My turbo car has a Haltech ecu that provides an actual temp reading, but the Toyota ecu/gage is still functional as well - so I've been able to kinda make a correlation between the two... I've never seen it get over 205, even when on the dyno where the engine is really putting out and there's not real world airflow to keep it cool. Idling in the summer (95° ambient) with AC off, it dithers between 185 and 200. With AC on, it dithers between 175 and 190.
My stock car just has the OEM gage.
Last edited by Hodgdon Extreme; 05-12-2019 at 06:57 PM.