Do you or don't you need a therostate?

Do you or don't you need a therostate?
thermostats are an integral part of the cooling system. They help the engine reach normal operating temperature speedily by restricting the flow of coolant thruout the motor. late model engines are temperature dependent and have a computer therefore all of the sensors are hooked up together to provide balanced information so that the engine runs efficiently.Climate is a consideration for thermostat selection. the coolant is channelled thru the inlet manifold therefore there is a direct impact on the pre heating of the fuel .