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200 Degree Thermostat... POSSIBLE?

Hockeyfm13
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kzimmer

kzimmer

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Sorry to hijack, quick question. Is there any benefit to running that hot aside from getting more heat out of the vents? 180, 190, 200, what's the best temperature and why? Would love to see some data to support the answer. Again, this is a blatant hijack, OP if you aren't ok with it please let me know and I'll make my own post.

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Mopar1973Man

Mopar1973Man

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23 minutes ago, Killer223 said:

won't the computer defuel to lower the temps?

 

No.

 

23 minutes ago, Killer223 said:

Or is that only a CR thing?

 

Yes.

23 minutes ago, Killer223 said:

my truck will run a different fuel map for different coolant temps.

 

24V will change timing based on IAT temperature so if you can get it to rise slightly the timing wil retard a bit and MPG's will climb.

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kzimmer

kzimmer

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That's not quite what I was getting at. Assume I'm running the quad, timing is limited to my settings regardless of ECT. Is there data that exists to suggest the ideal running temperature? Am I losing efficiency or longevity at 180 rather than 190 or 200?

 

Hope that makes sense. I've done some searching but I can only find speculation, aside from a study that @pepsi71ocean did on CF, but I am still very curious.

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Mopar1973Man

Mopar1973Man

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Diesel engine needs compression and heat to fire cold diesel in cold air. So 180*F is not suggested at all because the efficiency falls off. 190*F is OEM and does fine. 200*F could increase efficiency if the IAT rises aiding in ignition quality in cold weather. Colder the air and block thee long it takes for the fuel to ignite.

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pepsi71ocean

pepsi71ocean

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15 hours ago, kzimmer said:

Sorry to hijack, quick question. Is there any benefit to running that hot aside from getting more heat out of the vents? 180, 190, 200, what's the best temperature and why? Would love to see some data to support the answer. Again, this is a blatant hijack, OP if you aren't ok with it please let me know and I'll make my own post.

 

Running around up here in -10 to -20 F weather I was seeing hot temps out of my vents with the 200F tstat. I find it cycles in the 197 to 202 range (after first open). IIRC the vent on max ac was pushing 170-180F out the center vent, you will roast.

 

While nothing solid I did see a difference in fuel economy, and he truck seems to run beer and i is quieter. When running my smarty on stock timing you can clearly hear a audible difference.

 

20 hours ago, Hockeyfm13 said:

Is there a 200 degree thermostat that I can put in my 2001 24 Valve? Can you post the link to one, or a part number? 

The region I'm in sees temps averaging between -15 to 0 degrees Fahrenheit. 

Opinions are always welcome! 

 

You will see a slight difference in warm up times, but once the truck is up to temp a 200F will keep you much warmer then the 190. my 200F cycles 197-202, rather wise my older 190 was 185-195.  Any dodge Tstat from a 2010-2013 should be 200F, they all fit, and are the same diameter. 

Another thing to look into is a winter front, if it is thart cold its better to build one instead of he cardboard theory, as it causes my transmission temperatures to get squirrely.

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kzimmer

kzimmer

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Sounds good, thanks fellas. I actually ended up ordering one last night. Trying to get it here before the weekend so I can put it in before a short road trip this weekend.

 

The only concern I have is summer time, and the engine fan cycling when it shouldn't be needed, which would hurt efficiency. If I find that happens, I'll throw a 190 in. I wish there was a 195.

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pepsi71ocean

pepsi71ocean

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14 minutes ago, kzimmer said:

Sounds good, thanks fellas. I actually ended up ordering one last night. Trying to get it here before the weekend so I can put it in before a short road trip this weekend.

 

The only concern I have is summer time, and the engine fan cycling when it shouldn't be needed, which would hurt efficiency. If I find that happens, I'll throw a 190 in. I wish there was a 195.

 

I've towed all summer long when doing my testing and had zero issues with temperature. I actually believe the radiator on our trucks is over sized for what we do. Ran our kubota tractor up to PA to do some dirt moving for a friend and had no issues moving up and down the foot hills. And summer here is in the 80's and 90's.  I think to overwhelm the coolant system is asking to do more then the truck can pull. With that being said, i had the AC running and i did replace my clutch on fan clutch  as well. 

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