Not sure that NC ambient temps are close to Az summers where we have hit 122! Doesn't your car have a fan switch that will turn on at a certain temp? Mine turns on at 205 but I have a 185 deg that I might put in soon if I need a little extra cooling. 230 isn't good for your engine! My fan is a two speed unit that runs kinda slow if the A/C is on then faster when it hits 205.
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