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GM Open Element IAT Sensor with Connector
GM Open Element IAT Sensor with Connector
GM Open Element IAT Sensor with Connector
GM Open Element IAT Sensor with Connector
GM Open Element IAT Sensor with Connector

GM Open Element IAT Sensor with Connector

5 out of 5 based on 1 customer rating
(1 customer review)

$23.00

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Description

These are the proper GM-style sensors for use with the MegaSquirt line of ECUs and come with the weatherproof connector and crimp pins.  One extra crimp pin is included as a spare.  The threads are 3/8″ NPT pipe thread – note that isn’t an actual 3/8″ outer diameter but a pipe thread size based on pipe inner diameter.

IMPORTANT NOTE: The pins for this connector are pull-to-seat! This means you cannot push the pins into the connector from the back.

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What size hole do I need to drill to install this sensor?

  • The hole should be tapped for 3/8″ NPT.  Your tap will come with instructions for the preferred drill size, which is likely to be 9/16″.

What is its resistance vs temperature curve?

  • If you are connecting this to a device that supports 3 point calibration (all MegaSquirt units do), use these numbers if your device does not have a standard GM temperature sensor calibration curve.
    • 7000 ohms at 48 degrees F
    • 1930 ohms at 87 degrees F
    • 560 ohms at 146 degrees F

I am using it with a device that requires a voltage vs temperature curve. What data do I enter?

  • This sensor outputs resistance, not voltage. You will need additional, external circuitry to convert its output into a voltage, and the voltage will depend on the design of the external circuit.

Can I buy the connector separately?

  • Yes. You can order a connector here: GM IAT sensor crimp connector. This is a somewhat different style connector from the one we ship with the sensor, but will connect to the sensor without any problem.

Where exactly should I install this on my engine?

  • We do not recommend threading it into the intake manifold except for supercharged engines where the supercharger attaches directly to the manifold. For all other applications, we recommend installing this sensor in the part of the intake system directly upstream of the throttle body. The reason is that the intake manifold often transfers heat to the sensor by conduction at a faster rate than it transfers heat to the incoming air. While there are ECU settings to compensate for this, mounting the sensor where it does not absorb so much heat will often make tuning easier.

Questions & Answers

    Hi there, what is the typical operating temperatur range of this sensor in the datasheet? Thanks
  1. 0 votes
    Q Hi there, what is the typical operating temperatur range of this sensor in the datasheet? Thanks
    Asked by Peter Scheepers
    A

    We don't have a full data sheet, but I have seen GM temperature sensors give a good reading up to the 250-275 degree F / 120-135 degree C range. Above that range, they start to run out of resolution and accuracy.

  2. What is the bias resistance of the sensor?
  3. 0 votes
    Q What is the bias resistance of the sensor?
    Asked by Myles Maycher
    A

    The bias resistor is a component of the ECU, not the sensor. Most ECUs in the MegaSquirt family have a 2.49K bias resistor.

  4. Hi there, do you have the calibration sheet for this sensor? Thanks
  5. 2 votes
    Q Hi there, do you have the calibration sheet for this sensor? Thanks
    Asked by Michael
    A

    If you are connecting this to a device that supports 3 point calibration (all MegaSquirt units do), use these numbers if your device does not have a standard GM temperature sensor calibration curve.

    • 7000 ohms at 48 degrees F
    • 1930 ohms at 87 degrees F
    • 560 ohms at 146 degrees F
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