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Thread: IAT sensor calibration?

  1. #1
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    IAT sensor calibration?

    Is there a table or tables you need to adjust for different IAT sensors or are they all the same? I need to make sure the data in the tune is correct for my IAT sensor. I was running a 5-wire MAF with integrated IAT then switched to SD and deleted the MAF and bought an IAT from 1998 Camaro 5.7L part#2ATS7 and installed with a breakout harness. I have a ls1 pcm out of a 2002 camaro sport coupe.

    I can't really find any tables that allow you to adjust IAT Temp vs IAT voltage. The only tables I see with IAT are the Spark Advance.

    Thanks for any clarification.
    Torque_Vector
    408ci stroker LS3 1998 BMW 323is - 490RWHP 466RWT in 100 degree weather
    260cc CNC Ported PRC heads, 11.25:1 Compression, 4" stroke, 242/250 .615/.615", Nick Williams 92mm TB, LS3 intake/fuel rails, FAST 39# INJ, 3" x-pipe dual exhaust

    Additions: ID1300 INJ, Flex Fuel Sensor, Aeromotive 5GPM variable speed Fuel Pump...

  2. #2
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    The CLT and IAT have the same resistance curves and they haven't changed for quite some time. The 98 Camaro sensor will work just fine. I use the external IAT Corvette part and get the grommet at the same time, but the F body one is the same IIRC.

  3. #3
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    Mmmm well... I went from '99 LS1 to a LS3 with a card type MAF and the curve definitely wasn't the same, and it did make a difference.. Below, where the IAT cal is in my 99 ECU...

    kr D.

    99 TA, Texas Speed LS376, PRC heads, 233/239 cam, Fast 92mm, 95mm TB, card style MAF, Tick TR6060, Strange 4.11 12 bolt axle & clutchpack diff, Strano springs/dampers, Vette 18" wheels, Vette disks, CTS-V calipers, 16lb flywheel, long tube headers, no cats.

  4. #4
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    LS3 is not a Gen3. Gen3 sensors have the same resistance curves as those from the early 90s.

  5. #5
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    Quote Originally Posted by matty b View Post
    The CLT and IAT have the same resistance curves and they haven't changed for quite some time. The 98 Camaro sensor will work just fine. I use the external IAT Corvette part and get the grommet at the same time, but the F body one is the same IIRC.
    That is what I was assuming, but I like verification lol. Thank you.
    Torque_Vector
    408ci stroker LS3 1998 BMW 323is - 490RWHP 466RWT in 100 degree weather
    260cc CNC Ported PRC heads, 11.25:1 Compression, 4" stroke, 242/250 .615/.615", Nick Williams 92mm TB, LS3 intake/fuel rails, FAST 39# INJ, 3" x-pipe dual exhaust

    Additions: ID1300 INJ, Flex Fuel Sensor, Aeromotive 5GPM variable speed Fuel Pump...