Well, is good to have Boost Meter and Water Temperature Meter for your rotary engine.
Boost Meter is for you to monitor pressure of the engine, when the car idling, make sure the vacuum reading (boost meter) is pointing at -0.6 to -0.8. If you really cherish your engine, please do not boost your engine more than 1 bar.
Next, Water Temperature Meter is for you to monitor your engine’s temperature. In Malaysia, 90-105 Celsius is normal if you driving on afternoon while 80-90 Celsius when you driving at night time. Please shut down your engine if the water temperature is higher than 105 Celsius or start to monitor your water meter when reach 100 Celsius. It will be nice to have a fan installed behind the intercooler and in front of radiator. I used to turn on the fan when the traffic is jam, you will surprise it will reduce 5 – 10 Celsius of water temperature meter depend on weather condition.
One of my friend in Penang told me his friend's Nissan Skyline do not install the AIR-Filter on his turbo (because he want to have fast response), after few months, he found out that intercooler not able to reduce the temperature of engine because all the dust went to into Intercooler.