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Thread: Holley 3 Bar MAP scaling?

  1. #1
    Senior Member
    Join Date
    Jun 2008
    Posts
    117

    Default Holley 3 Bar MAP scaling?

    Anyone have the MAP Sensor Scaler/Offset settings for the Holley 554-107 3 Bar MAP?
    -John

    1991 RCSB 2WD Sierra LQ4 swap, 220/224 112 cam, Twin VSR 6766 turbos
    4L80e w/shift kit, PY 3600, and 3.73 gears.
    22 PSI and E85, 4300# with driver. 9.7@138, 1.47 sixty
    :drivin:

  2. #2
    Lifetime Member ChipsByAl's Avatar
    Join Date
    Feb 2006
    Posts
    617

    Default

    That looks like the old design MAP sensor from the 80's or 90's. Not sure of the scaling on one compared to the new design sensors. If you can't get it worked out with manual testing Holley does offer an adapter.

    HOLLEY EFI LS MAIN HARNESS TO LS3-STYLE MAP SENSOR ADAPTER
    Adapter Harness
    PART# 558-416
    "Trash that carb and get Injected!"

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