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Thread: Logging AEM 5 bar for exhaust pressure

  1. #1
    Potential Tuner
    Join Date
    Feb 2010
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    9

    Logging AEM 5 bar for exhaust pressure

    This shouldn't be hard, but having trouble. I'd like to log exhaust pressure with this AEM 5v sensor (30-2131-75). I have the voltage table, but not sure on the next steps within EIO input.

    In the scanner, i'm under...

    Aux Input list, User Defined, Configure user defined, then what?

    AEM Data on sensor: http://www.aemelectronics.com/files/info/30-2131-75.pdf

    Thanks for any help guys.
    -Rob Melcher

    2004 GMC RST: 4.8L/Turbo/E85: 617HP/623TQ
    http://www.youtube.com/watch?v=V9nRm6vZl_I
    91 Eagle Talon 2.0L/Turbo/E85-10.61@136, 570AWHP Mustang Dyno
    http://www.youtube.com/watch?v=yB9kDxXRLgw

  2. #2
    Potential Tuner
    Join Date
    Feb 2010
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    9
    Think I got it figured out. Would I be correct in going under "list", then entering the data -14.700 at .5, then 60.300 at 4.5. Then clean it up taking -14.700 down to .0 and 60.300 up to 5.0
    Last edited by Foose04; 03-12-2012 at 10:37 PM.

    2004 GMC RST: 4.8L/Turbo/E85: 617HP/623TQ
    http://www.youtube.com/watch?v=V9nRm6vZl_I
    91 Eagle Talon 2.0L/Turbo/E85-10.61@136, 570AWHP Mustang Dyno
    http://www.youtube.com/watch?v=yB9kDxXRLgw

  3. #3
    Advanced Tuner sarg's Avatar
    Join Date
    Aug 2011
    Location
    Atlanta, GA
    Posts
    305
    I would think that entering in the exact voltage that the sensor calls for would be the best way. Other wise all readings will be off. Try it with the recommended setting and make sure it reads 0 or close to it with the car off.

  4. #4
    Advanced Tuner
    Join Date
    Jun 2008
    Location
    Charleston, SC
    Posts
    969
    (Volts/((volt range)/scale range)+(lower limit)

    Using PSI
    (Volts/((4.5-0.5)/(-14.7-60.3))+(-14.7)
    (Volts/(4.0/75)+(-14.7)

    Volts/
    0.0533333333 + -14.7

    Using KPA
    0.0077556 + 0

    -Carl