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Originally Posted by sunfire_starter
Yes cold air is moving past the engine but it get heated up by the engine because of it being so hot. Your getting less dense air from there compared to in the wheel well. The only really hot object there is the tire but that doesn't create enough heat to put out alot higher tempeture readings. But the tempeture readings in the engine bay compared to the wheel well is not more than a few degrees part so the effect is minimal hence why you only get maybe 10 HP if your lucky out of it. If they were smart they would put a fan in the middle of the pipe and have drops of N2 into the fan so it cools the air coming in but doesn't hurt the combustion or something along those lines so you could get atleast like 30 HP out of it from $150 piece of piping. Hell 20 HP would do fine.
As for Short Ram vs. CAI it all depends on what you want out of the car. Short Ram adds more HP across the lower end RPM range, CAI does just the opposite. It adds maybe 10 HP out of it.
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hes 100% correct, he left out one thing though
While CAI can add sometimes up to 10HP,a ram air will only add 5HP at MAX