dldjros69 wrote:
Naa no over heating.
According to my BD tuner my coolant temp stays around 188.
Remember the article Matt wrote about dyno myths. A cooler engine makes more power. So after heat soak sets in and you have been driving for awhile you make less power. What engine ice does (or what i thought it did) is keep the operating temperature lower. So less heat means more power.
Your BD Tuner coolant reading of 188 degrees F. is normal. I looked in the Nissan Altima Service Manual, and found the specs for the thermostat. It starts to open at 177 degrees F, and is fully open at 182 degrees. The ECM controls the cooling fan speed corresponding to vehicle speed, engine coolant temperature, and A/C refrigerant pressure. The cooling fan turns on to its low speed at 208 degrees F, and at 212 degrees F, operates at high speed until the coolant temperature drops.
I think that you are confused about heat soak. The term, “heat soak” refers to a raise in the engine coolant system temperature and pressure after the engine is turned off. At this time, the combustion process is terminated. This terminates the momentum of the crankshaft, which in turn stops the turning of the water pump. As the coolant is no longer being circulated, the temperature rises. The coolant system is designed to cool the engine from the temperatures created from the combustion process occurring inside the engine cylinders.
Understanding Heat Soak
http://cjbfire.com/Heatsoak.pdf
Matt was talking about dynamometer testing. During this test, the vehicle is strapped down to the dyno and air is blown over the engine via a fan to assist with cooling while imitating airflow since the vehicle is stationary.
Today's cooling system must maintain the engine at a constant temperature whether the outside air temperature is 110 degrees Fahrenheit or 10 below zero. If the engine temperature is too low, fuel economy will suffer and emissions will rise. If the temperature is allowed to get too hot for too long, the engine will overheat and self destruct.
More info on cooling systems:
http://www.familycar.com/Class...m#reg
Matt said “Engines produce the most peak horsepower when they are cold.” Don’t take this comment too literally. “When they are cold…” is not meant to mean that in January in International Falls, Minnesota, when the temperature is -15 below zero, your Altima makes more horsepower when you first start it in the morning, than it does when it reaches normal operating temperature.
Unless your car is overheating, all that a larger capacity radiator would do for you is take longer for all of the coolant to reach normal operating temperature. Your thermostat would still open at the same temperature, and keep your car at the proper temperature. Engine Ice might work great in racing motorcycles, but it is not needed in your car.