Quote:
Originally Posted by PaleMelanesian
Quoted for Truth.
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Umm.. not exactly. While it may be so miniscule(sp) that it isn't NOTICEable at low-load/low-rpm, fixing any restriction in your intake tract will actually promote better airflow anyway. Plus, you don't magically have 3lbs of pressure loss at full load/high RPM... it builds up to that.. meaning that at normal load/mid RPM, you might have .3PSI of boost restriction (pressure loss/drop)
Part of that pressure drop is not even restriction though, it's just b/c the air charge is more dense when it comes out than it was when it goes in! That adds a whole new dynamic to the equation. If you have a rubber ball, that just barely fits into something, so that it applies pressure on the circumference of a circle, then you nearly instantly drop it's temperature by 30% or more (depending on the setup), it will fall out of that compression fit, which shows that it's not putting as much pressure against the circle. (Or any, in this case.)
Anyway, that's why I suggested a full header and such... the scavenging effect will actually increase airflow, rather than "unrestrict" it, and the full length tube headers usually increase low-mid torque as well.