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Thread: Barometer rise under boost

  1. #1
    Tuner JnJSpdShop's Avatar
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    Aug 2005
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    Barometer rise under boost

    I was wondering if there is something I am missing. The car is a 2015 Corvette LT1 with an A&A supercharger kit. The car has methanol and the IAT and BARO sensor are both broken out with the DSX harness. The ZR1 MAP sensor went into the intake and the stock MAP went on the harness and is zip tied underneath the intake manifold. The dyno pull starts at 98.5 kpa and ends at 108 kpa. What am I missing??
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  2. #2
    Advanced Tuner
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    Would be nice to get an answer

  3. #3
    Advanced Tuner
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    Aug 2010
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    Probably wrong pressure sensor configuration. Hard to say without the file..

  4. #4
    Tuner
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    Apr 2014
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    North Dakota
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    Try disabling the P0101 test and maxing out the Barometric Pressure Sensor (P2227) values found under Engine Diag > Airflow.
    My setup is different, using a dedicated BARO sensor, but these tests seemed to make adjustments to the BARO reading instead of just being Pass/Fail tests. Disabling them made my BARO sensor reading stable.
    2014 Silverado L83 | Knockoff S369 Turbo | LT1 Fuel Pump and Injectors | MAST L84 Port Intake | MS3Pro Secondary Fuel Computer

  5. #5
    So how do we measure the correct boost? Take everything from 101kpa, 98kpa, or 108kpa to find the correct boost pressure.

    So WOT 143KPA = 6.1psi

  6. #6
    Advanced Tuner
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    Need to set sensor config to "NA-MAP"

  7. #7
    Advanced Tuner Ghostnotes's Avatar
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    Feb 2012
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    Houston, TX
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    Quote Originally Posted by sevinn View Post
    Need to set sensor config to "NA-MAP"

    Hmmmmm

    I've left mine as is since I put my A&A on 2 years ago. I'm using a breakout cable but now my baro is stable now.
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