Originally Posted by 3i2011
Disclaimer: I have no f***ing clue what I'm about to talk about so take it with a grain of salt
Intake isnt bigger, it can just allow more air to flow through? I guess porting the throttle body throws off the maf because its a bigger diameter opening so the same amount of air comes through slower compared to stock? Maybe? So the maf reads its getting less air than it actually is? Sort of like a 1 gallon per minute pipe with a diameter of 1 foot. Open it to 2 feet, to get the same 1 gallon per minute, the water is going to move slower. Someone who knows whats going on, am I on the right track?
Sort of. You are talking about volumetric flowrate. To keep the same flowrate, the velocity decreases as the diameter gets bigger or the velocity increases as the diameter decreases. (pVA)1 = (pVA)2. p=density of air, V=velocity of air, A=area of opening.