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I have a Dodge Challenger scat pack wide body 2020 I would like to know wich is the best or recommended thermostat to lower the temperature.
 

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Just leave it alone. The thermostat that is in it now protects your power train warranty. Going to a lower temp, like a 180 won't really make any difference and you need the fans reprogrammed to take any advantage of it.
 

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Dorman makes most OEM ones as for Heat Range leave what they put in the car if replacing is needed same factory spec temp is best per programming and design.
 

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Without some help your ECU will light up a warning light if the engine don’t get as hot as it likes after a few cycles.
 

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will need a unlock pcm and some form of tuning in order to adjust fans and prevent mil from illuminating

any unlocking of the pcm will affect your power train warranty
 

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The cooling specifications of the car are what they are. Putting a "lower" thermostat will achieve little but opening the thermo port sooner - but the engine will ultimately reach it's design goal. People think putting a lower opening thermostat will make their engine run cooler (and hence reduce "heat soak" power loss). Nope.
 

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The cooling specifications of the car are what they are. Putting a "lower" thermostat will achieve little but opening the thermo port sooner - but the engine will ultimately reach it's design goal. People think putting a lower opening thermostat will make their engine run cooler (and hence reduce "heat soak" power loss). Nope.
correct, only benefit is when you are supercharging etc
 

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The cooling specifications of the car are what they are. Putting a "lower" thermostat will achieve little but opening the thermo port sooner - but the engine will ultimately reach it's design goal. People think putting a lower opening thermostat will make their engine run cooler (and hence reduce "heat soak" power loss). Nope.
exactly.
 

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The temp rating of a t-stat tells you the minimum temp it will allow you to run, unless you live in the Arctic Circle. They are all the same when fully opened. Open.

So if you upgrade your cooling system to a thicker radiator, to dual fans, you will be doing more for your cooling than a lower t-stat.
Tuners have reasons for specifying a 180°F but you will have to ask one. There are lots of ECM parameters that involve ECT.

I run a 180°F as instructed but also have the thicker Severe Duty II Radiator and dual fans. In the Atlanta area peak summer heat in city traffic it comes in handy keeping it around 200°F - 205°F with the fans rarely coming on at high speed @209°F taking it down to 195°F. This is usually in a traffic jam or long drive through line.

Yeh, if you go cooler your fans will run on high more often and longer.
 
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