Quote:
Originally Posted by 2forme
Right, but the aFe and stock intakes pull air from the front bumper regardless of whether or not the hood is open. The Injen and AIRAID units pull more air from the engine bay. As the temps rise in the engine bay, the power these intakes put out decrease (the effect is rather quick, actually). By just leaving the hood open for all intakes, you're negating this effect, which can produce unrealistic results.
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This.
Plus the presence of the snorkel in all these tests (where the Airaid and Takeda need a snorkel delete for best results) is why I think everyone should take these results with a huge grain of salt.