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i heard that running a 180 thermostat would make the car run rich on fuel.......because its so cool as opposed to the usual 200 degree temps......also i hear that most cai's make the srt4 run slightly hot. if you got both would it even it out???? also has anyone noticed any difference as far as performance with the new thermostat?
 

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a cooler thermostat would just allow coolant to start flowing to the engine sooner. it really won't let your engine stay cool. and the reason why it runs rich is because the ECT sensor will see that the engine is still cold and will keep dumping more fuel to warm up the engine.
 

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ur talking about 195 to 180 not a huge diff, if u change to a 160 t-stat expect a rich condition, i have seen no negative issues with my 180 t-stat, the fact that u threw a cel due to a t-stat change totally blows my mind, did u even pull the code man? before u reset ur pcm??
 

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i see no power gains from doing this mod tho.
 

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with my 180, i have no fuel enrichment problems, and the car is faster as OvenMan said (not due to HP or torque gains, but lower engine temps)

As for damage. right below the thermostat is a wiring harnass of some sort...one slip of the wrench can cause codes...if you are not seeing the code after a pcm reset and a few miles it shouldn't be a problem then.

C
 

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SRT-4 Neon said:
with my 180, i have no fuel enrichment problems, and the car is faster as OvenMan said (not due to HP or torque gains, but lower engine temps)
C
a cooler thermostat won't keep your engine cooler...it'll just take longer to warm up.
 

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no, but it will allow cooler air thru the radiator which helps to reduce the temp of the manifold thats right behind it. that leads to cooler air into the engine...and hence better performance.

don't believe it? stick a bag of ice on your intake before a track run some day.

Do a search. back to late 2003 when this subjecy originally came up. see how some of the people now running 11's and 12's explained the subject...there is a magic temperature with our cars of 170 F. Every run when I've launched at about that temperature I've had my best runs ET wise. now lets do some math..

210-170 = 40 F
180-170F = 10 F

so which thermostat will get you closer to that magic number and give better odds of running a faster ET?

over 10000 miles on my Stant 180...i believe i'll keep it.

C
 

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SRT-4 Neon said:
with my 180, i have no fuel enrichment problems, and the car is faster as OvenMan said (not due to HP or torque gains, but lower engine temps)

C

The only thing that makes your car faster is torque gain or weight lost. Lowering engine temps doesn't just make your car faster, it would've had to have gained some power.


SRT-4 Neon said:
no, but it will allow cooler air thru the radiator which helps to reduce the temp of the manifold thats right behind it. that leads to cooler air into the engine...and hence better performance.

C

Changing your thermostat doesn't allow cooler air through the radiator. Changing your thermostat allows coolant to flow through the engine at a lower temperature. The thermostat opens up at 180 degrees, allowing coolant that has been cooled by the radiator to flow into the engine. When the engine temp drops low enough, the thermostat closes, and coolant stops flowing through the engine. Some coolant stays in the radiator and cools down, while some stays in the engine and heats up. When the coolant temp in the engine reaches 180 degrees again, the thermostat opens back up and coolant flows.


SRT-4 Neon said:
there is a magic temperature with our cars of 170 F

Cars with magic things going on are pretty cool.
 

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cooler coolant temps = cooler engine, cooler turbo= cooler intake and less friction drag (keeps oil happy)= more powah!!! :D . <--- that's a period
 

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Something I do everyday when I get home is crank the defroster on high and hot. This drops my temp to around 180-195. Guess if your someone that goes to track this might be some benifit if you want to cool down your engine to these temps within 1 min.
 

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Narcisse91 said:
The only thing that makes your car faster is torque gain or weight lost. Lowering engine temps doesn't just make your car faster, it would've had to have gained some power.





Changing your thermostat doesn't allow cooler air through the radiator. Changing your thermostat allows coolant to flow through the engine at a lower temperature. The thermostat opens up at 180 degrees, allowing coolant that has been cooled by the radiator to flow into the engine. When the engine temp drops low enough, the thermostat closes, and coolant stops flowing through the engine. Some coolant stays in the radiator and cools down, while some stays in the engine and heats up. When the coolant temp in the engine reaches 180 degrees again, the thermostat opens back up and coolant flows.





Cars with magic things going on are pretty cool.
except you forget...colder intake equals more dense air into the engine...so that means better torque and HP i guess...that would result in faster...

look do it or don't do it people. its your choice. everyone i know who races makes the 15 degree colder thermostat swap. it was the first thing I ever did to my 72 comet. I didn't invent the idea, i've just seen it work. Its not magic, its easy physics.

C
 

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SRT-4 Neon said:
except you forget...colder intake equals more dense air into the engine...so that means better torque and HP i guess...that would result in faster...

look do it or don't do it people. its your choice. everyone i know who races makes the 15 degree colder thermostat swap. it was the first thing I ever did to my 72 comet. I didn't invent the idea, i've just seen it work. Its not magic, its easy physics.

C
Dont forget better timing at lower temps = more hp. I have a dyno graph that proves a 180 thermo helps alot i mean ALOT. at baseline i dynoed 298 whp with 160-170 temps. at normal temps 200+- i dynoed 265 whp. This was proven twice. not to mention on the freeway when your running 180 and hit it... oh ya, big difference. just my o2 tho. take for what its worth. billy
 
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