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

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Old 12-31-2012, 08:24 PM   #1
chris4x4 [OP] chris4x4 is offline
With sufficient thrust, pigs fly just fine.
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Time to Temp. Sitting Idle vs. Start and drive to warm up

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.


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.
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Old 12-31-2012, 08:33 PM   #2
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So, it would seem that starting up and just going is the best bet to get heater operation sooner. Nice!!

Edit: Better gas mileage too!!
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Old 12-31-2012, 08:34 PM   #3
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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...
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Old 12-31-2012, 08:35 PM   #4
chris4x4 [OP] chris4x4 is offline
With sufficient thrust, pigs fly just fine.
chris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shed
 
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Quote:
Originally Posted by Jerez View Post
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...
yeah, That supprised me, but being as the heater, is an heat exchanger using engine coolant, it makes sense.
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Old 12-31-2012, 08:42 PM   #5
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Quote:
Originally Posted by chris4x4 View Post
yeah, That supprised me, but being as the heater, is an heat exchanger using engine coolant, it makes sense.
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
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Old 12-31-2012, 08:47 PM   #7
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Quote:
Originally Posted by Jerez View Post
true, i never put much thought into it because i was probably half asleep and super cold haha
39 is super cold?

That's what it's been the last week when I leave at 5am.
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Old 12-31-2012, 08:54 PM   #8
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Quote:
Originally Posted by NelsonTacoma View Post
So, it would seem that starting up and just going is the best bet to get heater operation sooner. Nice!!

Edit: Better gas mileage too!!
That's a no-brainer. While idling, your truck gets exactly 0mpg.
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Old 12-31-2012, 09:07 PM   #9
chris4x4 [OP] chris4x4 is offline
With sufficient thrust, pigs fly just fine.
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Quote:
Originally Posted by Rich91710 View Post
39 is super cold?

That's what it's been the last week when I leave at 5am.
Thats the temps its been here lately. its gonna be closer to 30* tonight..
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Old 12-31-2012, 09:10 PM   #10
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Quote:
Originally Posted by chris4x4 View Post
Thats the temps its been here lately. its gonna be closer to 30* tonight..
Same here... 32... but I don't have to go to work until Wednesday so I don't care.

OTOH, even if I did have to go to work....

http://www.youtube.com/watch?v=utRtw...ctr=1357018805
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Old 12-31-2012, 09:12 PM   #11
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Quote:
Originally Posted by Murman View Post
That's a no-brainer. While idling, your truck gets exactly 0mpg.
Are you sure about that?
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Old 12-31-2012, 09:15 PM   #12
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Quote:
Originally Posted by Rich91710 View Post
39 is super cold?

That's what it's been the last week when I leave at 5am.
Yup...we live in SoCal: sorry lol

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
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Old 12-31-2012, 09:19 PM   #13
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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.
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Old 12-31-2012, 09:21 PM   #14
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That's interesting! Thanks Chris!

Got you some popcorn..
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Old 12-31-2012, 09:47 PM   #15
chris4x4 [OP] chris4x4 is offline
With sufficient thrust, pigs fly just fine.
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Quote:
Originally Posted by Murman View Post
That's a no-brainer. While idling, your truck gets exactly 0mpg.
yes, but I, myself, wasnt sure exactly how much letting it idle impacts overall MPG.
Quote:
Originally Posted by jonantel View Post
That's interesting! Thanks Chris!

Got you some popcorn..
NOMS!!!
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Old 12-31-2012, 11:35 PM   #16
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Remember: idling gets you nowhere...
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Old 01-01-2013, 08:40 AM   #18
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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)


Driving normal for New Mexico....



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

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Old 01-01-2013, 10:11 AM   #19
chris4x4 [OP] chris4x4 is offline
With sufficient thrust, pigs fly just fine.
chris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shed
 
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Quote:
Originally Posted by claymore View Post
Thought I would add results to Chris's test, New Mexico style.

Out side temp. (I know this is not cold to Oz)


Driving normal for New Mexico....



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

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.
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Old 01-01-2013, 12:57 PM   #20
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Quote:
Originally Posted by chris4x4 View Post
I removed your pic of excessive speeding.
TX and NM are 80 on the interstate
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