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  1. #1
    Low Profile
    Join Date
    Jun 2012
    Thanked 16 Times in 5 Posts

    Scanguage Intake Air Temp - where is it measuring?

    For the H3, where is Scangauge getting the data from? Is this a good measure of under hood temps?

    Before I cut vents under the hood louvers I want to compare if my under hood temps will actually drop.

  2. #2
    Mr. Beretta
    Join Date
    Sep 2011
    Who cares!
    Thanked 615 Times in 378 Posts
    Intake air temp is a measurement of the airflow into the engine, just past the air filter housing. The sensor is actually part of the mass airflow sensor.

    Don't know anything about Hummers, but I do speak Malamute.

  3. The Following User Says Thank You to f5moab For This Useful Post:

    M22KLARS (07-14-2012)

  4. #3
    Join Date
    Sep 2011
    Colorado - Sometimes Park County; usually Colo Springs
    Thanked 122 Times in 95 Posts
    The intake for air into the engine is drawing air from the fender and the outside of the engine compartment. Theoretically, one could take the hood off and the intake air temp would be the same as with the hood closed. A vent, IMHO, would only be allowing ambient block temp and the radiator temp to draw some heat off as the air moves into the engine compartment from under the bumper and "should" draw out the louvers. Unless there is a dead area of air moving over the hood, hitting the windshield and tumbling the airflow. It is possible that the louver will not actually change the airflow. Louvers on the fenders could change the airflow pattern.

    Has anyone had an engine failure due to excessive heat? I really don't know because I don't live in a high heat area.
    Cheers, Doug In Colorado
    K0LEF 146.460 simplex

    I am sorry that everyone cannot own a Hummer; some folks have to drive a Jeep or a Toyota.

  5. #4
    Street Tire
    Join Date
    Sep 2011
    South Africa
    Thanked 54 Times in 39 Posts
    With my previous 3.7liter H3 and snorkel my Air intake temperature was 1 or 2 degrees celsius higher than the ambient temperature displayed in the rear view mirror. I have not yet installed a snorkel on the V8, as there's no local stock and we are awaiting shipment from Auz. The temperature of the V8 air intake is 6-8 degrees celsius warmer than the ambient currently while driving on the open road, when hitting city traffic the temperature difference increases to above 25 degrees. Unfortunately I cant find any photo's I have taken of this, but I'm anqious to get the Snorkel fitted and see if there's a significant improvement in temperatures.

    I'm planning a trip to Namibie in December/ January and the ambient temp there will be 38-45 Degrees Celsius (100-113 F) and I don't want any possible heat issues when driving in the dunes
    Last edited by Sennin; 07-13-2012 at 02:17 AM.
    2010 Hummer H3 V8 Adventure:
    INSTALLED: 37" Maxxis Treps, 4" Rancho suspension lift, 2" Custom Body Lift, 2" wheel spacers, 2nd D shackle at back, Cranked Torsion Bars, ARB Bullbar, Warn 9500XP winch, synthetic winch rope, Lightforce 240 HID spots, Bullydog Watchdog parameter monitor, aftermarket TPMS, Safari Snorkel, African Outback Roof-rack, roof mounted long range tank, Maggiolina rooftop tent, 60W solar panel, Eazy awning, Performance exhaust and headers, cold air intake, Hood Louvre handles,custom UC skid-plate, rear Hunner skids, load bay box, PCMofNC software upgrade, 4.1 to 4.56 diffs re-geared, duel battery system with D250S solar charging, trailer power cable connect, Hummer roof mounted off-road lights, Trucool 40 000 BTU ATF cooler, motorised AMP Research side steps.

    STILL TO BE RE INSTALLED: Will it ever end? I hope not


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