the commanded AFR is 14.63:1 (or EQ Ratio of 1.0) for the example.

    - A multiplier of 1.00 the commanded AFR will be 14.63:1
    - A multiplier of 1.20 the commanded AFR will be 12.19:1 (Richer)
    - A multiplier of 0.80 the commanded AFR will be 18.29:1 (Leaner)

    The multiplier is for enrichment (richening the mixture) and the lower the AFR numbers are richer the mixture.

    Hope that makes sense.
    Andrew
    EFILive Crew


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    how is 0.80*14.629=18.29 a multiplication? i'd call it a division

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    Senior Member NewV's Avatar
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    Quote Originally Posted by redhardsupra
    how is 0.80*14.629=18.29 a multiplication? i'd call it a division
    No wonder my AFRs are out of whack
    2005 CTS-V w/tuner wannabe driver

  5. #5
    EFILive Crew Site Admin Torden's Avatar
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    All I can say is 'whatever', a higher number is more fuel. Multipliers generally give 'more', which in this case is fuel.

    Either way, that's how it works.
    Andrew
    EFILive Crew


  6. #6
    Lifetime Member Garry's Avatar
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    Quote Originally Posted by redhardsupra
    how is 0.80*14.629=18.29 a multiplication? i'd call it a division
    If you look at it on EQ basis, it's a multiplier
    Garry Glendown * '17 Fifty 2SS MT * 99 Firehawk Convertible (for sale)

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  8. #8
    Joe (Moderator) joecar's Avatar
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    Quote Originally Posted by Garry
    If you look at it on EQ basis, it's a multiplier
    This is the key.

    It multiplies the current EQ to get the target EQ; the current EQ equals 14.63 divided by current AFR.

    AFR = 14.63 / EQ = 14.63 * Lambda

    or

    EQ = 14.63 / AFR = 1 / Lambda

    EQ, Lambda, AFR are all units of how much air/fuel.

    A008 is a multipler in the sense that it multiplies current EQ to give target EQ.

    Like Tordne said, the higher numbers are richer.

    Edit: the more I write here, the muddier it is becoming...
    Last edited by joecar; January 4th, 2007 at 08:30 AM.

  9. #9
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    Okay, I am going to try what Tordne said and see what happens.

    The whole multiplier/division thing confuses me; however, I understand what is being stated!

    I will let you know how it goes.

    Thanks for all of the help!

    GLenn

  10. #10
    Lifetime Member Whippled 496's Avatar
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    Quote Originally Posted by redhardsupra
    how is 0.80*14.629=18.29 a multiplication? i'd call it a division
    Thats what i am trying to wrap my head around...lol. My commanded AFR is 14.70:1 and my multiplier (for a specific cell) is 1.0229. 14.70 x 1.0229 = 15.036 which equals a leaner AFR. So regardless of the table description of "multiplier", if i put a number larger than 1.00 in there, thats going to equal more fuel right?
    2014 GMC 2500HD RCLB SLE
    LML / Allison

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