Quote:
Originally Posted by Hawk77FT
From what i know the oil temp is controlled by the temp of the coolant. I dont think there is a thermostat on the oil cooler plate.
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To use the body as an analogy, the heart constantly pumps blood through the central circulatory system. When the body gets hot, blood vessels dilate opening the peripheral circulatory system to the skin where hot blood goes to be cooled via conduction and evaporation.
For a car, the coolant is pumped via the water pump constantly through the engine. When the engine gets hot, the thermostat opens so hot coolant can be cooled via conduction at the radiator.
Some external oil coolers have a thermostat, so that cool oil isn't circulated through the cooler when it is cold, which could delay getting the oil up to proper operating temperature, or it could keep the oil too cold and thick for those living in areas where the winters get colder.
The JR setup doesn't have a thermostat at the cooler says you, so oil is constantly being sent to the cooler. This may not be a problem for those in cooler climates for the winter months because the warm coolant will keep the oil at a regulated temperature.
Here is my point: the Forester XT regulator circulates coolant from the block or central system to the regulator. It doesn't pull any coolant from the radiator side. With the XT regulator, when the engine is cold and warming during initial driving, coolant raises in temperature faster than oil raises in temperature, which will help to warm the oil and get the car up to proper operating/racing temps faster. This is good. The JR setup won't do this because when the car is cold the thermostat is closed, so water is just sitting in the radiator, not circulating, not getting warm. So the idea is that the Forester XT setup helps to get the oil warm and keep it cool. The JR setup just helps with cooling, much better cooling, so that is why I would keep both.