The Cosworth 76° Thermostat has been engineered and developed to fight high temperatures during high performance driving.
When compared to other thermostats, the Cosworth thermostats have the ability to control the flow of coolant once the valve opens. And the Cosworth units have the ability to stabilize the engine temperatures under extreme conditions where the engine could be going through Dyno or tuning conditions.
The opening will begin at 76° C (194°F), and is completely open at 95°C. The engine running temperature is 90-92°C (194-198°F)
With reduced operating temperatures, you will have improved volumetric efficiency, as well as knock limit.