180 or 203 degree themostst?

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    Author Topic: 180 or 203 degree themostst?  (Read 853 times)

    Offline thedodgeboys

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    180 or 203 degree themostst?
    « on: August 31, 2008 - 03:41:03 PM »
    My 6.1 hemi came with a 203 degree thermostat should I change it to a 180 or 190?
    203 seams kind hot I know the factory need them that hot for emissions but do I?
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    Offline Supercuda

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    Re: 180 or 203 degree themostst?
    « Reply #1 on: August 31, 2008 - 05:59:10 PM »
    Personally, I wouldn't change it. Why mess with a good thing? You won't really get anything out of it without at least modifying the PCM programming. It will eventually get that warm, anyway. The higher opening point just ensures that you get there more quickly.
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    Offline 73Chally

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    Re: 180 or 203 degree themostst?
    « Reply #2 on: August 31, 2008 - 06:01:05 PM »
     :iagree: I would like to think that they went with 203 for a reason, and it might throw off a bunch of the other sensors if you change it, plus could void any warranty if push came to shove.
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    Offline 422STROKER

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    Re: 180 or 203 degree themostst?
    « Reply #3 on: August 31, 2008 - 06:12:09 PM »
    I'll ask my buddy with the Srt-8 300 what he uses, He runs 12.6's at 112 in the quarter and commutes with it too. 

    Tom :scared:
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    Offline thedodgeboys

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    Re: 180 or 203 degree themostst?
    « Reply #4 on: August 31, 2008 - 06:17:31 PM »
    Cool thanks Tom  :thumbsup:

    i can tune for the temp I just dont know what is best for the motor?
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    Offline 73Chally

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    Re: 180 or 203 degree themostst?
    « Reply #5 on: August 31, 2008 - 08:31:28 PM »
    Oops.  Thought you meant you had it in a new car.  If it's programmable then never mind what I said.
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    Offline 6packCuda

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    Re: 180 or 203 degree themostst?
    « Reply #6 on: August 31, 2008 - 10:32:52 PM »
    I'd keep at least a 195 in there. The newer fuel injection systems are much more efficient in a warmer engine. 180 is too cold.
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    Dave
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