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Thread: B3617 and B3641

  1. #1
    Member
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    Jan 2008
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    Default B3617 and B3641

    Hello,

    The help text for B3617 and B3641 both say they "SUBTRACT the value" from the commanded EQ ratio when I think they should say "ADD the value".

    If they really did subtract from EQ, then a positive value in those tables would make the commanded fuel go LEANER. Since adding to an EQ goes richer and subtracting from EQ goes leaner. The stock tables for my Camaro B3617 have positive values for very cold and hot ECT temps. It seems like they would want to go richer, not leaner under those conditions.

    I'm about to use B3641 for adding fuel when the water injection is off and want to make sure it works like intended. Anyone else have experience using those tables?

    Thanks,
    Dan

    ----------------------- from 7.5.5 (build 74)

    B3617 and B3641
    When in power enrichment mode this value is subtracted from the commanded fuel EQ Ratio.

    See Appendix-B in the Tuning Tool Users Manual for more information about EQ Ratio modifiers.
    2001 Camaro SS
    Built 370 LQ9, Ported 243s, D-1SC 14 psi. 691 rwhp, 643 rwtq
    Best time: 11.6@124 on nitto drags with a 2.1 60'
    "if you're gonna build a time machine into a car, why not do it with some style." Dr. Emmett Brown

  2. #2
    Lifetime Member mr.prick's Avatar
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    Nov 2006
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    3,195

    Default

    build 74?
    You should update your build because both table descriptions say add.
    512k RoadRunner Firmware 12.14R
    FlashScan V2 Bootblock V2.07.04 Firmware V2.07.22 EFILive V7.5.7 (Build 191) V8.2.1 (Build 181)
    LC-1 WBO2

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  3. #3
    Member
    Join Date
    Jan 2008
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    Default

    Damn... Forgot my work computer runs an older version. Build 88 at home says add.
    2001 Camaro SS
    Built 370 LQ9, Ported 243s, D-1SC 14 psi. 691 rwhp, 643 rwtq
    Best time: 11.6@124 on nitto drags with a 2.1 60'
    "if you're gonna build a time machine into a car, why not do it with some style." Dr. Emmett Brown

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