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Thread: AEM Wideband transform question

  1. #1
    Tuner in Training
    Join Date
    Apr 2019
    Location
    Texas
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    16

    AEM Wideband transform question

    I'm using an AEM 30-0300 wideband I've noticed that my wideband reads a little different (.5 to 1 point) than what HPtuners sees when using the proper transform ratio (V/.42105263)+7.3125. For instance my wideband gauge will say I'm at 14.2 and HPtuners says I'm at 15.1. I'm using the same formula that the manual states and what HPtuners has by default. I'm using AFR not lambda.

    I've changed the formula a little to more closely match what my wideband is actually showing me.(V/.45105263)+7.3125 (With in.2-.4 points now)

    Is this typical to have to manually adjust the formula for each wideband or do I just have a wonky one?
    I've done the resistor cal and free air cal with the same results.

    Thanks guys.
    05 Silverado Single Cab Long Bed
    0n3 Turbo 12 PSI
    Snow Stage 2 Meth
    BTR Stage 2 Turbo Cam
    Built 4l80E

  2. #2
    Senior Tuner
    Join Date
    Jan 2014
    Location
    Australia
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    1,087
    u should leave the v/.42105263 as is but just change the +7.3125 to suit the voltage offset u must have that way it adds to correct the offset and not the calculation, what ever u are out by say .5 or 1 subtract that from the 7.3125 and it should dial it straight in

  3. #3
    Tuner in Training
    Join Date
    Apr 2019
    Location
    Texas
    Posts
    16
    Great ill give that a try tomorrow thanks for the reply!