180* Thermo - When should fans come on?
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I think I have mine coming on at 188*... but I cant check it right now (at work)
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32 on the highway and 25 mixed driving..........
I'm pretty sure I know what I'm doing... this isnt my first rodeo [rolleyes]
Setting your fan turn on temps that high in winter doesnt accomplish anything, it may warm up past 180* if you let it set long enough but as soon as you start moving you temps will go right back down to 180* .....havent you even logged your temps in winter???
I know for a fact that in summer with a 180* T-stat that when you drive down the high way your coolent doesnt get above 180-185* and in the winter it sees those numbers even less often (especially with 32* air moving through it as you drive)
I'm pretty sure I know what I'm doing... this isnt my first rodeo [rolleyes]
Setting your fan turn on temps that high in winter doesnt accomplish anything, it may warm up past 180* if you let it set long enough but as soon as you start moving you temps will go right back down to 180* .....havent you even logged your temps in winter???
I know for a fact that in summer with a 180* T-stat that when you drive down the high way your coolent doesnt get above 180-185* and in the winter it sees those numbers even less often (especially with 32* air moving through it as you drive)
what are the advantages of running a cooler thermostat anyway? Pardon my thread jack and my stupidity.
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975 Posts
yes i have logged them. im not going to start an argument because i know u know alot more than i do, but i know for sure 100% that changing the temp that the fans kick on will make the car run hotter or cooler. ill take a pic of my SCT this morning on the way to work on the highway doing 75mph.
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11,906 Posts
From a PERFORMANCE stand point .... ABSOLUELTY
Last summer I removed ALL of my AC stuff from the car (especially the condensor) and went datalogging.... on earlier datalogs the coolant temps would be in the mid to high 180's on the highway and they would creep up in the high 190's - low 200's in town during heavy traffic.
After the removal my highway temps never got above 180* (where the T-stat opens) and intown never got past 188* where the fans came on... I've never seen my fans come on in the winter (I live in southern Ohio) with them set at 188* simply because the cold air during winter keeps it cold enough to prevent the fans from coming on.... so setting the fans at 195-200* doesnt do a thing... since the cooling system is still going to open and circulate at 180*.... just like the T-stat is intended to do.
The cooler your car runs (coolant wise) the lower your combustion chamber temps will be... in turn this helps to lower the chances of detonation, and a plus is you can run a tad more timing (timing is POWER)
Last summer I removed ALL of my AC stuff from the car (especially the condensor) and went datalogging.... on earlier datalogs the coolant temps would be in the mid to high 180's on the highway and they would creep up in the high 190's - low 200's in town during heavy traffic.
After the removal my highway temps never got above 180* (where the T-stat opens) and intown never got past 188* where the fans came on... I've never seen my fans come on in the winter (I live in southern Ohio) with them set at 188* simply because the cold air during winter keeps it cold enough to prevent the fans from coming on.... so setting the fans at 195-200* doesnt do a thing... since the cooling system is still going to open and circulate at 180*.... just like the T-stat is intended to do.
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If your cooling system is working properly and you have a 180* thermo in the car the fans should never kick on while driving down the highway.... if it does get hot enough then you either have something wrong somewhere (thermo sticking or air pocket in the system) or you have a 192* thermo in the car.
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31,102 Posts
Temp has little to do with engine life unless it gets hot enough to do damage but to cool isnt an issue , I wouldnt go install a 160 thurmostat tho thinking that much cooler is better
Auto makers have started taking the temps higher more for emmissions then anything , they have found higher water temps help to burn off more making it easier to pass the newer each year federal giudelines and in some cases higher temps in some cars also helps MPG , dont know that I have seen this with the Focus tho
With a 180 I set the fans to 190, Keep in mind that if your cooling system is going its job the only time fans should come on is at low speed and idle , moving you shouldnt even need the fans on the car
Tom
Tom
Auto makers have started taking the temps higher more for emmissions then anything , they have found higher water temps help to burn off more making it easier to pass the newer each year federal giudelines and in some cases higher temps in some cars also helps MPG , dont know that I have seen this with the Focus tho
With a 180 I set the fans to 190, Keep in mind that if your cooling system is going its job the only time fans should come on is at low speed and idle , moving you shouldnt even need the fans on the car
Tom
Tom
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Thanks for the info 03orangeSVT!
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31,102 Posts
Lowering the Fan temp for the HWY , I doubt will see any change in lowering the water temp
Tom
Tom
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11,906 Posts
You may have a problem somewheres else.... 200* coolant temp when it 5* outside is definitly a sign that something is wrong.
Especially since you said that you have a 180* thermo in the car.
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