Like others have suggested, I would look into airflow issues first. I have found on mine that when I had an Air to oil cooler installed I would get debris build up between the core and the radiator. I have also found as much as 40 degree temp swings on track depending on the ducting being deployed around the radiator. Less ducting to keep air going through the radiator area quickly raised the temps.
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2010 Monterey Blue 370Z
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