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Discussion Starter · #1 ·
How many have swapped thier 190* for a 180* t-stat? Do you like it and do you notice any difference in performance? I'm thinking of swapping mine this summer since I have all my junk deleted. I also have to do extra driving when It's cold out to get my 190* to open up.
 

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I had to change mine today wish I had gotten a 180. It did run pretty good with the 190 stuck open though. Well until we got this freakishly cold weather and the truck would never warm up decided I was sick of freezing my a$$ off everywhere I went so I changed it.
 

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We run 180s in our Jeeps in the summer to help the cooling and to fool the computer into allowing more spark advance and fuel therefore more power. I could see some of the same cooling benefits with the Cummins. But just like the old days, you have to change back for the cold months or you freeze.
 

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No you wouldn't freeze. Heater will blow warm with the gauge below 140. You wouldn't want anything less than a 180 on a diesel they run better when they get warmed up. But I think mine did do a little better on gas when it was running a little cooler do to my sticking thermostat.
 

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Discussion Starter · #5 ·
The reason behind changing to a 180 is because that is what the 5.9's run I believe. Since all the emissions are deleted I figured it wouldn't hurt.
 

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No you wouldn't freeze. Heater will blow warm with the gauge below 140. You wouldn't want anything less than a 180 on a diesel they run better when they get warmed up. But I think mine did do a little better on gas when it was running a little cooler do to my sticking thermostat.
OK, "freeze" is obviously a figure of speech. Let's put it this way, in this part of the world, running a 180 t-stat you won't get enough heat to be comfortable in the cab in the winter. At anything below -20C it will be down right cold in there. Even with a winter front this will be the case.
 

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I run the 180* t-stat in the summer and when i tow the temp is about 20* cooler then i swap back in the stocker in the winter. Seems to work for where i live.
 
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