Wanted to see what everyone on here gets for temperature on their intake and water.

Outside temp: 60-63F

Stand-still max intake temp: 140F (accurate)
Stand-still max water temp: 211F (accurate)

Highway cruising observed average intake temp: 70F
Highway cruising observed average water temp: 170F

I have the following cooling mods.
-Mishimoto Radiator
-Mishimotor Fan Shroud
-Nismo Low Temp Thermostat

For the benefit of those who cannot get measurements on their car, my engine temperature gauge is well below the midpoint all the time.

 

post a pic of where your car runs on the temp gauge.

What did you use to get the measurements?

 

All that counts is the temperature of the cylinder heads and this should be fairly stable if you have ENOUGH coolant volume in system. After all that is the sole purpose of cooling system other than to provide interior heat in winter.

 

Isn't the water temperature directly correlated to the cylinder head temperature? I feel that eventhough I have those upgrades on my car that my engine still runs hotter then it should, comparing to when it was stock. If those numbers are average and normal then I'd be happy.

I have a Greddy Info Touch that plugs into the OBD2.

 

The purpose of the water temperature is to show how much heat is being removed from cylinder heads. Placing another sensor on the radiator return pipe to engine shows the differential temperature or efficiency of radiator.

Never trust oem inside gauge as they are designed to have a sticky slow response. For accurate readings use a Consult to read the main ecu sensor which is accurate +-2F at 176F.
The important thing is to make sure that the main ecu coolant sensor doesn't exceed 200F as at this point the ecu starts retarding ignition advance by 1 degree for every 5F increase to a max of -5 degrees at 220F +- 1F.

This summmer overheat protection software has been used in all Nissan ECU for the past 30 years as a standard, only deviating slightly with the kickin temperature whether 195F or 200F.

Ideally the coolant flowing out of the head should be stablized at 174-194F when operating at speed.

 

Q, how quickly does the ECU retard timing?

Does it have to be running at a specific RPM or does it automatically change timing once temp hit a specified value?

 

Thanks for the response.

So if I understand you correctly then the water temperature I am getting from the OBD2 port is from the water inside the engine. You recommend having another sensor at the lower hose on the driver side to gauge the radiator's performance.