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    Default Possible False Lean At Idle

    I have a BBF 521 with a Holley Dominator. We got it running earlier this spring and it's running really well. My tune targets 14.0/1 at idle but it smells a little gassy to me and I wonder if I could be experiencing the false lean condition from large cam overlap that the manual talks about. My cam isn't quite as large as the example given in the manual, but it has a decent amount of overlap. Should I try moving my Closed Loop threshold above 1500 RPM and lean the Base Fuel Table a bit around idle? Some specs below and my Global File is attached:

    521 BBF
    Kaase P-51 heads
    Dominator non-sequential MPFI
    Injectors: Holley 522-668 66 lb/hr

    Straub S98060
    Cam Type Hyd Roller
    Serial Nb S98060
    Grind Nb FF 299/318-09HR

    Intake Exhaust
    Lobe Lift 0.3677" 0.3420"
    1.73 Ratio 0.636" 0.592"

    Centerline Angle 103° 115°
    LSA 109°
    Overlap 33.5°
    Duration @ .050" 243° 260°
    Duration @ .015"
    Duration @ .006" 299° 218°

    Timing @ .050":
    Open 18.5° BTDC 65° BBDC
    Close 44.5° ABDC 15° ATDC
    ================================================== ====
    Attached Files Attached Files
    Last edited by dalcini; 06-05-2019 at 01:02 PM.

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