Quote:
Originally Posted by 86TOYO2k17
It’s probably done because of design limitations without drastically changing the bumper brace or removing the bumper foam piece and spending more money. The oem design has no airflow access from the front, it is just taking in stagnant air adjacent to the engine bay only blocked from the engine by a thin piece of plastic and a little foam. Seems far from ideal.
I am not talking about changing to a ram system with high pressure air either. Just having access to the fresh cold air coming through the front grille and being able to have that air cool the air in the space previously occupied by bumper bar and foam. And possibly being able to “suck” air from that cold stream but not “ramming it” and not redirecting the high pressure air to come in the grille and then curve up to the filter location or bringing the intake duct end closer to the high pressure air either. Just allowing a direct link between filter and direct cold air while maintaining a low pressure zone.
My IAT dropped a good amount switching to my custom setup. Although my reasons for switching and doing this had nothing to do with this was just a pleasant bonus. Wish i had pics when bumper was off.
|
One note is that (iirc) Perrin's r&d paper on their CAI said they experimented with removing the air dam between the grille and filter element and found that it created some turbulence that affected the MAF. Since accurate MAF is kind of important for making power, they left the air dam alone.