Well ill have the diffuser fitted over the weekend, i dont get home from work until 8pm to work on the car. Sorted out the guage memory, they have peak warning and recal functions. There green day/night and the warning is set at 120 degrees oil temp and if the pressure drops below 14psi. They flash red, turned of the LOUD warning beep as it was too much. If you hit the peak button it shows the highest reading recorded.
Water temp is dealt with using by techtom cmx100: plugs directly into the obd diagnostics port, displays map, volts, rpm, speed, ignition timing, error codes,intake air temp, and most of all water temp!
So i have a digital display from cold for water temp, also ofc have the standard temp and pressure guages.