Quote:
Originally Posted by venturaII
So a red hot turbo is able to be cooled adequately by coolant, but oil somehow cannot be cooled by the same coolant over a larger area? And does the turbo not also have oil running through it as well, contributing significantly to oil temps? Sorry - this is sounding more and more like an effort to sell aftermarket stuff, and less like a discussion of how things actually work in real life.
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Turbos don't get red hot unless you're driving them hard.
For that matter, a *STOCK* WRX overheats coolant in 3 back to back pulls on the dyno. MGT2259S. You're welcome to look up specs yourself; it is a *water cooled* turbo.
I think you confuse the conducted heat of the oil in the turbocharger, versus the frictional heat generated in the oil by RPMs.
It's a very simple test you can do yourself. Go on the highway, and watch your oil temps by cruising in 3rd gear. You may be shocked at how quickly they climb.