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Thread: what is normal operating ect?

  1. #1
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    Default what is normal operating ect?

    i went for a little drive for the first time to do some data loggin and realized that my ect average is 214 f.
    ut went as high as 217 f . is this about right? i have a 160 termostat also.
    2000 NBM trans am.
    427 Dart ship block,Lme ported Ls7 heads 12.5 compression
    246/262 .730/.712 112+4 low lash solid roller
    Rmvb 4l80 with transbrake, 8" FTI converter
    12 bolt Moser rear end with 4.10 gears

  2. #2
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    this is in the trans am by the way
    2000 NBM trans am.
    427 Dart ship block,Lme ported Ls7 heads 12.5 compression
    246/262 .730/.712 112+4 low lash solid roller
    Rmvb 4l80 with transbrake, 8" FTI converter
    12 bolt Moser rear end with 4.10 gears

  3. #3
    Lifetime Member SSpdDmon's Avatar
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    It depends on the weather and what your fans are set at.

    I see 180~190*F (A/C off) while cruising around. But, we don't usually see more than 85~90*F days here in MI and my fan on/off temps have been dropped 40*F from stock.

    The fact that you have a 160*F stat only means your stat opens at 160*F. It's not going to make the engine run cooler. It will allow it to run cooler under the appropriate conditions. But, it won't make it...

  4. #4
    Joe (Moderator) joecar's Avatar
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    While observing ECT, use bidirectional mode in the scantool to turn fans on at high speed...

    if after a few minutes ECT starts to drop closer to thermostat temp (+5~10 degrees), then everything's fine, you just need to adjust your fan temps...

    otherwise if ECT doesn't drop you have an airflow and/or cooling system problem.

  5. #5
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    I have not scanned it with the snap on yet but it always showed avg temp to be around 187 in my car. this is the first time I ever scanned the t/a with the efi live .

    fan temps should not play to much of a part when cruising on the interstate at 70 mph . the airflow should be sufficient with the cruising speed. it still held 214 on a 5 mile 70 mph trip.
    2000 NBM trans am.
    427 Dart ship block,Lme ported Ls7 heads 12.5 compression
    246/262 .730/.712 112+4 low lash solid roller
    Rmvb 4l80 with transbrake, 8" FTI converter
    12 bolt Moser rear end with 4.10 gears

  6. #6
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    when I get to my laptop I am going to try to post what I data logged to let you all look at it and see what I was reading.
    2000 NBM trans am.
    427 Dart ship block,Lme ported Ls7 heads 12.5 compression
    246/262 .730/.712 112+4 low lash solid roller
    Rmvb 4l80 with transbrake, 8" FTI converter
    12 bolt Moser rear end with 4.10 gears

  7. #7
    Joe (Moderator) joecar's Avatar
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    Quote Originally Posted by Aint Skeered
    I have not scanned it with the snap on yet but it always showed avg temp to be around 187 in my car. this is the first time I ever scanned the t/a with the efi live .

    fan temps should not play to much of a part when cruising on the interstate at 70 mph . the airflow should be sufficient with the cruising speed. it still held 214 on a 5 mile 70 mph trip.
    This indicates a problem... with your TS you should have seen something like 170-175.

    (I assume you weren't pulling a big load up a steep hill for 5 miles... )

  8. #8
    Lifetime Member TAQuickness's Avatar
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    you might check under the nose to make sure you haven't picked up a walmart bag or other debris that would block air flow.

    FWIW, my bird run's 190-192 *F AC on or off


  9. #9
    Joe (Moderator) joecar's Avatar
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    Mine runs at 196 with AC on or off.

  10. #10
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    H]2021[/ATTACH]

    here is the file. let me know what all you see going on. I posted this tune before and was told to start over as it has a lot to be desired but I dont have a wide band yet so it has to wait till i get one. I drove slow all the way up to the 1650 to 1750 frame where i made a little hit.
    Attached Files Attached Files
    2000 NBM trans am.
    427 Dart ship block,Lme ported Ls7 heads 12.5 compression
    246/262 .730/.712 112+4 low lash solid roller
    Rmvb 4l80 with transbrake, 8" FTI converter
    12 bolt Moser rear end with 4.10 gears

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