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Time to Temp. Sitting Idle vs. Start and drive to warm up

Discussion in 'Technical Chat' started by chris4x4, Dec 31, 2012.

  1. Dec 31, 2012 at 8:24 PM
    #1
    chris4x4

    chris4x4 [OP] With sufficient thrust, pigs fly just fine. Staff Member

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    FlimFlubberJAM
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    Over the last week, I have done a few tests regarding how long it takes the vehicle to warm up using different methods. I have found the following:

    starting at 37*
    Start up, and drive off in a regular fashion (Speed limit, normal acceleration)
    it took 4 mins. 40 seconds for the engine to reach 180*. I didnt use the heater until engine at operating temp.

    Starting at 39*
    Start up, and drive off in a regular fashion (Speed limit, normal acceleration)
    Turning on heater at 125*, temp set to max heat, fan on high, it took 8 mins to reach 180*. Note: It took 3 mins to hit 125*, but took longer once the heater was turned on.

    Starting at 37*
    Start up, and let engine idle until 180* took 16 mins. :eek:


    Starting at 38*
    Start engine, sit for 4 mins, then drive off took 8 mins 50 seconds to reach 180*

    Starting at 40*
    start engine, and drive off with liberal throttle applications where able (full throttle onto the freeway, up to 65 mph).
    4 mins. 20 seconds to reach 180*.





    MPG notes. For 1 week, I let my engine idle for 10 mins before driving off. My MPG was 17.5 mpg.

    For 1 week I drove imediately after starting truck, and MPG was 19.1

    Same route and times during these tests, and and I tried to keep my average within 2 mph of the other tests.
     
  2. Dec 31, 2012 at 8:33 PM
    #2
    NelsonTacoma

    NelsonTacoma This is my derpawayinator!!!!!

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    So, it would seem that starting up and just going is the best bet to get heater operation sooner. Nice!! :thumbsup:

    Edit: Better gas mileage too!!
     
  3. Dec 31, 2012 at 8:34 PM
    #3
    Jerez

    Jerez SoCal LED Dash Swap

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    Half LT dont count
    wow good to know...lately i had noticed that it took forever for my truck to warm up if i turn it on and go with the heater on...:anonymous:
     
  4. Dec 31, 2012 at 8:35 PM
    #4
    chris4x4

    chris4x4 [OP] With sufficient thrust, pigs fly just fine. Staff Member

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    yeah, That supprised me, but being as the heater, is an heat exchanger using engine coolant, it makes sense.
     
  5. Dec 31, 2012 at 8:42 PM
    #5
    Jerez

    Jerez SoCal LED Dash Swap

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    Half LT dont count
    true, i never put much thought into it because i was probably half asleep and super cold haha

    but good to know, thanks for the info
     
  6. Dec 31, 2012 at 8:46 PM
    #6
    ChamYota

    ChamYota AKA Crash Bandicoot

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    :cool:

    Good information as usual!

    Gotta love TW! :D
     
  7. Dec 31, 2012 at 8:47 PM
    #7
    Rich91710

    Rich91710 Well-Known Member

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    39 is super cold?

    That's what it's been the last week when I leave at 5am.
     
  8. Dec 31, 2012 at 8:54 PM
    #8
    Murman

    Murman Well-Known Member

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    That's a no-brainer. While idling, your truck gets exactly 0mpg.
     
  9. Dec 31, 2012 at 9:07 PM
    #9
    chris4x4

    chris4x4 [OP] With sufficient thrust, pigs fly just fine. Staff Member

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    Thats the temps its been here lately. its gonna be closer to 30* tonight..
     
  10. Dec 31, 2012 at 9:10 PM
    #10
    Rich91710

    Rich91710 Well-Known Member

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  11. Dec 31, 2012 at 9:12 PM
    #11
    NelsonTacoma

    NelsonTacoma This is my derpawayinator!!!!!

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    Are you sure about that?:rolleyes:
     
  12. Dec 31, 2012 at 9:15 PM
    #12
    Jerez

    Jerez SoCal LED Dash Swap

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    Half LT dont count
    Yup...we live in SoCal: sorry lol :cool:

    Also I went out to 7-11 real quick and ran with the header full blast, (2 miles away) left it on cuz I have remote start, was inside for about 10 mins and the needle had just gone up a bit when I got back

    I let my friend borrow my scan gauge so idk what temp it could be
     
  13. Dec 31, 2012 at 9:19 PM
    #13
    Rich91710

    Rich91710 Well-Known Member

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    I live about 3 blocks off the 60, 1 block off of Central.

    I'm just starting to get heat as I'm making the left turn onto the ramp... but it's not enough heat to make it tolerable to turn on the defroster and it pisses me off.

    I really need to do the white wire mod to kill the compressor unless I want it.
     
  14. Dec 31, 2012 at 9:21 PM
    #14
    169.254.255.201

    169.254.255.201 Well-Known Member

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    That's interesting! Thanks Chris!

    Got you some popcorn..:popcorn:
     
  15. Dec 31, 2012 at 9:47 PM
    #15
    chris4x4

    chris4x4 [OP] With sufficient thrust, pigs fly just fine. Staff Member

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    yes, but I, myself, wasnt sure exactly how much letting it idle impacts overall MPG.
    NOMS!!! :popcorn:
     
  16. Dec 31, 2012 at 11:35 PM
    #16
    Btnewman

    Btnewman Benjamin Newman

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    Remember: idling gets you nowhere...
     
  17. Dec 31, 2012 at 11:39 PM
    #17
    OZ-T

    OZ-T All of those moments....will be lost.....in time

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    What about when it's actually cold out
     
  18. Jan 1, 2013 at 8:40 AM
    #18
    claymore

    claymore Well-Known Member

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    Thought I would add results to Chris's test, New Mexico style.

    Out side temp. (I know this is not cold to Oz)
    [​IMG]

    Driving normal for New Mexico....:D



    4 minutes 05 seconds later, no heater on. Not sure of the temp, but this is about the normal operating temperature.

    [​IMG]
     
  19. Jan 1, 2013 at 10:11 AM
    #19
    chris4x4

    chris4x4 [OP] With sufficient thrust, pigs fly just fine. Staff Member

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    I removed your pic of excessive speeding. Thats not allowed. As for the gauge, the gauge hits the "Normal" range at 130*, and doesnt move from its spot until it goes over 212*. Its not that accurate. All my results were done using an Ultra gauge.
     
  20. Jan 1, 2013 at 12:57 PM
    #20
    Rich91710

    Rich91710 Well-Known Member

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    TX and NM are 80 on the interstate ;)
     
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