Quote:
Originally Posted by Palbay
Yes, I'm not an engineer,but you would get the flowthru effect w/ the car at speed.I still believe it would help at idle or low speed.Hot air rises.Look at most modern auto hood systems...they are completely sealed except for the front grill openings.
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But isn't that bit just in front of the windshield a high-pressure area? That's why they put the air intakes there for the passenger compartment. Which means that at speed air would be forced IN through those vents, even though it would rise out at rest.
If there is, indeed, a heat problem, I'm guessing it is from the catalysts and not the turbos. The turbos are cooled both by oil and by coolant, and they have a supplemental pump that keeps them cooling after engine shutdown. But the catalysts -- also right there at the back of the V at the top of the engine -- have no cooling at all. In fact quite the opposite: they need to have their contents almost red hot in order to work correctly.