T-stats are kind of counter-intuitive. The higher the T-stat temp, the longer before it opens letting the coolant in the radiator stay in there longer, letting it cool more. Running a 160° stat will usually increase your temps because it will be open most of the time not letting the radiator do it's job. Try a lower temp stat to raise your temp a little. As stated above, you need heat to get proper combustion efficiency.
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1978 Y88 Trans Am
4-Speed
47k original mile Survivor
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