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What's up with thermostat temps?

suitercrew

New member
So gm recommends the 195 thermostat. My question is why does everyone put a colder one in there and are there any benefits for n/a or just supercharged?

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Power and heat.

You make alot of heat with power, a cooler thermostat can keep the motor cooler.

95% of us never make enough heat to make it matter, they run better at 190-195 anyway.

If you were hot lapping a car and didnt have a ton of cool down time, a cooler thermostat could help as it would stay open more and allow the radiator to cool it off more.
 
OK that sounds right so I probably wouldn't need a colder thermostat running a lightly modded n/a. Also is 195 just the recommended tstat or the recommended engine temp cause I'm in AZ and when I run a 195 tstat my actual coolant temp gets up to about 220 is that normal?

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195º is GM's recommended temp thermostat, it wouldn't really change much even if you switched.

When moving, the coolant will be around 190-200 with airflow through the radiator. If you are in traffic or not moving much, it's normal for temps to rise that high. GM fan settings are 212-214 and 226 for high and low speeds. I wouldnt consider it hot untill you are seeing 235-240, then you are tipping into a danger zone if it got warmer.
 
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