If it was as simple as having it open all the time, I don't think DC would have wasted the money on the valve.
The engineering explanation is that optimum tuning changes with speed due to resonances (behaviors and interactions that are frequency dependent) of the intake air cavities. It may even have something to do with valve overlap (a brief period of time during engine rotation when intake and exhaust valves both are open, which is why some backpressure in the exhaust is needed for low end torque - again - has to do with resonances, tuning, etc. - not intuitive stuff unless you work with it all the time.
'98 LXi - Later Concorde gages (black w/ chrome rings)/'99 LX - LHS gages (white) - HIR bulbs
Last edited by peva; 01-19-2003 at 06:55 PM.