chefs2000

From thunderbolt https://youtu.be/S9Lbc2eyyq4 https://youtu.be/cfu4y41pbY0 https://youtu.be/JsqIy49ByOI Ran all day no issue till last 2 sessions .. With over heating .. Picked up a mr sideways radiator and getting rid of the koyo ... Should solve my issues ...

michaelnyden

Do you have an oil cooler? What temp is your oil at?

chefs2000

No oil cooler yet .. That's my next winter project .. Oil hasent got over 250 in the oil pan ... I don't know if it's hotter at a sandwhich plate ..

beechx1

An oil cooler will keep your water temperatures down.

chefs2000

really ? Care to explain for my own knowledge please .. And thanks I will be adding one in winter

beechx1

A car engine is about 30% efficient. That means that about 30% of the energy in the fuel is converted to mechanical work that makes the car go. The rest is converted to heat. Some of this heat goes out the exhaust system. The rest must be rejected in some other way to prevent the engine temperature from continuing to climb. Some of this heat is rejected though the outer surfaces of the block and heads, but not nearly enough to keep the temperatures down. Some is rejected through the oil pan (our cars have an aluminum oil pan with fins that helps cool the oil and keeps the oil from getting as hot as it would without a finned aluminum pan - aluminum is a very good heat conductor). The rest of the excess heat is transferred to the water which heats the water as it flows through the block and head. This water is pumped to the radiator where it is in contact with the radiator which in turn is cooled by air flowing over it. Thus, the radiator's primary job is to reject heat from the engine, and the bigger the radiator (or the faster the air flow over it) the more heat it can reject. Also, the higher the temperature difference between the air and the water, the more heat the radiator rejects. The engine overheats when the radiator cannot reject as much heat as it needs to.

Oil - like water - collects heat as it moves through the block and the head. This of course heats up the oil just like the water is heated up. When the oil runs through an oil cooler, it rejects engine heat that it picked up just like the water does. Because of this, adding an oil cooler is like adding more surface area to your radiator - it is another heat exchanger that rejects engine heat. Therefore, if the oil cooler is rejecting engine heat, the radiator doesn't have to reject as much.

Of course, if you put an oil cooler in front of the radiator (like I did) the air going into the radiator is warmer than if the oil cooler weren't there. This makes the radiator less efficient. However, the net result is more heat exchanger surface area to reject the amount of heat the engine needs to get rid of. The end result is the overall system consisting of the water cooler and oil cooler reject more heat than the water cooler system alone. This is why an oil cooler helps keep the water temperature down when the water cooling system is near or over its capacity to reject heat.

In essence, the engine must reject a given amount of heat. When the water cooling system is near or over it's capacity to reject heat, the oil cooling system picks up part of the load.

See my oil cooler installation here. KW kit with oil cooler and brake ducts

chefs2000

Thanks brother ! It's set up nicely ..