Quote:
Originally Posted by rb6freak
It doesn't matter all too much if you're pulling in hot air. It will be hot when it touches the turbo no matter what. The intercooler is there to cool down the hot air from the compressor.
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The temperature of the air going into the turbo DOES matter. The lower the temperature, the more dense it is. The more dense it is, the turbo has to work less to achieve the desired manifold pressure, and the less heat the turbo adds to the intake charge that the intercooler has to remove later. However, if you're adding extra restrictions to the intake system in order to draw cool air, then you may lose more than you gain. Getting cool, atmospheric pressure (or higher) air to the turbo inlet is never a bad thing if you can manage it.
But yes, PTUNING has a heat shield around the air intake.