ok i don't know as much about engines and tuning an stuff as you guys, but i do know my physics pretty well. rule one: volumetric flow through a system is constant. the volume of air flowing through the inlet is equal to the air flowing through the outlet is equal to the volume of air flowing through any given point of the system. it's mechanical equivalent to current in an electrical system. current in = current out.

think about a garden hose with water flowing through it. if you couple it to a fire hose and then drinking straw (all in series) the amount of water you put in better equal the amount of water that comes out. otherwise, wtf happen to the rest of the water or where did the extra water come from? the amount of water flowing through any given point is the same. yes it will move more slowly through the fire hose and faster through the straw, but the volume of water flowing is still the same. the amount of water that comes out at the end of the straw will be the same as the amount that was put in the garden hose at the other end.

the same applies to the air intake system. the air may speed up when it reach a small stock TB. however, the volume of air flowing there is still the same as anywhere else. i don't think all the discussion about velocity is really valid. whatever happens at the TB/manifold junction is irrelevant. the final velocity of the air entering the engine occurs where the air enters the engine. it is different from where the air enters the manifold. this is why those 'vortex' POS deals on ebay that claim to increase air velocity in your intake do not work. they are being trutful - the air does speed up at that point. however imediately after it slows back down to exactly what it was before the 'vortex'.

that being said, you're just looking to increase air flow. not velocity. that's what having a CAI, or porting, or an oversized TB does - they increased the volume of air that can taken up by reducing the overall resistance of the system. decreased resistance = increased flow. just as decreased resistance = increased current in an electrical system. maybe i'm way off on this but looking at it from a physics aspect, this seems to make the most sense.

-marc

='95 RS 5spd Red=
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A'pexi N1
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