start by purchasing AND READING a SHOP MANUAL FOR YOUR SPECIFIC YEAR CORVETTE
http://www.helminc.com/helm
the correct matching SHOP MANUAL CAN BE VERY USEFUL
this is not a shop manual but it might be helpful
the OEM sensor and fans turn on at those higher temps
the higher temps are designed to lower emissions but you get better engine durability and power if you keep coolant below 195F and oil temps under 215F
most of the time
cooling off that c4 corvette
your stock corvette http://garage.grumpysperformance.com/index.php?threads/thoughts-on-cooling.149/page-3#post-107697 has a rather marginal cooling system if your engines been modified for significantly higher hp levels, that cooling system can be significantly improved upon.I run into this...
garage.grumpysperformance.com
swapping to a 180F T-stat certainly won't hurt drilling two air bleed holes may help coolant temp maintain consistency
and you can swap to a 190F sensor that turns on the fans earlier
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