Originally Posted by jnaut
Quote:
As for the oil cooler situation, Travis I would only run oil to water...multiple reason's.
1.Water is more efficent than air in transferring heat. True, unless that water is also hot. Cooling 230 degree oil with 210 degree water may not be as effective as cooling 230 degree oil with 80 degree air. Granted, since water is much more effective the temperature difference can be smaller for the same effect, but there's a point where it is less effective. Again, you MUST have an adequate water cooling system for it to work.
2.The whole system will weight less than any oil to air system, that gives you equal cooling. Not sure if you have weighed both systems but the air/oil cooling system vs. the water/oil cooling system we used on the car I race weighed about the same. Totally different cars though.
3.You have more options in location, leaving the front open for intercooler/radiator. Agreed. Plus you can put the weight in a more ideal place.
4. With mulitple large oil to air, I have a feeling that you are taxing the factory oil pump. I would rather have the pressure/volume to the engine.Being the most oil to water are about a 1/3 in overall size to the comparable oil to air, less stress on oil pump. Agreed.
The situation with the 135i is not comparable for obvious reasons, installer/chassis/equipment plus BMW cooling system is horrendous. If there's one car that I would say is worse than the BMW cooling system its the 370Z.
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Bonnani, good info but remember you are cooling the oil with the output of the radiator. On average output temps are around 165-170 not 210 to 230 so this will help keep oil temps in check.
A little off topic but I had '08 x5 in the shop last week, for an overheat conditio, now that cooling system is horrible!! The electric wp went bad @ 52k miles.